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Public water system record

Mohegan Tribal Utility Authority

Mailing address in Uncasville, CT · Serves 31,961 people

Federal records show 1 health-based violation and 1 monitoring/reporting issue for Mohegan Tribal Utility Authority in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • 010109005
  • UNCASVILLE
  • CT
  • 31,961 served

System profile

Source water Purchased surface water
ZIP 06382
EPA system ID 010109005

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
1
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
1

Key facts

  • Mohegan Tribal Utility Authority buys its water from Norwich Public Utilities and Groton Utilities.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.0826 mg/L, federal limit 0.08 mg/L (at or just above the limit), 2020.
  • Record on file since 2011, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 34 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 0.0826 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jul 1, 2020 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Revised Total Coliform Rule
RPT
 Jan 1, 2020 Resolved

Full record since 2011

EPA's records for Mohegan Tribal Utility Authority go back to 2011. Before October 19, 2016 they list no health-based violations and 1 monitoring or reporting violation.

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

What the violations mean

Total Trihalomethanes (TTHMs)

1 incident

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Mohegan Tribal Utility Authority buys its water from Norwich Public Utilities and Groton Utilities. It lists no wells or intakes of its own.

Buys water from

Annual water quality report

Mohegan Tribal Utility 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 EPA Region 1.

Certified drinking water labs by state EPA guidance for private wells