Water Quality in LIBBY, MT (59923)

EPA violation data for public water systems serving ZIP code 59923.

267

Total Violations

Health-Based

250

Monitoring / Reporting

265

Resolved

What does this mean?

265 of 267 violations have been resolved. 17 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 250 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.

Water systems: 98 Population served: 13,465

Violations Detail (267 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Sep 30, 2025	Active	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Sep 30, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	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
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	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 29, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Cardiovascular system or reproductive problems
Simazine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2024	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
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
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Lead and Copper Rule	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
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
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper 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
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
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
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 28, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 28, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 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
Nitrate-Nitrite	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Oct 31, 2022	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Oct 31, 2022	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Oct 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Sep 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
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
Revised Total Coliform Rule	Health-Based	N/A	N/A	Apr 17, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Apr 17, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Apr 17, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2022	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2022	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2022	Resolved	N/A
Long Term 2 Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2022	Resolved	N/A
Long Term 2 Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2022	Resolved	N/A
Long Term 2 Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jan 7, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jan 7, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jan 7, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Revised Total Coliform Rule	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
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
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 29, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 29, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Sep 30, 2021	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Sep 30, 2021	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Feb 28, 2021	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Feb 28, 2021	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Feb 28, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(29)

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Active

Revised Total Coliform Rule

Sep 30Active

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Nitrate-Nitrite

Mar 31Resolved

Nitrate-Nitrite

Mar 31Resolved

Nitrate-Nitrite

Mar 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

2024(104)

Lead and Copper Rule

Dec 29Resolved

Lead and Copper Rule

Dec 29Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Nitrate-Nitrite

Sep 30Resolved

Nitrate-Nitrite

Sep 30Resolved

Nitrate-Nitrite

Sep 30Resolved

Nitrate-Nitrite

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Lead and Copper Rule

Jun 30Resolved

Lead and Copper Rule

Jun 30Resolved

Lead and Copper Rule

Jun 30Resolved

Lead and Copper Rule

Jun 30Resolved

Lead and Copper Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Lead and Copper Rule

Jun 30Resolved

Chlordane

Mar 31Resolved

2,4,5-TP

Mar 31Resolved

Chlordane

Mar 31Resolved

Benzo(a)pyrene

Mar 31Resolved

Endrin

Mar 31Resolved

Endrin

Mar 31Resolved

Atrazine

Mar 31Resolved

Atrazine

Mar 31Resolved

Atrazine

Mar 31Resolved

Simazine

Mar 31Resolved

Simazine

Mar 31Resolved

Simazine

Mar 31Resolved

Di(2-ethylhexyl) phthalate

Mar 31Resolved

Di(2-ethylhexyl) phthalate

Mar 31Resolved

Di(2-ethylhexyl) phthalate

Mar 31Resolved

Picloram

Mar 31Resolved

Picloram

Mar 31Resolved

Picloram

Mar 31Resolved

Dinoseb

Mar 31Resolved

Chlordane

Mar 31Resolved

Dinoseb

Mar 31Resolved

Hexachlorocyclopentadiene

Mar 31Resolved

Hexachlorocyclopentadiene

Mar 31Resolved

Hexachlorocyclopentadiene

Mar 31Resolved

Carbofuran

Mar 31Resolved

Carbofuran

Mar 31Resolved

Carbofuran

Mar 31Resolved

LASSO

Mar 31Resolved

LASSO

Mar 31Resolved

LASSO

Mar 31Resolved

Heptachlor

Mar 31Resolved

Heptachlor

Mar 31Resolved

Heptachlor

Mar 31Resolved

Heptachlor epoxide

Mar 31Resolved

Heptachlor epoxide

Mar 31Resolved

Heptachlor epoxide

Mar 31Resolved

2,4-D

Mar 31Resolved

2,4-D

Mar 31Resolved

2,4-D

Mar 31Resolved

HEXACHLOROBENZENE

Mar 31Resolved

HEXACHLOROBENZENE

Mar 31Resolved

HEXACHLOROBENZENE

Mar 31Resolved

Pentachlorophenol

Mar 31Resolved

Pentachlorophenol

Mar 31Resolved

Pentachlorophenol

Mar 31Resolved

BHC-GAMMA

Mar 31Resolved

BHC-GAMMA

Mar 31Resolved

BHC-GAMMA

Mar 31Resolved

Methoxychlor

Mar 31Resolved

Methoxychlor

Mar 31Resolved

Methoxychlor

Mar 31Resolved

Dalapon

Mar 31Resolved

Dalapon

Mar 31Resolved

Dalapon

Mar 31Resolved

Di(2-ethylhexyl) adipate

Mar 31Resolved

Di(2-ethylhexyl) adipate

Mar 31Resolved

Di(2-ethylhexyl) adipate

Mar 31Resolved

Endrin

Mar 31Resolved

Benzo(a)pyrene

Mar 31Resolved

Benzo(a)pyrene

Mar 31Resolved

Toxaphene

Mar 31Resolved

Toxaphene

Mar 31Resolved

Toxaphene

Mar 31Resolved

OXAMYL

Mar 31Resolved

OXAMYL

Mar 31Resolved

OXAMYL

Mar 31Resolved

2,4,5-TP

Mar 31Resolved

2,4,5-TP

Mar 31Resolved

Dinoseb

Mar 31Resolved

Revised Total Coliform Rule

Mar 31Resolved

Revised Total Coliform Rule

Mar 31Resolved

Revised Total Coliform Rule

Mar 31Resolved

2023(52)

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Lead and Copper Rule

Dec 31Resolved

Lead and Copper Rule

Dec 31Resolved

Lead and Copper Rule

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Lead and Copper Rule

Sep 30Resolved

Lead and Copper Rule

Sep 30Resolved

Lead and Copper Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Lead and Copper Rule

Sep 28Resolved

Lead and Copper Rule

Sep 28Resolved

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Nitrate-Nitrite

Jun 30Resolved

Nitrate-Nitrite

Jun 30Resolved

Nitrate-Nitrite

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Revised Total Coliform Rule

Mar 31Resolved

Revised Total Coliform Rule

Mar 31Resolved

Revised Total Coliform Rule

Mar 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

How Does This Compare?

LIBBY (59923) has 267 recorded violations, including 17 health-based. 2 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

NSF Certified Products → EPA Safe Drinking Water Guide →

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

NSF Certified Products → EPA Safe Drinking Water Guide →

Always look for filters certified by NSF International for the specific contaminants you want to remove.

Water Quality in LIBBY, MT (59923)

What does this mean?

Violations Detail (267 total)

Lead & Copper Levels

Violation Timeline

2025(29)

2024(104)

2023(52)

2022(47)

2021(35)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

UV Water Purifier

Nearby ZIP Codes

Check Another ZIP Code