Contaminant 3028
Unresolved Drinking water rule (140) violation cited in 2024 (contaminant 3028).
PWSID OR4100917 · GroundwaterMunicipal
1,837 people served. No health-based SDWIS violations recorded in the past 5 years. 9 remain unresolved. Last cited 2 years ago.
Unresolved Drinking water rule (140) violation cited in 2024 (contaminant 3028).
Unresolved Drinking water rule (140) violation cited in 2024 (contaminant 3028).
Unresolved Total Trihalomethanes Rule violation cited in 2024 (total trihalomethanes (tthm)).
Unresolved Total Trihalomethanes Rule violation cited in 2024 (total trihalomethanes (tthm)).
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
OTHER; returned to compliance
OTHER; returned to compliance
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
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; 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
Monitoring failure; returned to compliance
Monitoring failure; returned to compliance
Monitoring failure
Monitoring failure; returned to compliance
OTHER; returned to compliance
OTHER; returned to compliance
OTHER; returned to compliance
Monitoring failure; returned to compliance
Monitoring failure; returned to compliance
Malheur County, Oregon (utility's served county per SDWIS GEOGRAPHIC_AREA — city-level not yet matched): a service population of 31,538. Local disparity score for pm2.5 (fine particulate) sits moderately above the reference (128). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 128 | moderately above the reference |
| Ozone | 113 | moderately above the reference |
| Nitrogen dioxide (NO₂) | 76 | below the reference |
| Diesel particulate | 63 | below the reference |
| Toxic releases (RSEI) | 17 | well below the reference |
| Traffic proximity | 35 | well below the reference |
| Lead-paint risk (pre-1960 housing) | 103 | near the reference |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 90 | near the reference |
| Hazardous-waste site proximity | 38 | well below the reference |
| Underground storage tanks | 86 | below the reference |
| NPDES wastewater proximity | 153 | well above the reference burden |
| Drinking-water non-compliance | 39 | well 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.