Water Quality in NIANTIC, CT (06357)

EPA violation data for public water systems serving ZIP code 06357.

262

Total Violations

Health-Based

260

Monitoring / Reporting

255

Resolved

What does this mean?

255 of 262 violations have been resolved. 2 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 260 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: 17 Population served: 15,724

Violations Detail (262 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Public Notice	Monitoring	N/A	N/A	Jan 3, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jan 3, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jan 3, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jan 3, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jan 3, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jan 3, 2025	Resolved	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 2024	Active	N/A
LEAD AND COPPER RULE REVISIONS	Health-Based	N/A	N/A	Oct 16, 2024	Active	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 2024	Active	N/A
LEAD AND COPPER RULE REVISIONS	Health-Based	N/A	N/A	Oct 16, 2024	Active	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2024	Active	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2024	Active	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2024	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	Cardiovascular system or reproductive problems
Glyphosate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Glyphosate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Heptachlor epoxide	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Glyphosate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Glyphosate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Simazine	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Endrin	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
BHC-GAMMA	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Diquat	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Diquat	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Diquat	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Diquat	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) adipate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Hexachlorocyclopentadiene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb sulfoxide	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb sulfoxide	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb sulfoxide	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb sulfoxide	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Carbofuran	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Heptachlor	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Benzo(a)pyrene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Pentachlorophenol	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Total Polychlorinated Biphenyls (PCB)	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Total Polychlorinated Biphenyls (PCB)	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Total Polychlorinated Biphenyls (PCB)	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Total Polychlorinated Biphenyls (PCB)	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb sulfone	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb sulfone	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb sulfone	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Aldicarb sulfone	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
ETHYLENE DIBROMIDE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
ETHYLENE DIBROMIDE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
ETHYLENE DIBROMIDE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
HEXACHLOROBENZENE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Picloram	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Methoxychlor	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
2,4,5-TP	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Toxaphene	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
ETHYLENE DIBROMIDE	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) phthalate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Di(2-ethylhexyl) phthalate	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
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 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
OXAMYL	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Aldicarb	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
OXAMYL	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
OXAMYL	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
Pentachlorophenol	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Aldicarb	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
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
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
Glyphosate	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Glyphosate	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Glyphosate	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	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
Atrazine	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	Cardiovascular system or reproductive problems
1,2-DIBROMO-3-CHLOROPROPANE	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
1,2-DIBROMO-3-CHLOROPROPANE	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Dinoseb	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Aldicarb	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
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
Dalapon	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Dalapon	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Dalapon	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
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
Di(2-ethylhexyl) phthalate	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
Aldicarb sulfoxide	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Aldicarb sulfoxide	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Aldicarb sulfoxide	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Aldicarb sulfone	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Aldicarb sulfone	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Aldicarb sulfone	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
Carbofuran	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
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
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
Total Polychlorinated Biphenyls (PCB)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Total Polychlorinated Biphenyls (PCB)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Total Polychlorinated Biphenyls (PCB)	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
ETHYLENE DIBROMIDE	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
ETHYLENE DIBROMIDE	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
ETHYLENE DIBROMIDE	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Diquat	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Diquat	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Diquat	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
Toxaphene	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
LASSO	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
LASSO	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Chlordane	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Aug 9, 2022	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Aug 9, 2022	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Aug 9, 2021	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Aug 9, 2021	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Aug 9, 2021	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Aug 9, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(6)

Public Notice

Jan 3Resolved

Public Notice

Jan 3Resolved

Public Notice

Jan 3Resolved

Public Notice

Jan 3Resolved

Public Notice

Jan 3Resolved

Public Notice

Jan 3Resolved

2024(151)

LEAD AND COPPER RULE REVISIONS

Oct 16Active

LEAD AND COPPER RULE REVISIONS

Oct 16Active

LEAD AND COPPER RULE REVISIONS

Oct 16Active

LEAD AND COPPER RULE REVISIONS

Oct 16Active

Total Haloacetic Acids (HAA5)

