Public Water Partners

NEW HAVEN, CT · New Haven County

REGIONAL WATER AUTHORITY Water System

Consumer Confidence Report status

REGIONAL WATER AUTHORITY must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for REGIONAL WATER AUTHORITY.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)
CT0930011
System type
Community Water System
Population served
418,900
Service connections
115,707
Ownership
local government
Water source
surface water (rivers, lakes, or reservoirs)

REGIONAL WATER AUTHORITY is the largest community water system in Connecticut, serving 418,900 people from surface water.

As of August 1, 2026, its federal record holds 9 entries between 2015 and 2017, all of which EPA lists as closed. Nothing has been added since 2017.

All 9 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, inorganic chemicals, and the Stage 1 Disinfectants and Disinfection Byproducts Rule.

Violation history

  • Monitoring and Reporting (DBP)

    —

    CARBON, TOTAL

    January 1, 2017 – March 31, 2017

    Archived

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Nitrite

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 2015 – December 31, 2015

    Resolved

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

Enforcement actions

No enforcement actions on record for this system.

Common questions

Is REGIONAL WATER AUTHORITY required to publish a Consumer Confidence Report?

Yes. REGIONAL WATER AUTHORITY is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is REGIONAL WATER AUTHORITY’s next Consumer Confidence Report due?

REGIONAL WATER AUTHORITY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does REGIONAL WATER AUTHORITY have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for REGIONAL WATER AUTHORITY.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

BARGER, THOMAS C.

203-401-2710

NEW HAVEN, CT 06511