Water Quality in HELENA, MT (59601)

EPA violation data for public water systems serving ZIP code 59601.

387

Total Violations

Health-Based

373

Monitoring / Reporting

382

Resolved

What does this mean?

382 of 387 violations have been resolved. 14 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 373 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: 100 Population served: 18,516

Violations Detail (387 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Revised Total Coliform Rule	Health-Based	N/A	N/A	Oct 31, 2025	Active	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Oct 31, 2025	Active	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Revised Total Coliform 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	Sep 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2025	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Aug 31, 2025	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Aug 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2025	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Groundwater 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
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Groundwater 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	Feb 28, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 29, 2024	Active	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	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	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Dec 31, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Dec 31, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Dec 31, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Dec 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 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
Groundwater Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Groundwater Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jun 2, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jun 2, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jun 2, 2023	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Cardiovascular system or reproductive problems
2,4-D	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Gross Alpha, Excl. Radon and U	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Gross Alpha, Excl. Radon and U	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Gross Alpha, Excl. Radon and U	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Combined Radium (-226 and -228)	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Combined Radium (-226 and -228)	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Combined Radium (-226 and -228)	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Pentachlorophenol	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	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
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Gross Alpha, Excl. Radon and U	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Gross Alpha, Excl. Radon and U	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Gross Alpha, Excl. Radon and U	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Combined Radium (-226 and -228)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Combined Radium (-226 and -228)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Combined Radium (-226 and -228)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	Cardiovascular system or reproductive problems
Carbofuran	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	Cardiovascular system or reproductive problems
Dalapon	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Dec 31, 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
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2022	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Combined Radium (-226 and -228)	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Combined Radium (-226 and -228)	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Combined Radium (-226 and -228)	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Gross Alpha, Excl. Radon and U	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Gross Alpha, Excl. Radon and U	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Gross Alpha, Excl. Radon and U	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Cardiovascular system or reproductive problems
Picloram	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Cardiovascular system or reproductive problems
OXAMYL	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Consumer Confidence 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
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Apr 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Apr 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Apr 1, 2022	Resolved	N/A
1,2-Dichloropropane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Benzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
CHLOROBENZENE	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,2-Dichloropropane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
CHLOROBENZENE	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,2-Dichloropropane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
p-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Xylenes, Total	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Xylenes, Total	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Xylenes, Total	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
DICHLOROMETHANE	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Trichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Liver problems; increased risk of cancer
Trichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Liver problems; increased risk of cancer
Trichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Liver problems; increased risk of cancer
Vinyl chloride	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Increased risk of cancer
Vinyl chloride	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Increased risk of cancer
Vinyl chloride	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Increased risk of cancer
1,1-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,1-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Carbon tetrachloride	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Liver problems; increased risk of cancer
Carbon tetrachloride	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Liver problems; increased risk of cancer
Carbon tetrachloride	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Liver problems; increased risk of cancer
Benzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
Benzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Anemia; decrease in blood platelets; increased risk of cancer
CHLOROBENZENE	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,2,4-Trichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
cis-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
o-Dichlorobenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
trans-1,2-Dichloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,2-Dichloroethane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,1,1-Trichloroethane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Toluene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Ethylbenzene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Styrene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,1,2-Trichloroethane	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
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
1,1,2-Trichloroethane	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Tetrachloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Liver problems; increased risk of cancer
Tetrachloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Liver problems; increased risk of cancer
Tetrachloroethylene	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Liver problems; increased risk of cancer
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
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
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
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(30)

Revised Total Coliform Rule

Oct 31Active

Revised Total Coliform Rule

Oct 31Active

Lead and Copper Rule

Sep 30Resolved

Lead and Copper Rule

Sep 30Resolved

Lead and Copper Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Active

Revised Total Coliform Rule

Sep 30Active

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Sep 30Resolved

Revised Total Coliform Rule

Aug 31Resolved

Groundwater Rule

Aug 31Resolved

Groundwater Rule

Aug 31Resolved

Revised Total Coliform Rule

Aug 31Resolved

Groundwater Rule

Jul 31Resolved

Groundwater Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Groundwater Rule

Jun 30Resolved

Groundwater 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

Feb 28Resolved

Revised Total Coliform Rule

Feb 28Resolved

2024(16)

