Arsenic
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2020 (arsenic).
PWSID WA53AB043 · GroundwaterPrivate
73 people served. No health-based SDWIS violations recorded in the past 5 years. 20 remain unresolved. Last cited 1 year ago.
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2020 (arsenic).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2020 (barium).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2020 (cadmium).
Unresolved Lead and Copper Rule violation cited in 2020 (contaminant 1017).
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; returned to compliance
OTHER; returned to compliance
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Monitoring failure; returned to compliance
Monitoring failure; returned to compliance
Monitoring failure; returned to compliance
Adams County, Washington (utility's served county per SDWIS GEOGRAPHIC_AREA — city-level not yet matched): a service population of 20,557. Local disparity score for pm2.5 (fine particulate) sits severely above the reference burden (204). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 204 | severely above the reference burden |
| Ozone | 80 | below the reference |
| Nitrogen dioxide (NO₂) | 61 | below the reference |
| Diesel particulate | 45 | well below the reference |
| Toxic releases (RSEI) | 54 | below the reference |
| Traffic proximity | 27 | well below the reference |
| Lead-paint risk (pre-1960 housing) | 93 | near the reference |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 157 | well above the reference burden |
| Hazardous-waste site proximity | 21 | well below the reference |
| Underground storage tanks | 101 | near the reference |
| NPDES wastewater proximity | 18 | well below the reference |
| Drinking-water non-compliance | 129 | moderately above 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.