Contaminant 7000
Unresolved Phase I/II/V Synthetic Organic Chemical Rules violation cited in 2020 (contaminant 7000).
Ohio · drinking water · SDWIS through latest publish
Williamsburg Village Pws Water Quality — Williamsburg, Ohio
PWSID OH1301411 · Purchased / wholesaleMunicipal
2,490 people served. 1 health-based SDWIS violation recorded in the past 5 years. 1 remains unresolved. Last cited 4 years ago.
Anomaly engine
Active signals
Total Trihalomethanes (TTHM)
Total Trihalomethanes Rule health-based violation cited in 2021 (total trihalomethanes (tthm)).
Most-cited contaminants
What This Utility Gets Cited For
- Contaminant 70003 citations
- Total Trihalomethanes (TTHM)1 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.
OTHER · CONTAMINANT 7000
2022 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules
OTHER; returned to compliance
OTHER · CONTAMINANT 7000
2022 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules
OTHER; returned to compliance
HEALTH-BASED · TOTAL TRIHALOMETHANES (TTHM)
2021 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule
Maximum contaminant level exceeded; returned to compliance
OTHER · CONTAMINANT 7000
2020 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules
OTHER
Equity context · ACS 2018-2022 · USEPA-clone EJ disparity
Who Drinks This Water
Williamsburg, Ohio (Census place; block-group disparity scores aggregated by centroid containment): a service population of 2,583. Local disparity score for pm2.5 (fine particulate) sits well below the reference (44). Why we surface this →
15.3%
Low-income
6.9%
People of color
4.3%
Under age 5
13.2%
Over age 64
- 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.59near the national median
- OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.61above 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.45near 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.78above 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.14below 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.56near 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.23below 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.49near the national median
- 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.50near 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
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 44 | well below the reference |
| Ozone | 54 | below the reference |
| Nitrogen dioxide (NO₂) | 33 | well below the reference |
| Diesel particulate | 26 | well below the reference |
| Toxic releases (RSEI) | 56 | below the reference |
| Traffic proximity | 11 | well below the reference |
| Lead-paint risk (pre-1960 housing) | 56 | below the reference |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 0 | well below the reference |
| Hazardous-waste site proximity | 17 | well below the reference |
| Underground storage tanks | 35 | well below the reference |
| NPDES wastewater proximity | 36 | well below the reference |
| Drinking-water non-compliance | 62 | 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 2020-01-01 → 2026-05-07.
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.