Revised Total Coliform Rule

Dec 31Resolved

Revised Total Coliform Rule

Dec 31Resolved

Revised Total Coliform Rule

Dec 31Resolved

Lead and Copper Rule

Dec 29Active

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Groundwater Rule

Jun 30Resolved

Groundwater Rule

Jun 30Resolved

Groundwater Rule

Jun 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

2023(105)

Groundwater Rule

Dec 31Resolved

Groundwater Rule

Dec 31Resolved

Groundwater Rule

Dec 31Resolved

Groundwater Rule

Dec 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

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Groundwater Rule

Jun 30Resolved

Groundwater Rule

Jun 30Resolved

Groundwater Rule

Jun 30Resolved

Lead and Copper Rule

Jun 30Resolved

Lead and Copper Rule

Jun 30Resolved

Lead and Copper Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 2Resolved

Revised Total Coliform Rule

Jun 2Resolved

Revised Total Coliform Rule

Jun 2Resolved

Chlordane

Mar 31Resolved

Toxaphene

Mar 31Resolved

HEXACHLOROBENZENE

Mar 31Resolved

HEXACHLOROBENZENE

Mar 31Resolved

HEXACHLOROBENZENE

Mar 31Resolved

Simazine

Mar 31Resolved

Simazine

Mar 31Resolved

Simazine

Mar 31Resolved

Toxaphene

Mar 31Resolved

Toxaphene

Mar 31Resolved

Chlordane

Mar 31Resolved

Chlordane

Mar 31Resolved

Atrazine

Mar 31Resolved

Atrazine

Mar 31Resolved

Atrazine

Mar 31Resolved

2,4-D

Mar 31Resolved

2,4-D

Mar 31Resolved

2,4-D

Mar 31Resolved

Heptachlor epoxide

Mar 31Resolved

Heptachlor epoxide

Mar 31Resolved

Heptachlor epoxide

Mar 31Resolved

Carbofuran

Mar 31Resolved

Carbofuran

Mar 31Resolved

Carbofuran

Mar 31Resolved

Dinoseb

Mar 31Resolved

Dinoseb

Mar 31Resolved

Dinoseb

Mar 31Resolved

Picloram

Mar 31Resolved

Picloram

Mar 31Resolved

Picloram

Mar 31Resolved

Di(2-ethylhexyl) phthalate

Mar 31Resolved

Di(2-ethylhexyl) phthalate

Mar 31Resolved

Di(2-ethylhexyl) phthalate

Mar 31Resolved

OXAMYL

Mar 31Resolved

OXAMYL

Mar 31Resolved

OXAMYL

Mar 31Resolved

Di(2-ethylhexyl) adipate

Mar 31Resolved

Di(2-ethylhexyl) adipate

Mar 31Resolved

Di(2-ethylhexyl) adipate

Mar 31Resolved

Methoxychlor

Mar 31Resolved

Methoxychlor

Mar 31Resolved

Methoxychlor

Mar 31Resolved

BHC-GAMMA

Mar 31Resolved

BHC-GAMMA

Mar 31Resolved

BHC-GAMMA

Mar 31Resolved

Gross Alpha, Excl. Radon and U

Mar 31Resolved

Gross Alpha, Excl. Radon and U

Mar 31Resolved

Gross Alpha, Excl. Radon and U

Mar 31Resolved

Combined Radium (-226 and -228)

Mar 31Resolved

Combined Radium (-226 and -228)

Mar 31Resolved

Combined Radium (-226 and -228)

