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Mystic, CT Tap Water Quality 2026

Water quality report for Mystic, CT — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Mystic's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Aquarion-Mystic PWSID: CT1370011 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 3.00 ppb, 20% of the action level and no violations are open. No PFAS was detected.

A

Mystic earns an A for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 3.00 ppb — 20% of the federal action level
PFAS tested, none detected
36 violations since 2015, 0 health-based
No violations currently open
Mystic's lead level vs. all Connecticut community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.00 ppb — 20% of the federal action level
✓ Lower lead than 12% of Connecticut utilities
Population Served
4292
~5077 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
36 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
20% of EPA action level
3.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 3.00 ppb, 20% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Consumer Confidence Rule OTHER — — 2018 Resolved
Consumer Confidence Rule OTHER — — 2018 Resolved
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2018 Resolved
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2018 Resolved
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2018 Resolved
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2018 Resolved
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2018 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2018 Resolved
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2018 Resolved
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2018 Resolved
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2018 Resolved
Benzene MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
Toluene MONITORING AND REPORTING — 1 mg/L 2018 Resolved
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2018 Resolved
Styrene MONITORING AND REPORTING — 0.1 mg/L 2018 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2018 Resolved
Nitrite MONITORING AND REPORTING — 1 mg/L 2018 Resolved
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2016–2018 Resolved
Barium MONITORING AND REPORTING — 2 mg/L 2016–2018 Resolved
Cadmium MONITORING AND REPORTING — 0.005 mg/L 2016–2018 Resolved
Chromium MONITORING AND REPORTING — 0.1 mg/L 2016–2018 Resolved
CYANIDE MONITORING AND REPORTING — 0.2 mg/L 2016–2018 Resolved
Fluoride MONITORING AND REPORTING — 4.0 mg/L 2016–2018 Resolved
Mercury MONITORING AND REPORTING — 0.002 mg/L 2016–2018 Resolved
Nickel MONITORING AND REPORTING — — 2016–2018 Resolved
Antimony, Total MONITORING AND REPORTING — 0.006 mg/L 2016–2018 Resolved
Beryllium, Total MONITORING AND REPORTING — 0.004 mg/L 2016–2018 Resolved
Thallium, Total MONITORING AND REPORTING — 0.002 mg/L 2016–2018 Resolved
Selenium MONITORING AND REPORTING — 0.05 mg/L 2016–2018 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

36 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Aquarion-Mystic
PWSID CT1370011
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 4,292
Service connections 5,077
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Mystic tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 3.00 ppb, 20% of the action level.
Does Mystic water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Mystic? ▼
Aquarion-Mystic (PWSID CT1370011). Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2025-11-06. No significant deficiencies were recorded.

What Should Mystic Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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