Contaminant 0300
Unresolved Long Term 1 Enhanced SWTR violation cited in 2025 (contaminant 0300).
PWSID LA1031009 · Surface waterMunicipal
7,512 people served. 53 health-based SDWIS violations recorded in the past 5 years. 30 remain unresolved. Last cited 1 year ago.
Unresolved Long Term 1 Enhanced SWTR violation cited in 2025 (contaminant 0300).
Unresolved Long Term 1 Enhanced SWTR violation cited in 2025 (contaminant 0300).
Unresolved Long Term 1 Enhanced SWTR violation cited in 2025 (contaminant 0300).
Unresolved Total Trihalomethanes Rule violation cited in 2024 (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
Treatment technique violation; returned to compliance
Treatment technique violation
Treatment technique violation; returned to compliance
Treatment technique violation
Treatment technique violation; returned to compliance
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded
Maximum contaminant level exceeded; returned to compliance
Maximum contaminant level exceeded
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation; returned to compliance
Treatment technique violation
Treatment technique violation; returned to compliance
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; returned to compliance
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; returned to compliance
Mansfield, Louisiana (Census place; block-group disparity scores aggregated by centroid containment): a service population of 4,675. Local disparity score for pm2.5 (fine particulate) sits well above the reference burden (198). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 198 | well above the reference burden |
| Ozone | 54 | below the reference |
| Nitrogen dioxide (NO₂) | 118 | moderately above the reference |
| Diesel particulate | 37 | well below the reference |
| Toxic releases (RSEI) | 80 | below the reference |
| Traffic proximity | 53 | below the reference |
| Lead-paint risk (pre-1960 housing) | 193 | well above the reference burden |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 0 | well below the reference |
| Hazardous-waste site proximity | 0 | well below the reference |
| Underground storage tanks | 194 | well above the reference burden |
| NPDES wastewater proximity | 79 | below the reference |
| Drinking-water non-compliance | 293 | 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 2023-01-01 → 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.