Sep 30Resolved

Total Haloacetic Acids (HAA5)

Sep 30Resolved

Total Haloacetic Acids (HAA5)

Sep 30Resolved

Total Haloacetic Acids (HAA5)

Sep 30Resolved

TTHM

Sep 30Resolved

TTHM

Sep 30Resolved

TTHM

Sep 30Resolved

TTHM

Sep 30Resolved

Lead and Copper Rule

Sep 30Active

Lead and Copper Rule

Sep 30Active

Lead and Copper Rule

Sep 30Active

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Aug 31Resolved

Revised Total Coliform Rule

Aug 31Resolved

Simazine

Jun 30Resolved

Simazine

Jun 30Resolved

Simazine

Jun 30Resolved

Atrazine

Jun 30Resolved

Atrazine

Jun 30Resolved

Atrazine

Jun 30Resolved

Atrazine

Jun 30Resolved

Glyphosate

Jun 30Resolved

Glyphosate

Jun 30Resolved

Dalapon

Jun 30Resolved

Dalapon

Jun 30Resolved

Dalapon

Jun 30Resolved

Dalapon

Jun 30Resolved

Heptachlor epoxide

Jun 30Resolved

Heptachlor epoxide

Jun 30Resolved

Heptachlor epoxide

Jun 30Resolved

Heptachlor epoxide

Jun 30Resolved

Glyphosate

Jun 30Resolved

Glyphosate

Jun 30Resolved

Simazine

Jun 30Resolved

2,4-D

Jun 30Resolved

2,4-D

Jun 30Resolved

2,4-D

Jun 30Resolved

2,4-D

Jun 30Resolved

Endrin

Jun 30Resolved

Endrin

Jun 30Resolved

Endrin

Jun 30Resolved

Endrin

Jun 30Resolved

BHC-GAMMA

Jun 30Resolved

BHC-GAMMA

Jun 30Resolved

BHC-GAMMA

Jun 30Resolved

BHC-GAMMA

Jun 30Resolved

Diquat

Jun 30Resolved

Diquat

Jun 30Resolved

Diquat

Jun 30Resolved

Diquat

Jun 30Resolved

Di(2-ethylhexyl) adipate

Jun 30Resolved

Di(2-ethylhexyl) adipate

Jun 30Resolved

Di(2-ethylhexyl) adipate

Jun 30Resolved

Di(2-ethylhexyl) adipate

Jun 30Resolved

OXAMYL

Jun 30Resolved

OXAMYL

Jun 30Resolved

OXAMYL

Jun 30Resolved

OXAMYL

Jun 30Resolved

Di(2-ethylhexyl) phthalate

Jun 30Resolved

Di(2-ethylhexyl) phthalate

Jun 30Resolved

Di(2-ethylhexyl) phthalate

Jun 30Resolved

Di(2-ethylhexyl) phthalate

Jun 30Resolved

Dinoseb

Jun 30Resolved

Dinoseb

Jun 30Resolved

Dinoseb

Jun 30Resolved

Dinoseb

Jun 30Resolved

Hexachlorocyclopentadiene

Jun 30Resolved

Hexachlorocyclopentadiene

Jun 30Resolved

Hexachlorocyclopentadiene

Jun 30Resolved

Hexachlorocyclopentadiene

Jun 30Resolved

Aldicarb sulfoxide

Jun 30Resolved

Aldicarb sulfoxide

Jun 30Resolved

Aldicarb sulfoxide

Jun 30Resolved

Aldicarb sulfoxide

Jun 30Resolved

Carbofuran

Jun 30Resolved

Carbofuran

Jun 30Resolved

