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Williamstown, WV Tap Water Quality 2026

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

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

Main Utility: Williamstown Water Dept PWSID: WV3305412 Updated: 2026 Q2
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PFAS above the federal limit

Lead is 3.40 ppb, 23% of the action level and no violations are open. However, PFAS exceeds the federal limit at 1 of 1 sampling points, running as high as 6.53 times the limit.

D

Williamstown earns a D for water quality

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

Lead: 3.40 ppb — 23% of the federal action level
PFAS above the federal limit at 1 of 1 sampling points
39 violations since 2015, 1 health-based
No violations currently open
Williamstown's lead level vs. all West Virginia community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.40 ppb — 23% of the federal action level
✓ Lower lead than 10% of West Virginia utilities
Population Served
584
~1567 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
39 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
23% of EPA action level
3.40 ppb
Action level: 15 ppb
The 90th-percentile lead result is 3.40 ppb, 23% 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
Lead and Copper Rule MONITORING AND REPORTING — TT 2025 Unaddressed
Consumer Confidence Rule OTHER — — 2024 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2024 Unaddressed
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2023–2025 Archived
Di(2-ethylhexyl) adipate MONITORING AND REPORTING — 0.4 mg/L 2023–2025 Archived
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Simazine MONITORING AND REPORTING — 0.004 mg/L 2023–2025 Archived
Di(2-ethylhexyl) phthalate MONITORING AND REPORTING — 0.006 mg/L 2023–2025 Archived
Picloram MONITORING AND REPORTING — 0.5 mg/L 2023–2025 Archived
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2023–2025 Archived
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2023–2025 Archived
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2023–2025 Archived
LASSO MONITORING AND REPORTING — — 2023–2025 Archived
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2023–2025 Archived
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
2,4-D MONITORING AND REPORTING — 0.07 mg/L 2023–2025 Archived
Benzo(a)pyrene MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
Total Polychlorinated Biphenyls (PCB) MONITORING AND REPORTING — 0.0005 mg/L 2023–2025 Archived
Chlordane MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2023–2025 Archived
Barium MONITORING AND REPORTING — 2 mg/L 2023–2025 Archived
Cadmium MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
Chromium MONITORING AND REPORTING — 0.1 mg/L 2023–2025 Archived
CYANIDE MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Fluoride MONITORING AND REPORTING — 4.0 mg/L 2023–2025 Archived
Mercury MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
Nickel MONITORING AND REPORTING — — 2023–2025 Archived
Antimony, Total MONITORING AND REPORTING — 0.006 mg/L 2023–2025 Archived
Beryllium, Total MONITORING AND REPORTING — 0.004 mg/L 2023–2025 Archived
Thallium, Total MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
Selenium MONITORING AND REPORTING — 0.05 mg/L 2023–2025 Archived
Groundwater Rule TREATMENT TECHNIQUE — — 2020 Resolved
Groundwater Rule OTHER — — 2020 Resolved
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2020–2025 Archived
Radium-228 MONITORING AND REPORTING — — 2020–2025 Archived
Consumer Confidence Rule OTHER — — 2019 Unaddressed
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Resolved
Consumer Confidence Rule OTHER — — 2018 Unaddressed
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

39 violations are on record since 2015, of which 1 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Williamstown Water Dept
PWSID WV3305412
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 584
Service connections 1,567
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Williamstown tap water safe to drink? ▼
It meets most federal standards, but PFAS exceeds the federal limit at 1 of 1 sampling points. No violations are currently open. Lead is 3.40 ppb, 23% of the action level.
Does Williamstown water have PFAS? ▼
Yes. PFAS exceeds the federal limit at 1 of 1 sampling points, running as high as 6.53 times the limit. Limits are enforced on a running annual average at each sampling point, not on a single sample.
Who supplies water to Williamstown? ▼
Williamstown Water Dept (PWSID WV3305412), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-02-03. Inspectors recorded 1 significant deficiency.

What Should Williamstown Residents Do?

1
Consider a reverse-osmosis filter
Reverse osmosis removes more than 95% of PFAS. Standard carbon pitchers do not.
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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