Beryllium
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2022 (beryllium).
Alaska · drinking water · SDWIS through latest publish
Nenana Municipal Water Water Quality — Nenana, Alaska
PWSID AK2390065 · GroundwaterTribal
486 people served. No health-based SDWIS violations recorded in the past 5 years. 4 remain unresolved. Last cited 4 years ago.
Anomaly engine
Active signals
Beryllium
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2022 (beryllium).
Total Trihalomethanes (TTHM)
Unresolved Total Trihalomethanes Rule violation cited in 2022 (total trihalomethanes (tthm)).
Haloacetic Acids (HAA5)
Unresolved Total Trihalomethanes Rule violation cited in 2022 (haloacetic acids (haa5)).
Most-cited contaminants
What This Utility Gets Cited For
- Beryllium3 citations
- Total Trihalomethanes (TTHM)2 citations
- Haloacetic Acids (HAA5)2 citations
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 · BERYLLIUM
2022 · Beryllium · Phase I/II/V Inorganic Chemical Rules
Failure to monitor as scheduled
MONITORING · BERYLLIUM
2022 · Beryllium · Phase I/II/V Inorganic Chemical Rules
Failure to monitor as scheduled; returned to compliance
MONITORING · BERYLLIUM
2022 · Beryllium · Phase I/II/V Inorganic Chemical Rules
Failure to monitor as scheduled
MONITORING · TOTAL TRIHALOMETHANES (TTHM)
2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule
Failure to monitor as scheduled; returned to compliance
MONITORING · TOTAL TRIHALOMETHANES (TTHM)
2022 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule
Failure to monitor as scheduled
MONITORING · HALOACETIC ACIDS (HAA5)
2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule
Failure to monitor as scheduled; returned to compliance
MONITORING · HALOACETIC ACIDS (HAA5)
2022 · Haloacetic Acids (HAA5) · Total Trihalomethanes Rule
Failure to monitor as scheduled
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 2022-01-01 → 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.