West Virginia · drinking water · SDWIS through latest publish

Williamstown Water Dept Water Quality — Williamstown, West Virginia

PWSID WV3305412 · GroundwaterMunicipal

3,469 people served. 2 health-based SDWIS violations recorded in the past 5 years. 35 remain unresolved. Last cited 1 year ago.

ALL SDWIS VIOLATIONS · 20202026 (annual count)
Bar chart of annual values from 2020 to 2026, in violations. Most recent year (2026): 0 violations.30 violations'20'21'22'23'24'25'260 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Beryllium

Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (beryllium).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 5000

Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (contaminant 5000).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 5000

Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (contaminant 5000).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Lindane

Unresolved Nitrate/Nitrite violation cited in 2023 (lindane).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • Contaminant 07004 citations
  • Contaminant 70003 citations
  • Contaminant 50002 citations
  • Beryllium1 citation
  • Lindane1 citation
  • Methoxychlor1 citation
Violation history

What's On The SDWIS Record

Health-based violations exceed an MCL or treatment-technique standard. Monitoring violations are reporting failures with no measured exceedance — they tell you the system isn't fully transparent, not that the water is unsafe today.

MONITORING · BERYLLIUMUNRESOLVED

2025 · Beryllium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1040

MONITORING · CONTAMINANT 5000UNRESOLVED

2025 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 5000

OTHER · CONTAMINANT 7000

2024 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules

OTHER; returned to compliance

CONTAMINANT CODE 7000

OTHER · CONTAMINANT 7000

2024 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules

OTHER; returned to compliance

CONTAMINANT CODE 7000

OTHER · CONTAMINANT 7000

2024 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules

OTHER; returned to compliance

CONTAMINANT CODE 7000

MONITORING · CONTAMINANT 5000UNRESOLVED

2024 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 5000

MONITORING · LINDANEUNRESOLVED

2023 · Lindane · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2010

MONITORING · METHOXYCHLORUNRESOLVED

2023 · Methoxychlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2015

MONITORING · CONTAMINANT 2035UNRESOLVED

2023 · Contaminant 2035 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2035

MONITORING · CONTAMINANT 2036UNRESOLVED

2023 · Contaminant 2036 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2036

MONITORING · CONTAMINANT 2037UNRESOLVED

2023 · Contaminant 2037 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2037

MONITORING · CONTAMINANT 2039UNRESOLVED

2023 · Contaminant 2039 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2039

MONITORING · CONTAMINANT 2040UNRESOLVED

2023 · Contaminant 2040 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2040

MONITORING · CONTAMINANT 2042UNRESOLVED

2023 · Contaminant 2042 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2042

MONITORING · CONTAMINANT 2046UNRESOLVED

2023 · Contaminant 2046 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2046

MONITORING · 2,4-DUNRESOLVED

2023 · 2,4-D · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2050

MONITORING · CONTAMINANT 2051UNRESOLVED

2023 · Contaminant 2051 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2051

MONITORING · 2,4,5-TP (SILVEX)UNRESOLVED

2023 · 2,4,5-TP (Silvex) · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2065

MONITORING · CONTAMINANT 2067UNRESOLVED

2023 · Contaminant 2067 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2067

MONITORING · ALACHLORUNRESOLVED

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2105

MONITORING · CARBOFURANUNRESOLVED

2023 · Carbofuran · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2306

MONITORING · TRICHLOROETHYLENE (TCE)UNRESOLVED

2023 · Trichloroethylene (TCE) · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2383

MONITORING · CONTAMINANT 2959UNRESOLVED

2023 · Contaminant 2959 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2959

MONITORING · ARSENICUNRESOLVED

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1005

MONITORING · BARIUMUNRESOLVED

2023 · Barium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1010

MONITORING · CADMIUMUNRESOLVED

2023 · Cadmium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1015

MONITORING · CHROMIUMUNRESOLVED

2023 · Chromium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1020

MONITORING · FLUORIDEUNRESOLVED

2023 · Fluoride · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1024

MONITORING · MERCURY (INORGANIC)UNRESOLVED

2023 · Mercury (inorganic) · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1025

MONITORING · SELENIUMUNRESOLVED

2023 · Selenium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1035

MONITORING · CONTAMINANT 1036UNRESOLVED

2023 · Contaminant 1036 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1036

MONITORING · CONTAMINANT 1052UNRESOLVED

2023 · Contaminant 1052 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1052

MONITORING · CONTAMINANT 1074UNRESOLVED

2023 · Contaminant 1074 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1074

MONITORING · CONTAMINANT 1075UNRESOLVED

2023 · Contaminant 1075 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1075

MONITORING · CONTAMINANT 1085UNRESOLVED

2023 · Contaminant 1085 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1085

MONITORING · ASBESTOSUNRESOLVED

2023 · Asbestos · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1045

OTHER · CONTAMINANT 0700

2020 · Contaminant 0700 · Drinking water rule (140)

OTHER; returned to compliance

CONTAMINANT CODE 0700

OTHER · CONTAMINANT 0700

2020 · Contaminant 0700 · Drinking water rule (140)

