SHELTON, CT · Hartford County

AQUARION-PLAINVILLE REGIONAL Water System

Current status

No open violations on record as of July 4, 2026.

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): CT1100011
System type: Community Water System
Population served: 18,231
Service connections: 6,622
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
August 10, 2021 – July 6, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2021 – July 6, 2021
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – July 6, 2021
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2019 – December 31, 2021
Archived
Monitoring, Regular
—
Beryllium, Total
January 1, 2019 – December 31, 2021
Archived
Monitoring, Regular
—
Arsenic
January 1, 2019 – December 31, 2021
Archived
Monitoring, Regular
—
Cadmium
January 1, 2019 – December 31, 2021
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2016 – July 6, 2016
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2016 – March 31, 2016
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2016 – March 31, 2016
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2014 – July 3, 2014
Resolved
Monitoring and Reporting (DBP)
—
TTHM
April 1, 2014 – June 30, 2014
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
April 1, 2014 – June 30, 2014
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 2013 – February 28, 2013
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Combined Uranium
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2011 – December 31, 2013
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2010 – August 2, 2010
Resolved
Monitoring, Regular
—
ManMade Beta Particle and Photon Emitter
January 1, 2006 – March 31, 2006
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
January 1, 2006 – March 31, 2006
Resolved
Monitoring, Regular
—
ManMade Beta Particle and Photon Emitter
January 1, 2006 – March 31, 2006
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
January 1, 2006 – March 31, 2006
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 2005 – February 28, 2005
Resolved
Monitoring, Regular
—
Benzene
January 1, 1988 – March 31, 1988
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 1988 – March 31, 1988
Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
August 10, 2021 – July 6, 2021	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2021 – July 6, 2021	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2020 – July 6, 2021	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2019 – December 31, 2021	Monitoring, Regular	Antimony, Total	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Beryllium, Total	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Arsenic	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Cadmium	—	Archived
July 1, 2016 – July 6, 2016	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2014 – July 3, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2014 – June 30, 2014	Monitoring and Reporting (DBP)	TTHM	—	Resolved
April 1, 2014 – June 30, 2014	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
February 1, 2013 – February 28, 2013	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Combined Uranium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Combined Uranium	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
July 1, 2010 – August 2, 2010	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring, Regular	ManMade Beta Particle and Photon Emitter	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring, Regular	ManMade Beta Particle and Photon Emitter	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
February 1, 2005 – February 28, 2005	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1988 – March 31, 1988	Monitoring, Regular	Benzene	—	Resolved
January 1, 1988 – March 31, 1988	Monitoring, Regular	p-Dichlorobenzene	—	Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

No enforcement actions on record for this system.

Contact

ULRICH, ROBERT J.

203-926-4320

SHELTON, CT 06484