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Wallingford, CT Tap Water Quality 2026

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

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

Main Utility: Wallingford Water Department PWSID: CT1480011 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead was not detected and no violations are open. PFAS was sampled but not enough times for a compliance determination.

B

Wallingford earns a B for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: not detected
PFAS sampled, too few results to judge
53 violations since 2015, 0 health-based
No violations currently open
Wallingford's lead level vs. all Connecticut community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of Connecticut utilities
Population Served
41177
~13204 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
53 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Consumer Confidence Rule OTHER — — 2024 Resolved
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2024 Resolved
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2024 Resolved
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2024 Resolved
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2024 Resolved
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2024 Resolved
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2024 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2024 Resolved
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2024 Resolved
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2024 Resolved
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2024 Resolved
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2024 Resolved
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2024 Resolved
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2024 Resolved
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2024 Resolved
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2024 Resolved
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2024 Resolved
Benzene MONITORING AND REPORTING — 0.005 mg/L 2024 Resolved
Toluene MONITORING AND REPORTING — 1 mg/L 2024 Resolved
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2024 Resolved
Styrene MONITORING AND REPORTING — 0.1 mg/L 2024 Resolved
Consumer Confidence Rule OTHER — — 2023 Resolved
Endrin MONITORING AND REPORTING — 0.002 mg/L 2017–2019 Archived
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2017–2019 Archived
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2017–2019 Archived
Toxaphene MONITORING AND REPORTING — 0.003 mg/L 2017–2019 Archived
Dalapon MONITORING AND REPORTING — 0.2 mg/L 2017–2019 Archived
Diquat MONITORING AND REPORTING — 0.02 mg/L 2017–2019 Archived
Glyphosate MONITORING AND REPORTING — 0.7 mg/L 2017–2019 Archived
Di(2-ethylhexyl) adipate MONITORING AND REPORTING — 0.4 mg/L 2017–2019 Archived
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2017–2019 Archived
Simazine MONITORING AND REPORTING — 0.004 mg/L 2017–2019 Archived
Di(2-ethylhexyl) phthalate MONITORING AND REPORTING — 0.006 mg/L 2017–2019 Archived
Picloram MONITORING AND REPORTING — 0.5 mg/L 2017–2019 Archived
Dinoseb MONITORING AND REPORTING — 0.007 mg/L 2017–2019 Archived
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2017–2019 Archived
Aldicarb sulfoxide MONITORING AND REPORTING — — 2017–2019 Archived
Aldicarb sulfone MONITORING AND REPORTING — — 2017–2019 Archived
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2017–2019 Archived
Aldicarb MONITORING AND REPORTING — — 2017–2019 Archived
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2017–2019 Archived
LASSO MONITORING AND REPORTING — — 2017–2019 Archived
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2017–2019 Archived
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2017–2019 Archived
2,4-D MONITORING AND REPORTING — 0.07 mg/L 2017–2019 Archived
2,4,5-TP MONITORING AND REPORTING — 0.05 mg/L 2017–2019 Archived
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2017–2019 Archived
Benzo(a)pyrene MONITORING AND REPORTING — 0.0002 mg/L 2017–2019 Archived
Pentachlorophenol MONITORING AND REPORTING — 0.001 mg/L 2017–2019 Archived
Total Polychlorinated Biphenyls (PCB) MONITORING AND REPORTING — 0.0005 mg/L 2017–2019 Archived
1,2-DIBROMO-3-CHLOROPROPANE MONITORING AND REPORTING — 0.0002 mg/L 2017–2019 Archived
ETHYLENE DIBROMIDE MONITORING AND REPORTING — 0.00005 mg/L 2017–2019 Archived
Chlordane MONITORING AND REPORTING — 0.002 mg/L 2017–2019 Archived
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

53 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 Wallingford Water Department
PWSID CT1480011
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 41,177
Service connections 13,204
Systems serving this area 3
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Wallingford tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does Wallingford water have PFAS? ▼
It was sampled, but no sampling point had enough results for a compliance determination.
Who supplies water to Wallingford? ▼
Wallingford Water Department (PWSID CT1480011), one of 3 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2023-09-28. Inspectors recorded 3 significant deficiencies.

What Should Wallingford 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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