Contaminant 8000
Unresolved Revised Total Coliform Rule violation cited in 2025 (contaminant 8000).
Alaska · drinking water · SDWIS through latest publish
Nulato River Well Water Quality — Nulato, Alaska
PWSID AK2360785 · GroundwaterTribal
245 people served. 1 health-based SDWIS violation recorded in the past 5 years. 22 remain unresolved. Last cited 1 year ago.
Anomaly engine
Active signals
Xylenes (total)
Unresolved Arsenic Rule violation cited in 2023 (xylenes (total)).
Benzene
Unresolved Arsenic Rule violation cited in 2023 (benzene).
Contaminant 2955
Unresolved Arsenic Rule violation cited in 2023 (contaminant 2955).
Most-cited contaminants
What This Utility Gets Cited For
- Contaminant 70005 citations
- Contaminant 50004 citations
- Contaminant 80002 citations
- Contaminant 52002 citations
- Beryllium2 citations
- Xylenes (total)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.
MONITORING · CONTAMINANT 8000
2025 · Contaminant 8000 · Revised Total Coliform Rule
Monitoring failure; returned to compliance
MONITORING · CONTAMINANT 8000
2025 · Contaminant 8000 · Revised Total Coliform Rule
Monitoring failure
OTHER · CONTAMINANT 7000
2024 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules
OTHER; returned to compliance
OTHER · CONTAMINANT 7000
2024 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules
OTHER; returned to compliance
HEALTH-BASED · CONTAMINANT 5200
2024 · Contaminant 5200 · Phase I/II/V Inorganic Chemical Rules
Treatment technique violation; returned to compliance
MONITORING · CONTAMINANT 5200
2024 · Contaminant 5200 · Phase I/II/V Inorganic Chemical Rules
Reporting failure; returned to compliance
OTHER · CONTAMINANT 7000
2023 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules
OTHER; returned to compliance
OTHER · CONTAMINANT 7000
2023 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules
OTHER; returned to compliance
OTHER · CONTAMINANT 7000
2023 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules
OTHER; returned to compliance
MONITORING · XYLENES (TOTAL)
2023 · Xylenes (total) · Arsenic Rule
Failure to monitor as scheduled
MONITORING · BENZENE
2023 · Benzene · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2955
2023 · Contaminant 2955 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2964
2023 · Contaminant 2964 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2968
2023 · Contaminant 2968 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2969
2023 · Contaminant 2969 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2976
2023 · Contaminant 2976 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2977
2023 · Contaminant 2977 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2979
2023 · Contaminant 2979 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · METHYL TERT-BUTYL ETHER (MTBE)
2023 · Methyl tert-butyl ether (MTBE) · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2981
2023 · Contaminant 2981 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2982
2023 · Contaminant 2982 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2983
2023 · Contaminant 2983 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2984
2023 · Contaminant 2984 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2985
2023 · Contaminant 2985 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2987
2023 · Contaminant 2987 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2989
2023 · Contaminant 2989 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2990
2023 · Contaminant 2990 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2991
2023 · Contaminant 2991 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2992
2023 · Contaminant 2992 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 2996
2023 · Contaminant 2996 · Arsenic Rule
Failure to monitor as scheduled
MONITORING · CONTAMINANT 5000
2022 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules
Failure to monitor as scheduled; returned to compliance
MONITORING · CONTAMINANT 5000
2022 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules
Failure to monitor as scheduled; returned to compliance
MONITORING · CONTAMINANT 5000
2022 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules
Failure to monitor as scheduled; returned to compliance
MONITORING · CONTAMINANT 5000
2022 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules
Failure to monitor as scheduled; returned to compliance
MONITORING · BERYLLIUM
2021 · Beryllium · Phase I/II/V Inorganic Chemical Rules
Failure to monitor as scheduled; returned to compliance
MONITORING · BERYLLIUM
2021 · Beryllium · Phase I/II/V Inorganic Chemical Rules
Failure to monitor as scheduled; returned to compliance
Equity context · ACS 2018-2022 · USEPA-clone EJ disparity
Who Drinks This Water
Yukon-Koyukuk Census Area, Alaska (utility's served county per SDWIS GEOGRAPHIC_AREA — city-level not yet matched): a service population of 5,355. Local disparity score for nitrogen dioxide (no₂) sits well below the reference (0). Why we surface this →
22.9%
Low-income
78.2%
People of color
8.7%
Under age 5
16.2%
Over age 64
- 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.0below 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.3below 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.1below 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.37below the national median
- 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.14below 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.28below 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.99in the highest 5% nationally
| Indicator | Disparity score | Reading |
|---|---|---|
| Nitrogen dioxide (NO₂) | 0 | well below the reference |
| Toxic releases (RSEI) | 2 | well below the reference |
| Traffic proximity | 0 | well below the reference |
| Lead-paint risk (pre-1960 housing) | 65 | below the reference |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 0 | well below the reference |
| Hazardous-waste site proximity | 0 | well below the reference |
| Underground storage tanks | 0 | well below the reference |
| Drinking-water non-compliance | 220 | severely above the reference burden |
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 2021-01-01 → 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.