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Public water system record

Regional Water Authority

Serves Milford, New Haven, North Haven and 9 more places, South Central Connecticut Planning Region and Naugatuck Valley Planning Region, CT · 418,900 people served

Federal records show no health-based violations and 3 monitoring/reporting issues for Regional Water Authority in the last ten years.

  • CT0930011
  • NEW HAVEN
  • CT
  • 418,900 served

System profile

Source water Surface water
ZIP 06511
EPA system ID CT0930011

Verify this system on EPA ECHO →

Health-based violations, last 10 years
0
Resolved
0
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
3

Key facts

  • Regional Water Authority draws water from 19 wells, 6 surface water intakes and 12 reservoirs.
  • Record on file since 2008, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 17 lead and 5,963 unknown out of 125,376 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

None since October 2016.

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Lead and Copper Rule
Monitoring and reporting
 Dec 30, 2020 Resolved
CARBON, TOTAL
Monitoring and reporting
 Jan 1, 2017 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Lead and Copper Rule
Monitoring and reporting
 Dec 30, 2014 Resolved

Full record since 2008

EPA's records for Regional Water Authority go back to 2008. Before October 19, 2016 they list no health-based violations and 29 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 0 1
2010 to October 18, 2016 0 28
October 19, 2016 to 2019 0 1
2020s 0 1

Where the water comes from

Regional Water Authority draws water from 19 wells, 6 surface water intakes and 12 reservoirs. It also buys water from Aquarion-Valley and Aquarion-East Derby. It also has emergency connections to Southington Water Department, CTWC - Shoreline Region-Guilford System and Wallingford Water Department. 5 other community water systems buy water from Regional Water Authority. 2 other public water systems have emergency connections to Regional Water Authority.

Buys water from

Emergency or part-time connections to

Community systems that buy water from it

Annual water quality report

Regional Water Authority must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Connecticut.

Certified drinking water labs by state EPA guidance for private wells