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Public water system record

Norwich Public Utilities

Serves Norwich, Southeastern Connecticut Planning Region, CT · 36,163 people served

Federal records show 6 health-based violations and 3 monitoring/reporting issues for Norwich Public Utilities in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • CT1040011
  • NORWICH
  • CT
  • 36,163 served

System profile

Source water Surface water
ZIP 06360
EPA system ID CT1040011

Verify this system on EPA ECHO →

Health-based violations, last 10 years
6
Resolved
4
Unresolved
0
Archived by EPA
2
Any acute record
No
Monitoring issues, last 10 years
3

Key facts

  • Norwich Public Utilities draws water from 1 well, 2 surface water intakes and 2 reservoirs (2 of them for emergency, seasonal or other part-time use).
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2018.
  • Most recent formal enforcement: compliance order (no penalty) by Connecticut, July 2017.
  • Record on file since 2004, with 7 health-based violations before October 19, 2016.
  • Lead pipe inventory: 12 lead and 176 unknown out of 11,089 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.

Contaminant Rule family Start date Status Acute
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Apr 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jan 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
 220 Jan 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Oct 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2017 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Consumer Confidence Rule
OTHER
 Jul 1, 2020 Resolved
Consumer Confidence Rule
OTHER
 Aug 10, 2017 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2017 Resolved

Full record since 2004

EPA's records for Norwich Public Utilities go back to 2004. Before October 19, 2016 they list 7 health-based violations (7 resolved) and 12 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 0 10
2010 to October 18, 2016 7 2
October 19, 2016 to 2019 6 2
2020s 0 1

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began July 2016, Resolved.

Show all 7 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jul 1, 2016 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 Apr 1, 2016 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 Jan 1, 2016 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 Apr 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jan 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Oct 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jul 1, 2014 Resolved

Enforcement actions

Connecticut regulators took 1 formal enforcement action against Norwich Public Utilities in 2017. The most recent was a compliance order (no penalty) in July 2017.

Date By Action Violations covered
Jul 11, 2017 Connecticut Compliance order (no penalty) 13 violations (13 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)

What the violations mean

Total Trihalomethanes (TTHMs)

5 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Haloacetic Acids (HAA5)

1 incident

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Where the water comes from

Norwich Public Utilities draws water from 1 well, 2 surface water intakes and 2 reservoirs (2 of them for emergency, seasonal or other part-time use). It also has an emergency connection to Montville Water Supply. 1 other community water system buys water from Norwich Public Utilities. 1 other public water system has an emergency connection to Norwich Public Utilities.

Emergency or part-time connections to

Community systems that buy water from it

Annual water quality report

Norwich Public Utilities 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