Contaminant 5200
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (contaminant 5200).
PWSID CA1300626 · Purchased / wholesalePrivate
650 people served. 4 health-based SDWIS violations recorded in the past 5 years. 4 remain unresolved. Last cited 2 years ago.
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (contaminant 5200).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (contaminant 5200).
Unresolved Total Trihalomethanes Rule violation cited in 2024 (total trihalomethanes (tthm)).
Unresolved Total Trihalomethanes Rule violation cited in 2021 (haloacetic acids (haa5)).
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
Reporting failure
Failure to monitor as scheduled
Failure to monitor as scheduled; returned to compliance
Maximum contaminant level exceeded
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded; returned to compliance
El Centro, California (Census place; block-group disparity scores aggregated by centroid containment): a service population of 44,184. Local disparity score for pm2.5 (fine particulate) sits severely above the reference burden (238). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 238 | severely above the reference burden |
| Ozone | 233 | severely above the reference burden |
| Nitrogen dioxide (NO₂) | 178 | well above the reference burden |
| Diesel particulate | 205 | severely above the reference burden |
| Toxic releases (RSEI) | 6 | well below the reference |
| Traffic proximity | 165 | well above the reference burden |
| Lead-paint risk (pre-1960 housing) | 106 | near the reference |
| Superfund site proximity | 31 | well below the reference |
| RMP-facility proximity | 250 | severely above the reference burden |
| Hazardous-waste site proximity | 162 | well above the reference burden |
| Underground storage tanks | 0 | well below the reference |
| NPDES wastewater proximity | 118 | 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 2021-01-01 → 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.