OTHER; returned to compliance

CONTAMINANT CODE 0700

HEALTH-BASED · CONTAMINANT 0700

2020 · Contaminant 0700 · Drinking water rule (140)

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0700

HEALTH-BASED · CONTAMINANT 0700

2020 · Contaminant 0700 · Drinking water rule (140)

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0700

MONITORING · COMBINED RADIUM 226/228UNRESOLVED

2020 · Combined Radium 226/228 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4000

MONITORING · CONTAMINANT 4030UNRESOLVED

2020 · Contaminant 4030 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 4030

Equity context · ACS 2018-2022 · USEPA-clone EJ disparity

Who Drinks This Water

Williamstown, West Virginia (Census place; block-group disparity scores aggregated by centroid containment): a service population of 2,980. Local disparity score for pm2.5 (fine particulate) sits well below the reference (17). Why we surface this →

POPULATION SHARE
7.2%

Low-income

POPULATION SHARE
1.6%

People of color

POPULATION SHARE
4.4%

Under age 5

POPULATION SHARE
25.9%

Over age 64

NATIONAL PERCENTILE · vs all US block groups (population-weighted; ranked against the national EJScreen indicator distribution)

  • PM2.5 (fine particulate)Health riskFine inhalable particles 2.5 micrometers or smaller. They travel deep into the lungs and into the bloodstream — linked to asthma, heart disease, stroke, and premature death.30below the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.35below the national median
  • Nitrogen dioxide (NO₂)Health riskA tailpipe and combustion gas. Concentrates near busy roads and industrial sites; raises risk of airway inflammation, asthma, and lower respiratory infections in children.72above the national median
  • Diesel particulateHealth riskSoot from diesel engines (trucks, trains, ports, construction). EPA classifies it as a likely human carcinogen and a major driver of childhood asthma near freight corridors.33below the national median
  • Toxic releases (RSEI)Health riskEPA's Risk-Screening Environmental Indicators score — weights TRI chemical releases by toxicity, where they go, and how many people are nearby. Higher means greater modeled cancer and chronic-health risk.70above the national median
  • Traffic proximityHealth riskPopulation-weighted distance to high-volume roads. Living close to heavy traffic raises exposure to PM2.5, NO₂, and diesel exhaust — and the cardiovascular and asthma risks that follow.28below the national median
  • Lead-paint risk (pre-1960 housing)Health riskShare of housing built before 1960, when lead-based paint was common. Dust from deteriorating paint is the leading cause of childhood lead poisoning, which permanently impairs cognitive development.80in the highest 20% nationally
  • Superfund site proximityHealth riskPopulation-weighted distance to NPL Superfund sites — the most contaminated waste sites in the country. Nearby groundwater, soil, and air can carry industrial solvents, metals, and other long-lived contaminants.72above the national median
  • RMP-facility proximityHealth riskDistance to facilities holding chemicals at quantities large enough to require an EPA Risk Management Plan (refineries, fertilizer plants, etc.). These pose acute exposure risk during accidental releases.28below the national median
  • Hazardous-waste site proximityHealth riskDistance to RCRA hazardous-waste handlers (treatment, storage, disposal facilities). Indicates potential exposure to industrial chemicals in air, soil, and groundwater.38below the national median
  • Underground storage tanksHealth riskDensity of underground tanks (gasoline, heating oil, industrial fluids). Leaking tanks are a leading source of benzene and other volatile organic compounds in groundwater drinking-water supplies.86in the highest 20% nationally
  • NPDES wastewater proximityHealth riskDistance to permitted industrial wastewater dischargers. Closer proximity raises exposure to pollutants released into surface waters used for fishing, recreation, and downstream drinking-water intakes.72above the national median
  • Drinking-water non-complianceHealth riskEPA score for public water systems with health-based Safe Drinking Water Act violations. Higher means more residents on systems that recently exceeded safe limits for contaminants like lead, arsenic, or nitrate.89in the highest 20% nationally
EJ disparity scores · service-area block groups (100 = national reference; higher = greater disparate burden)
IndicatorDisparity scoreReading
PM2.5 (fine particulate)17well below the reference
Ozone27well below the reference
Nitrogen dioxide (NO₂)40well below the reference
Diesel particulate19well below the reference
Toxic releases (RSEI)37well below the reference
Traffic proximity16well below the reference
Lead-paint risk (pre-1960 housing)40well below the reference
Superfund site proximity39well below the reference
RMP-facility proximity0well below the reference
Hazardous-waste site proximity21well below the reference
Underground storage tanks47well below the reference
NPDES wastewater proximity39well below the reference
Drinking-water non-compliance35well below the reference

Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror).

Source. EPA Safe Drinking Water Information System · retrieved 2026-05-07. Reporting period 2020-01-012026-05-07.

What this is not. SDWIS records compliance against federal MCLs — not a direct readout of tap-water concentrations. Active health-based violations are not the same as a current crisis; we link to the EPA record so you can verify return-to-compliance status before forming a conclusion.