Water Quality in MISSOULA, MT (59801)
EPA violation data for public water systems serving ZIP code 59801.
449
Total Violations
40
Health-Based
409
Monitoring / Reporting
444
Resolved
What does this mean?
444 of 449 violations have been resolved. 40 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 409 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.
Violations Detail (449 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2025 | Active | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2025 | Active | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | May 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | May 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | May 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | May 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Apr 30, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Apr 30, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Apr 30, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Apr 30, 2025 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jan 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jan 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jan 31, 2025 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Dec 29, 2024 | Active | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Oct 31, 2024 | Active | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Oct 31, 2024 | Active | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 30, 2024 | Resolved | N/A |
| Bromate | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | Increased risk of cancer |
| Bromate | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | Increased risk of cancer |
| Bromate | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | Increased risk of cancer |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Jun 30, 2024 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Feb 29, 2024 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Feb 29, 2024 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Feb 29, 2024 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Feb 29, 2024 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Feb 29, 2024 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Feb 29, 2024 | Resolved | N/A |
| Bromate | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | Increased risk of cancer |
| Bromate | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | Increased risk of cancer |
| Bromate | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | Increased risk of cancer |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2023 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Nov 30, 2023 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Nov 30, 2023 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Nov 30, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Nov 25, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Nov 25, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Nov 25, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Nov 25, 2023 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Sep 30, 2023 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Sep 30, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Nitrite | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | May 31, 2023 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | May 31, 2023 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | May 31, 2023 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | May 31, 2023 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Dec 31, 2022 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Dec 31, 2022 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Dec 31, 2022 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Oct 31, 2022 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Oct 31, 2022 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Oct 31, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 28, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 28, 2022 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Aug 31, 2022 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Aug 31, 2022 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Aug 31, 2022 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Aug 31, 2022 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Aug 31, 2022 | Resolved | N/A |
| Groundwater Rule | Health-Based | N/A | N/A | Aug 31, 2022 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Jul 31, 2022 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Jul 31, 2022 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Jul 31, 2022 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | Jul 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Jul 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Jul 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Jul 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Jul 31, 2022 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Atrazine | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | Cardiovascular system or reproductive problems |
| Atrazine | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | Cardiovascular system or reproductive problems |
| Atrazine | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | Cardiovascular system or reproductive problems |
