WaterQ

Mashantucket Pequot Water System

PWSID: 010106001

A Excellent

Score 94/100 — Excellent

Data Updated: March 2026 Source: EPA SDWIS
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System Information

Type
Community Water System
Water Source
Ground Water (Under Surface Influence)
Population Served
22,171
Owner Type
N
Status
Active
Population Served
22,171
System Type
Community Water System
Water Source
Ground Water (Under Surface Influence)
Violation Status
No Violations
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Water Quality Test Results

Contaminant Detected EPA Limit (MCL) Status
Lead (90th percentile) 2025-12-31 0.001 mg/L 0.015 mg/L Compliant

Contaminant Trends

Lead (90th percentile) Trend

MCL: 0.015 mg/L
Loading Chart...

Violation History

2025-07-01
Resolved - Minor

Other

Other - Rule 420

Resolved: 2025-09-26

2025-07-01
Resolved - Minor

Other

Other - Rule 420

Resolved: 2025-10-02

2025-07-01
Resolved - Minor

Other

Other - Rule 420

Resolved: 2025-10-02

2024-07-01
Resolved - Minor

Other

Other - Rule 420

Resolved: 2025-10-02

2024-07-01
Resolved - Minor

Other

Other - Rule 420

Resolved: 2025-09-26

Frequently Asked Questions

Is Mashantucket Pequot Water System water safe to drink?
Mashantucket Pequot Water System in Mashantucket, CT has a water quality score of 94/100 (Excellent). There are currently 1 unresolved violation(s).
How many people does Mashantucket Pequot Water System serve?
Mashantucket Pequot Water System provides drinking water to approximately 22,171 people in the Mashantucket, CT area.
What contaminants have been found in Mashantucket Pequot Water System water?
No contaminants have exceeded EPA limits in recent tests. Visit the full report for detailed test results.
How many violations does Mashantucket Pequot Water System have?
Mashantucket Pequot Water System has a total of 180 violation(s) on record. 1 remain unresolved.
Where does Mashantucket Pequot Water System get its water?
Mashantucket Pequot Water System uses ground water under the direct influence of surface water as its primary water source.

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Nearby Systems in CT

Regional Water Authority

A
CT0930011 New Haven, CT
418,900 served 1 violation

Metropolitan District Commission

A
CT0640011 Hartford, CT
390,887 served

Aquarion-Eastern Fairfield County

A
CT0150011 Shelton, CT
351,756 served 5 violations

Aquarion-Stamford

B
CT1350011 Shelton, CT
119,214 served

Waterbury Water Department

C
CT1510011 Waterbury, CT
107,271 served

Filter Your Water

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