Beryllium
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (beryllium).
PWSID CA1510013 · GroundwaterMunicipal
14,161 people served. 9 health-based SDWIS violations recorded in the past 5 years. 10 remain unresolved. Last cited 1 year ago.
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (beryllium).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (beryllium).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (beryllium).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (beryllium).
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
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
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
McFarland, California (Census place; block-group disparity scores aggregated by centroid containment): a service population of 13,971. Local disparity score for pm2.5 (fine particulate) sits severely above the reference burden (282). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 282 | severely above the reference burden |
| Ozone | 276 | severely above the reference burden |
| Nitrogen dioxide (NO₂) | 170 | well above the reference burden |
| Diesel particulate | 209 | severely above the reference burden |
| Toxic releases (RSEI) | 70 | below the reference |
| Traffic proximity | 157 | well above the reference burden |
| Lead-paint risk (pre-1960 housing) | 155 | well above the reference burden |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 241 | severely above the reference burden |
| Hazardous-waste site proximity | 147 | moderately above the reference |
| Underground storage tanks | 0 | well below the reference |
| NPDES wastewater proximity | 0 | well below the reference |
| Drinking-water non-compliance | 265 | 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 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.