Uranium
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (uranium).
PWSID CA3600086 · GroundwaterPrivate
795 people served. 35 health-based SDWIS violations recorded in the past 5 years. 39 remain unresolved. Last cited 1 year ago.
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (uranium).
Unresolved Revised Total Coliform Rule violation cited in 2025 (contaminant 8000).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (uranium).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (uranium).
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.
Maximum contaminant level exceeded
Monitoring failure
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
OTHER
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Failure to monitor as scheduled
Maximum contaminant level exceeded
Monitoring failure
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
San Bernardino County, California (utility's served county per SDWIS GEOGRAPHIC_AREA — city-level not yet matched): a service population of 2,180,563. Local disparity score for pm2.5 (fine particulate) sits well above the reference burden (174). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 174 | well above the reference burden |
| Ozone | 194 | well above the reference burden |
| Nitrogen dioxide (NO₂) | 142 | moderately above the reference |
| Diesel particulate | 155 | well above the reference burden |
| Toxic releases (RSEI) | 84 | below the reference |
| Traffic proximity | 144 | moderately above the reference |
| Lead-paint risk (pre-1960 housing) | 74 | below the reference |
| Superfund site proximity | 97 | near the reference |
| RMP-facility proximity | 121 | moderately above the reference |
| Hazardous-waste site proximity | 153 | well above the reference burden |
| Underground storage tanks | 0 | well below the reference |
| NPDES wastewater proximity | 124 | moderately above the reference |
| Drinking-water non-compliance | 11 | 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.