Contaminant 0200
Unresolved Surface Water Treatment Rule violation cited in 2023 (contaminant 0200).
PWSID CA4100529 · Surface waterPrivate
208 people served. 5 health-based SDWIS violations recorded in the past 5 years. 4 remain unresolved. Last cited 2 years ago.
Unresolved Surface Water Treatment Rule violation cited in 2023 (contaminant 0200).
Unresolved Surface Water Treatment Rule violation cited in 2023 (contaminant 0200).
Unresolved Surface Water Treatment Rule violation cited in 2023 (contaminant 0200).
Unresolved Surface Water Treatment Rule violation cited in 2023 (contaminant 0200).
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.
Failure to monitor as scheduled; returned to compliance
Treatment technique violation
Treatment technique violation
Treatment technique violation
Treatment technique violation; returned to compliance
Treatment technique violation
Oakland, California (Census place; block-group disparity scores aggregated by centroid containment): a service population of 437,825. Local disparity score for pm2.5 (fine particulate) sits well above the reference burden (164). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 164 | well above the reference burden |
| Ozone | 7 | well below the reference |
| Nitrogen dioxide (NO₂) | 142 | moderately above the reference |
| Diesel particulate | 148 | moderately above the reference |
| Toxic releases (RSEI) | 81 | below the reference |
| Traffic proximity | 170 | well above the reference burden |
| Lead-paint risk (pre-1960 housing) | 140 | moderately above the reference |
| Superfund site proximity | 119 | moderately above the reference |
| RMP-facility proximity | 84 | below the reference |
| Hazardous-waste site proximity | 168 | well above the reference burden |
| Underground storage tanks | 0 | well below the reference |
| NPDES wastewater proximity | 15 | well below the reference |
| Drinking-water non-compliance | 0 | 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 2023-01-01 → 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.