| Chlordane | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Atrazine | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | Cardiovascular system or reproductive problems |
| Chlordane | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | May 31, 2022 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | May 31, 2022 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | May 31, 2022 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | May 31, 2022 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | May 31, 2022 | Resolved | N/A |
| Groundwater Rule | Monitoring | N/A | N/A | May 31, 2022 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Atrazine | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | Cardiovascular system or reproductive problems |
| Atrazine | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | Cardiovascular system or reproductive problems |
| Heptachlor | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Atrazine | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | Cardiovascular system or reproductive problems |
| Endrin | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Atrazine | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Cardiovascular system or reproductive problems |
| Toxaphene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrate-Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Atrazine | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Cardiovascular system or reproductive problems |
| Atrazine | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Cardiovascular system or reproductive problems |
| Atrazine | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Cardiovascular system or reproductive problems |
| Endrin | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Aug 31, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Aug 31, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Aug 31, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2021 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2021 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Picloram | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| 2,4,5-TP | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Methoxychlor | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Atrazine | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | Cardiovascular system or reproductive problems |
| Atrazine | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | Cardiovascular system or reproductive problems |
| Atrazine | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | Cardiovascular system or reproductive problems |
| Methoxychlor | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Endrin | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| BHC-GAMMA | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Toxaphene | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Dalapon | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) adipate | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Simazine | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Di(2-ethylhexyl) phthalate | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Dinoseb | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Carbofuran | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| LASSO | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Heptachlor | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Heptachlor epoxide | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| HEXACHLOROBENZENE | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Pentachlorophenol | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Hexachlorocyclopentadiene | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| OXAMYL | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Chlordane | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| Benzo(a)pyrene | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
| 2,4-D | Monitoring | N/A | N/A | Jun 30, 2021 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(16)
Lead and Copper Rule
52
Lead and Copper Rule
52
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
2024(32)
Lead and Copper Rule
66
Lead and Copper Rule
52
Lead and Copper Rule
52
Lead and Copper Rule
52
Lead and Copper Rule
52
Lead and Copper Rule
52
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
Lead and Copper Rule
52
Lead and Copper Rule
52
Lead and Copper Rule
52
Bromate
27
Bromate
27
Bromate
27
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
2023(30)
Bromate
27
Bromate
27
Bromate
27
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Revised Total Coliform Rule
2A
Revised Total Coliform Rule
2A
Revised Total Coliform Rule
2A
Revised Total Coliform Rule
2A
Consumer Confidence Rule
72
Consumer Confidence Rule
72
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Nitrite
03
Nitrate-Nitrite
03
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
2022(196)
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
Lead and Copper Rule
66
Lead and Copper Rule
66
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
41
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Benzo(a)pyrene
03
Toxaphene
03
Atrazine
03
Atrazine
03
Atrazine
03
Chlordane
03
Chlordane
03
Chlordane
