Contaminant 0700
Unresolved Drinking water rule (140) violation cited in 2022 (contaminant 0700).
PWSID CA3610850 · GroundwaterState-owned
10,667 people served. 4 health-based SDWIS violations recorded in the past 5 years. 4 remain unresolved. Last cited 4 years ago.
Unresolved Drinking water rule (140) violation cited in 2022 (contaminant 0700).
Unresolved Drinking water rule (140) violation cited in 2022 (contaminant 0700).
Unresolved Drinking water rule (140) violation cited in 2022 (contaminant 0700).
Unresolved Drinking water rule (140) violation cited in 2022 (contaminant 0700).
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.
Treatment technique violation
Treatment technique violation
Treatment technique violation
Treatment technique violation
Chino, California (Census place; block-group disparity scores aggregated by centroid containment): a service population of 91,008. Local disparity score for pm2.5 (fine particulate) sits well above the reference burden (185). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 185 | well above the reference burden |
| Ozone | 187 | well above the reference burden |
| Nitrogen dioxide (NO₂) | 151 | well above the reference burden |
| Diesel particulate | 179 | well above the reference burden |
| Toxic releases (RSEI) | 110 | near the reference |
| Traffic proximity | 160 | well above the reference burden |
| Lead-paint risk (pre-1960 housing) | 44 | well below the reference |
| Superfund site proximity | 4 | well below the reference |
| RMP-facility proximity | 67 | below the reference |
| Hazardous-waste site proximity | 168 | well above the reference burden |
| Underground storage tanks | 0 | well below the reference |
| NPDES wastewater proximity | 149 | moderately above 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 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.