Contaminant 5200
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (contaminant 5200).
PWSID CA1610002 · Surface waterMunicipal
13,696 people served. 13 health-based SDWIS violations recorded in the past 5 years. 14 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 2022 (total trihalomethanes (tthm)).
Unresolved Total Trihalomethanes Rule violation cited in 2022 (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.
Treatment technique violation
Reporting failure
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
Avenal, California (Census place; block-group disparity scores aggregated by centroid containment): a service population of 13,423. Local disparity score for pm2.5 (fine particulate) sits severely above the reference burden (229). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 229 | severely above the reference burden |
| Ozone | 224 | severely above the reference burden |
| Nitrogen dioxide (NO₂) | 133 | moderately above the reference |
| Diesel particulate | 57 | below the reference |
| Toxic releases (RSEI) | 100 | near the reference |
| Traffic proximity | 34 | well below the reference |
| Lead-paint risk (pre-1960 housing) | 109 | near the reference |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 35 | well below the reference |
| Hazardous-waste site proximity | 46 | well below the reference |
| Underground storage tanks | 0 | well below the reference |
| NPDES wastewater proximity | 0 | well below the reference |
| Drinking-water non-compliance | 279 | severely above the reference burden |
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.