Carbofuran

Jun 30Resolved

Carbofuran

Jun 30Resolved

Aldicarb

Jun 30Resolved

Aldicarb

Jun 30Resolved

Aldicarb

Jun 30Resolved

Aldicarb

Jun 30Resolved

LASSO

Jun 30Resolved

LASSO

Jun 30Resolved

LASSO

Jun 30Resolved

LASSO

Jun 30Resolved

Heptachlor

Jun 30Resolved

Heptachlor

Jun 30Resolved

Heptachlor

Jun 30Resolved

Heptachlor

Jun 30Resolved

Benzo(a)pyrene

Jun 30Resolved

Benzo(a)pyrene

Jun 30Resolved

Benzo(a)pyrene

Jun 30Resolved

Benzo(a)pyrene

Jun 30Resolved

Pentachlorophenol

Jun 30Resolved

Pentachlorophenol

Jun 30Resolved

Pentachlorophenol

Jun 30Resolved

Pentachlorophenol

Jun 30Resolved

Total Polychlorinated Biphenyls (PCB)

Jun 30Resolved

Total Polychlorinated Biphenyls (PCB)

Jun 30Resolved

Total Polychlorinated Biphenyls (PCB)

Jun 30Resolved

Total Polychlorinated Biphenyls (PCB)

Jun 30Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Jun 30Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Jun 30Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Jun 30Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Jun 30Resolved

Chlordane

Jun 30Resolved

Chlordane

Jun 30Resolved

Chlordane

Jun 30Resolved

Chlordane

Jun 30Resolved

Picloram

Jun 30Resolved

Toxaphene

Jun 30Resolved

Aldicarb sulfone

Jun 30Resolved

Aldicarb sulfone

Jun 30Resolved

Aldicarb sulfone

Jun 30Resolved

Aldicarb sulfone

Jun 30Resolved

ETHYLENE DIBROMIDE

Jun 30Resolved

ETHYLENE DIBROMIDE

Jun 30Resolved

ETHYLENE DIBROMIDE

Jun 30Resolved

HEXACHLOROBENZENE

Jun 30Resolved

HEXACHLOROBENZENE

Jun 30Resolved

HEXACHLOROBENZENE

Jun 30Resolved

HEXACHLOROBENZENE

Jun 30Resolved

Picloram

Jun 30Resolved

Picloram

Jun 30Resolved

Toxaphene

Jun 30Resolved

Picloram

Jun 30Resolved

Methoxychlor

Jun 30Resolved

Methoxychlor

Jun 30Resolved

Methoxychlor

Jun 30Resolved

Methoxychlor

Jun 30Resolved

2,4,5-TP

Jun 30Resolved

2,4,5-TP

Jun 30Resolved

2,4,5-TP

Jun 30Resolved

2,4,5-TP

Jun 30Resolved

Toxaphene

Jun 30Resolved

Toxaphene

Jun 30Resolved

ETHYLENE DIBROMIDE

Jun 30Resolved

Di(2-ethylhexyl) phthalate

Jun 30Resolved

Di(2-ethylhexyl) phthalate

Jun 30Resolved

Di(2-ethylhexyl) phthalate

Jun 30Resolved

Di(2-ethylhexyl) phthalate

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

Revised Total Coliform Rule

Jun 30Resolved

2022(95)

OXAMYL

Dec 31Resolved

Dinoseb

Dec 31Resolved

Aldicarb

Dec 31Resolved

OXAMYL

Dec 31Resolved

Dinoseb

Dec 31Resolved

OXAMYL

Dec 31Resolved

Pentachlorophenol

Dec 31Resolved

Pentachlorophenol

Dec 31Resolved

Pentachlorophenol

Dec 31Resolved

Aldicarb

Dec 31Resolved

2,4,5-TP

Dec 31Resolved

2,4,5-TP

Dec 31Resolved

2,4,5-TP

Dec 31Resolved

Di(2-ethylhexyl) adipate

Dec 31Resolved

Di(2-ethylhexyl) adipate

Dec 31Resolved

Di(2-ethylhexyl) adipate

Dec 31Resolved

BHC-GAMMA

Dec 31Resolved

BHC-GAMMA

Dec 31Resolved

BHC-GAMMA

Dec 31Resolved

Glyphosate

Dec 31Resolved

Glyphosate

Dec 31Resolved

Glyphosate

Dec 31Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Dec 31Resolved

Atrazine

Dec 31Resolved

Atrazine

Dec 31Resolved

Atrazine

Dec 31Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Dec 31Resolved

1,2-DIBROMO-3-CHLOROPROPANE

Dec 31Resolved

Dinoseb

Dec 31Resolved

Aldicarb

Dec 31Resolved

Endrin

Dec 31Resolved

Endrin

Dec 31Resolved

Endrin

Dec 31Resolved

Methoxychlor

Dec 31Resolved

Methoxychlor

Dec 31Resolved

Methoxychlor

Dec 31Resolved

Dalapon

Dec 31Resolved

Dalapon

Dec 31Resolved

Dalapon

Dec 31Resolved

Simazine

Dec 31Resolved

Simazine

Dec 31Resolved

Simazine

Dec 31Resolved

Di(2-ethylhexyl) phthalate

Dec 31Resolved

Di(2-ethylhexyl) phthalate

Dec 31Resolved

Di(2-ethylhexyl) phthalate

Dec 31Resolved

Picloram

Dec 31Resolved

Picloram

Dec 31Resolved

Picloram

Dec 31Resolved

Hexachlorocyclopentadiene

Dec 31Resolved

Hexachlorocyclopentadiene

Dec 31Resolved

Hexachlorocyclopentadiene

Dec 31Resolved

Aldicarb sulfoxide

Dec 31Resolved

Aldicarb sulfoxide

Dec 31Resolved

Aldicarb sulfoxide

Dec 31Resolved

Aldicarb sulfone

Dec 31Resolved

Aldicarb sulfone

Dec 31Resolved

Aldicarb sulfone

Dec 31Resolved

Carbofuran

Dec 31Resolved

Carbofuran

Dec 31Resolved

Carbofuran

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

HEXACHLOROBENZENE

Dec 31Resolved

HEXACHLOROBENZENE

Dec 31Resolved

HEXACHLOROBENZENE

Dec 31Resolved

Benzo(a)pyrene

Dec 31Resolved

Benzo(a)pyrene

Dec 31Resolved

Benzo(a)pyrene

Dec 31Resolved

Total Polychlorinated Biphenyls (PCB)

Dec 31Resolved

Total Polychlorinated Biphenyls (PCB)

Dec 31Resolved

Total Polychlorinated Biphenyls (PCB)

Dec 31Resolved

ETHYLENE DIBROMIDE

Dec 31Resolved

ETHYLENE DIBROMIDE

Dec 31Resolved

ETHYLENE DIBROMIDE

Dec 31Resolved

Diquat

Dec 31Resolved

Diquat

Dec 31Resolved

Diquat

Dec 31Resolved

Chlordane

Dec 31Resolved

Chlordane

Dec 31Resolved

Toxaphene

Dec 31Resolved

Toxaphene

Dec 31Resolved

Toxaphene

Dec 31Resolved

LASSO

Dec 31Resolved

LASSO

Dec 31Resolved

LASSO

Dec 31Resolved

Chlordane

Dec 31Resolved

Consumer Confidence Rule

Aug 9Resolved

Consumer Confidence Rule

Aug 9Resolved

How Does This Compare?

NIANTIC (06357) has 262 recorded violations, including 2 health-based. 7 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 NIANTIC, CT (06357)

What does this mean?

Violations Detail (262 total)

Lead & Copper Levels

Violation Timeline

2025(6)

2024(151)

2023(6)

2022(95)

2021(4)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

Activated Carbon Filter

UV Water Purifier

Nearby ZIP Codes

Check Another ZIP Code