ONECO, CT · Windham County

STERLING WATER SYSTEM Water System

Current status

1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Connecticut’s official records. Always confirm current status with Connecticut before making decisions based on this information.

System facts

System ID (PWSID): CT1360011
System type: Community Water System
Population served: 308
Service connections: 90
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring and Reporting (DBP)
—
TTHM
September 1, 2018 – August 31, 2019
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
September 1, 2018 – August 31, 2019
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2016
Unaddressed
Monitoring, Regular
—
Toxaphene
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
OXAMYL
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Simazine
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Picloram
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Dinoseb
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Aldicarb sulfone
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Aldicarb
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Atrazine
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Heptachlor epoxide
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
2,4,5-TP
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Chlordane
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Combined Uranium
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
ManMade Beta Particle and Photon Emitter
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
2,4-D
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
BHC-GAMMA
April 1, 2011 – June 30, 2011
Resolved
Monitoring, Regular
—
Methoxychlor
April 1, 2011 – June 30, 2011
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 1994 – October 12, 1994
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 1994 – October 12, 1994
Archived
Water Quality Parameter M/R
—
Lead and Copper Rule
January 1, 1994 – June 30, 1994
Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
September 1, 2018 – August 31, 2019	Monitoring and Reporting (DBP)	TTHM	—	Resolved
September 1, 2018 – August 31, 2019	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2016	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Unaddressed
April 1, 2011 – June 30, 2011	Monitoring, Regular	Toxaphene	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	OXAMYL	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Simazine	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Picloram	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Dinoseb	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Aldicarb sulfone	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Aldicarb	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Atrazine	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Heptachlor epoxide	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	2,4,5-TP	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Pentachlorophenol	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Chlordane	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Combined Uranium	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	ManMade Beta Particle and Photon Emitter	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	2,4-D	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	BHC-GAMMA	—	Resolved
April 1, 2011 – June 30, 2011	Monitoring, Regular	Methoxychlor	—	Resolved
July 1, 1994 – October 12, 1994	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
January 1, 1994 – October 12, 1994	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Archived
January 1, 1994 – June 30, 1994	Water Quality Parameter M/R	Lead and Copper Rule	—	Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

August 25, 2011State Violation/Reminder Notice36 linked violations
September 27, 1994State Public Notification received7 linked violations

Contact

COOPER, LINCOLN

860-564-2904

ONECO, CT 06373