Mar 31Resolved

LASSO

Mar 31Resolved

2,4,5-TP

Mar 31Resolved

Endrin

Mar 31Resolved

LASSO

Mar 31Resolved

LASSO

Mar 31Resolved

Dalapon

Mar 31Resolved

Dalapon

Mar 31Resolved

Dalapon

Mar 31Resolved

Benzo(a)pyrene

Mar 31Resolved

Benzo(a)pyrene

Mar 31Resolved

Benzo(a)pyrene

Mar 31Resolved

Heptachlor

Mar 31Resolved

Heptachlor

Mar 31Resolved

Heptachlor

Mar 31Resolved

Pentachlorophenol

Mar 31Resolved

Pentachlorophenol

Mar 31Resolved

Endrin

Mar 31Resolved

Endrin

Mar 31Resolved

Hexachlorocyclopentadiene

Mar 31Resolved

Hexachlorocyclopentadiene

Mar 31Resolved

Hexachlorocyclopentadiene

Mar 31Resolved

2,4,5-TP

Mar 31Resolved

2,4,5-TP

Mar 31Resolved

Pentachlorophenol

Mar 31Resolved

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

2022(155)

Total Haloacetic Acids (HAA5)

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

TTHM

Dec 31Resolved

TTHM

Dec 31Resolved

TTHM

Dec 31Resolved

TTHM

Dec 31Resolved

Pentachlorophenol

Dec 31Resolved

LASSO

Dec 31Resolved

Toxaphene

Dec 31Resolved

LASSO

Dec 31Resolved

Pentachlorophenol

Dec 31Resolved

Pentachlorophenol

Dec 31Resolved

2,4,5-TP

Dec 31Resolved

2,4,5-TP

Dec 31Resolved

2,4,5-TP

Dec 31Resolved

Toxaphene

Dec 31Resolved

Toxaphene

Dec 31Resolved

LASSO

Dec 31Resolved

Endrin

Dec 31Resolved

Endrin

Dec 31Resolved

Endrin

Dec 31Resolved

BHC-GAMMA

Dec 31Resolved

BHC-GAMMA

Dec 31Resolved

BHC-GAMMA

Dec 31Resolved

Methoxychlor

Dec 31Resolved

Methoxychlor

Dec 31Resolved

Methoxychlor

Dec 31Resolved

Di(2-ethylhexyl) adipate

Dec 31Resolved

Di(2-ethylhexyl) adipate

Dec 31Resolved

Di(2-ethylhexyl) adipate

Dec 31Resolved

OXAMYL

Dec 31Resolved

OXAMYL

Dec 31Resolved

OXAMYL

Dec 31Resolved

Simazine

Dec 31Resolved

Simazine

Dec 31Resolved

Simazine

Dec 31Resolved

Picloram

Dec 31Resolved

Picloram

Dec 31Resolved

Picloram

Dec 31Resolved

Hexachlorocyclopentadiene

Dec 31Resolved

Hexachlorocyclopentadiene

Dec 31Resolved

Hexachlorocyclopentadiene

Dec 31Resolved

Heptachlor

Dec 31Resolved

Heptachlor

Dec 31Resolved

Heptachlor

Dec 31Resolved

Heptachlor epoxide

Dec 31Resolved

Heptachlor epoxide

Dec 31Resolved

Heptachlor epoxide

Dec 31Resolved

2,4-D

Dec 31Resolved

2,4-D

Dec 31Resolved

2,4-D

Dec 31Resolved

Benzo(a)pyrene

Dec 31Resolved

Benzo(a)pyrene

Dec 31Resolved

Benzo(a)pyrene

Dec 31Resolved

Chlordane

Dec 31Resolved

Chlordane

Dec 31Resolved

Chlordane

Dec 31Resolved

Gross Alpha, Excl. Radon and U

Dec 31Resolved

Gross Alpha, Excl. Radon and U

Dec 31Resolved

Gross Alpha, Excl. Radon and U

Dec 31Resolved

Combined Radium (-226 and -228)

Dec 31Resolved

Combined Radium (-226 and -228)

Dec 31Resolved

Combined Radium (-226 and -228)

Dec 31Resolved

Dinoseb

Dec 31Resolved

Dalapon

Dec 31Resolved

Di(2-ethylhexyl) phthalate

Dec 31Resolved

Di(2-ethylhexyl) phthalate

Dec 31Resolved

Dalapon

Dec 31Resolved

Di(2-ethylhexyl) phthalate

Dec 31Resolved

HEXACHLOROBENZENE

Dec 31Resolved

HEXACHLOROBENZENE

Dec 31Resolved

HEXACHLOROBENZENE

Dec 31Resolved

Atrazine

Dec 31Resolved

Atrazine

Dec 31Resolved

Carbofuran

Dec 31Resolved

Carbofuran

Dec 31Resolved

Carbofuran

Dec 31Resolved

Atrazine

Dec 31Resolved

Dalapon

Dec 31Resolved

Dinoseb

Dec 31Resolved

Dinoseb

Dec 31Resolved

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

Carbofuran

Sep 30Resolved

Carbofuran

Sep 30Resolved

BHC-GAMMA

Sep 30Resolved

BHC-GAMMA

Sep 30Resolved

HEXACHLOROBENZENE

Sep 30Resolved

HEXACHLOROBENZENE

Sep 30Resolved

Benzo(a)pyrene

Sep 30Resolved

Benzo(a)pyrene

Sep 30Resolved

Combined Radium (-226 and -228)

Sep 30Resolved

Combined Radium (-226 and -228)

Sep 30Resolved

Combined Radium (-226 and -228)

Sep 30Resolved

Endrin

Sep 30Resolved

Endrin

Sep 30Resolved

Toxaphene

Sep 30Resolved

Toxaphene

Sep 30Resolved

Dalapon

Sep 30Resolved

Dalapon

Sep 30Resolved

Di(2-ethylhexyl) adipate

Sep 30Resolved

Di(2-ethylhexyl) adipate

Sep 30Resolved

Simazine

Sep 30Resolved

Simazine

Sep 30Resolved

Di(2-ethylhexyl) phthalate

Sep 30Resolved

Di(2-ethylhexyl) phthalate

Sep 30Resolved

Dinoseb

Sep 30Resolved

Dinoseb

Sep 30Resolved

Hexachlorocyclopentadiene

Sep 30Resolved

Hexachlorocyclopentadiene

Sep 30Resolved

LASSO

Sep 30Resolved

LASSO

Sep 30Resolved

Heptachlor

Sep 30Resolved

Heptachlor

Sep 30Resolved

Heptachlor epoxide

Sep 30Resolved

Heptachlor epoxide

Sep 30Resolved

2,4-D

Sep 30Resolved

2,4-D

Sep 30Resolved

Pentachlorophenol

Sep 30Resolved

Pentachlorophenol

Sep 30Resolved

Chlordane

Sep 30Resolved

Chlordane

Sep 30Resolved

Gross Alpha, Excl. Radon and U

Sep 30Resolved

Gross Alpha, Excl. Radon and U

Sep 30Resolved

Gross Alpha, Excl. Radon and U

Sep 30Resolved

Atrazine

Sep 30Resolved

Picloram

Sep 30Resolved

Picloram

Sep 30Resolved

Atrazine

Sep 30Resolved

OXAMYL

Sep 30Resolved

OXAMYL

Sep 30Resolved

Methoxychlor

Sep 30Resolved

Methoxychlor

Sep 30Resolved

2,4,5-TP

Sep 30Resolved

2,4,5-TP

Sep 30Resolved

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Aug 31Resolved

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

Revised Total Coliform Rule

May 1Resolved

Revised Total Coliform Rule

May 1Resolved

Revised Total Coliform Rule

May 1Resolved

Revised Total Coliform Rule

Apr 1Resolved

Revised Total Coliform Rule

Apr 1Resolved

Revised Total Coliform Rule

Apr 1Resolved

2021(81)

1,2-Dichloropropane

Dec 31Resolved

Benzene

Dec 31Resolved

CHLOROBENZENE

Dec 31Resolved

1,2-Dichloropropane

Dec 31Resolved

CHLOROBENZENE

Dec 31Resolved

1,1-Dichloroethylene

Dec 31Resolved

1,2-Dichloropropane

Dec 31Resolved

p-Dichlorobenzene

Dec 31Resolved

p-Dichlorobenzene

Dec 31Resolved

p-Dichlorobenzene

Dec 31Resolved

Xylenes, Total

Dec 31Resolved

Xylenes, Total

Dec 31Resolved

Xylenes, Total

Dec 31Resolved

DICHLOROMETHANE

Dec 31Resolved

DICHLOROMETHANE

Dec 31Resolved

DICHLOROMETHANE

Dec 31Resolved

Trichloroethylene

Dec 31Resolved

Trichloroethylene

Dec 31Resolved

Trichloroethylene

Dec 31Resolved

Vinyl chloride

Dec 31Resolved

Vinyl chloride

Dec 31Resolved

Vinyl chloride

Dec 31Resolved

1,1-Dichloroethylene

Dec 31Resolved

1,1-Dichloroethylene

Dec 31Resolved

Carbon tetrachloride

Dec 31Resolved

Carbon tetrachloride

Dec 31Resolved

Carbon tetrachloride

Dec 31Resolved

Benzene

Dec 31Resolved

Benzene

Dec 31Resolved

CHLOROBENZENE

Dec 31Resolved

1,2,4-Trichlorobenzene

Dec 31Resolved

1,2,4-Trichlorobenzene

Dec 31Resolved

1,2,4-Trichlorobenzene

Dec 31Resolved

cis-1,2-Dichloroethylene

Dec 31Resolved

cis-1,2-Dichloroethylene

Dec 31Resolved

cis-1,2-Dichloroethylene

Dec 31Resolved

o-Dichlorobenzene

Dec 31Resolved

o-Dichlorobenzene

Dec 31Resolved

o-Dichlorobenzene

Dec 31Resolved

trans-1,2-Dichloroethylene

Dec 31Resolved

trans-1,2-Dichloroethylene

Dec 31Resolved

trans-1,2-Dichloroethylene

Dec 31Resolved

1,2-Dichloroethane

Dec 31Resolved

1,2-Dichloroethane

Dec 31Resolved

1,2-Dichloroethane

Dec 31Resolved

1,1,1-Trichloroethane

Dec 31Resolved

1,1,1-Trichloroethane

Dec 31Resolved

1,1,1-Trichloroethane

Dec 31Resolved

Toluene

Dec 31Resolved

Toluene

Dec 31Resolved

Toluene

Dec 31Resolved

Ethylbenzene

Dec 31Resolved

Ethylbenzene

Dec 31Resolved

Ethylbenzene

Dec 31Resolved

Styrene

Dec 31Resolved

Styrene

Dec 31Resolved

Styrene

Dec 31Resolved

1,1,2-Trichloroethane

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

1,1,2-Trichloroethane

Dec 31Resolved

1,1,2-Trichloroethane

Dec 31Resolved

Tetrachloroethylene

Dec 31Resolved

Tetrachloroethylene

Dec 31Resolved

Tetrachloroethylene

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Nitrate-Nitrite

Dec 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

May 31Resolved

Revised Total Coliform Rule

May 31Resolved

Revised Total Coliform Rule

May 31Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

How Does This Compare?

HELENA (59601) has 387 recorded violations, including 14 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

NSF Certified Products → EPA Safe Drinking Water Guide →

Activated Carbon Filter

Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.

Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor

Look for:NSF/ANSI 42 & 53 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 HELENA, MT (59601)

What does this mean?

Violations Detail (387 total)

Lead & Copper Levels

Violation Timeline

2025(30)

2024(16)

2023(105)

2022(155)

2021(81)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

Activated Carbon Filter

UV Water Purifier

Nearby ZIP Codes

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