03
Benzo(a)pyrene
03
Atrazine
03
Chlordane
03
Benzo(a)pyrene
03
Toxaphene
03
Endrin
03
Endrin
03
Endrin
03
Endrin
03
Toxaphene
03
Toxaphene
03
Benzo(a)pyrene
03
BHC-GAMMA
03
BHC-GAMMA
03
BHC-GAMMA
03
BHC-GAMMA
03
Methoxychlor
03
Methoxychlor
03
Methoxychlor
03
Methoxychlor
03
Dalapon
03
Dalapon
03
Dalapon
03
Dalapon
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
OXAMYL
03
OXAMYL
03
OXAMYL
03
OXAMYL
03
Simazine
03
Simazine
03
Simazine
03
Simazine
03
Picloram
03
Picloram
03
Picloram
03
Picloram
03
Dinoseb
03
Dinoseb
03
Dinoseb
03
Dinoseb
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
Carbofuran
03
Carbofuran
03
Carbofuran
03
Carbofuran
03
LASSO
03
LASSO
03
LASSO
03
LASSO
03
Heptachlor
03
Heptachlor
03
Heptachlor
03
Heptachlor
03
Heptachlor epoxide
03
Heptachlor epoxide
03
Heptachlor epoxide
03
Heptachlor epoxide
03
2,4-D
03
2,4-D
03
2,4-D
03
2,4-D
03
2,4,5-TP
03
2,4,5-TP
03
2,4,5-TP
03
2,4,5-TP
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
Pentachlorophenol
03
Pentachlorophenol
03
Pentachlorophenol
03
Pentachlorophenol
03
Di(2-ethylhexyl) phthalate
03
Revised Total Coliform Rule
3A
Di(2-ethylhexyl) phthalate
03
Di(2-ethylhexyl) phthalate
03
Di(2-ethylhexyl) phthalate
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Groundwater Rule
31
Heptachlor
03
Methoxychlor
03
Methoxychlor
03
Methoxychlor
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
Heptachlor
03
Atrazine
03
Atrazine
03
Heptachlor
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
Atrazine
03
Endrin
03
Toxaphene
03
2,4-D
03
2,4-D
03
2,4-D
03
2,4,5-TP
03
2,4,5-TP
03
2,4,5-TP
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
Pentachlorophenol
03
Pentachlorophenol
03
Pentachlorophenol
03
Dalapon
03
Chlordane
03
Chlordane
03
Dalapon
03
Carbofuran
03
Carbofuran
03
Picloram
03
Picloram
03
Picloram
03
Di(2-ethylhexyl) phthalate
03
Dinoseb
03
Dinoseb
03
Dinoseb
03
LASSO
03
LASSO
03
LASSO
03
BHC-GAMMA
03
BHC-GAMMA
03
OXAMYL
03
OXAMYL
03
OXAMYL
03
Endrin
03
Toxaphene
03
Di(2-ethylhexyl) phthalate
03
Di(2-ethylhexyl) phthalate
03
Chlordane
03
Simazine
03
Simazine
03
Simazine
03
Dalapon
03
BHC-GAMMA
03
Endrin
03
Heptachlor epoxide
03
Heptachlor epoxide
03
Heptachlor epoxide
03
Benzo(a)pyrene
03
Benzo(a)pyrene
03
Benzo(a)pyrene
03
Toxaphene
03
Carbofuran
03
2021(175)
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Atrazine
03
Toxaphene
03
Toxaphene
03
Toxaphene
03
Toxaphene
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Nitrate-Nitrite
03
Atrazine
03
Atrazine
03
Atrazine
03
Endrin
03
Endrin
03
Endrin
03
Endrin
03
BHC-GAMMA
03
BHC-GAMMA
03
BHC-GAMMA
03
BHC-GAMMA
03
Methoxychlor
03
Methoxychlor
03
Methoxychlor
03
Methoxychlor
03
Dalapon
03
Dalapon
03
Dalapon
03
Dalapon
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
Simazine
03
Simazine
03
Simazine
03
Simazine
03
Dinoseb
03
Dinoseb
03
Dinoseb
03
Dinoseb
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
Carbofuran
03
Carbofuran
03
Carbofuran
03
Carbofuran
03
LASSO
03
LASSO
03
LASSO
03
LASSO
03
Heptachlor epoxide
03
Heptachlor epoxide
03
Heptachlor epoxide
03
Heptachlor epoxide
03
2,4-D
03
2,4-D
03
2,4-D
03
2,4-D
03
2,4,5-TP
03
2,4,5-TP
03
2,4,5-TP
03
2,4,5-TP
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
Benzo(a)pyrene
03
Benzo(a)pyrene
03
Benzo(a)pyrene
03
Benzo(a)pyrene
03
Chlordane
03
Chlordane
03
Chlordane
03
Chlordane
03
Heptachlor
03
Picloram
03
Di(2-ethylhexyl) phthalate
03
Di(2-ethylhexyl) phthalate
03
Di(2-ethylhexyl) phthalate
03
Di(2-ethylhexyl) phthalate
03
Picloram
03
Picloram
03
Picloram
03
OXAMYL
03
Heptachlor
03
Heptachlor
03
Pentachlorophenol
03
Pentachlorophenol
03
Pentachlorophenol
03
Pentachlorophenol
03
OXAMYL
03
OXAMYL
03
OXAMYL
03
Heptachlor
03
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
1A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Methoxychlor
03
Picloram
03
Picloram
03
Picloram
03
2,4,5-TP
03
2,4,5-TP
03
2,4,5-TP
03
Methoxychlor
03
Atrazine
03
Atrazine
03
Atrazine
03
Methoxychlor
03
Endrin
03
Endrin
03
Endrin
03
BHC-GAMMA
03
BHC-GAMMA
03
BHC-GAMMA
03
Toxaphene
03
Toxaphene
03
Toxaphene
03
Dalapon
03
Dalapon
03
Dalapon
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
Di(2-ethylhexyl) adipate
03
Simazine
03
Simazine
03
Simazine
03
Di(2-ethylhexyl) phthalate
03
Di(2-ethylhexyl) phthalate
03
Di(2-ethylhexyl) phthalate
03
Dinoseb
03
Dinoseb
03
Dinoseb
03
Carbofuran
03
Carbofuran
03
Carbofuran
03
LASSO
03
LASSO
03
LASSO
03
Heptachlor
03
Heptachlor
03
Heptachlor
03
Heptachlor epoxide
03
Heptachlor epoxide
03
Heptachlor epoxide
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
HEXACHLOROBENZENE
03
Pentachlorophenol
03
Pentachlorophenol
03
Pentachlorophenol
03
Benzo(a)pyrene
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
Hexachlorocyclopentadiene
03
2,4-D
03
2,4-D
03
OXAMYL
03
OXAMYL
03
OXAMYL
03
Benzo(a)pyrene
03
Chlordane
03
Chlordane
03
Chlordane
03
Benzo(a)pyrene
03
2,4-D
03
How Does This Compare?
MISSOULA (59801) has 449 recorded violations, including 40 health-based. 5 remain unresolved. Consider testing your tap water independently for added peace of mind.
Recommended Water Filters
Based on the contaminants detected in your area, these filter types may help improve your water quality.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove.