Contaminant 0300
Unresolved Long Term 1 Enhanced SWTR violation cited in 2025 (contaminant 0300).
PWSID LA1071009 · Surface waterMunicipal
334,903 people served. 2 health-based SDWIS violations recorded in the past 5 years. 3 remain unresolved. Last cited 1 year ago.
Unresolved Long Term 1 Enhanced SWTR violation cited in 2025 (contaminant 0300).
Unresolved Revised Total Coliform Rule violation cited in 2023 (contaminant 8000).
Unresolved Revised Total Coliform Rule violation cited in 2022 (contaminant 8000).
Long Term 1 Enhanced SWTR health-based violation cited in 2025 (contaminant 0300).
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
Monitoring failure
Monitoring failure; returned to compliance
Monitoring failure; returned to compliance
Monitoring failure; returned to compliance
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Monitoring failure; returned to compliance
Monitoring failure
Monitoring failure; returned to compliance
Monitoring failure; returned to compliance
New Orleans, Louisiana (Census place; block-group disparity scores aggregated by centroid containment): a service population of 380,408. Local disparity score for pm2.5 (fine particulate) sits moderately above the reference (122). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 122 | moderately above the reference |
| Ozone | 36 | well below the reference |
| Nitrogen dioxide (NO₂) | 138 | moderately above the reference |
| Diesel particulate | 163 | well above the reference burden |
| Toxic releases (RSEI) | 181 | well above the reference burden |
| Traffic proximity | 120 | moderately above the reference |
| Lead-paint risk (pre-1960 housing) | 122 | moderately above the reference |
| Superfund site proximity | 138 | moderately above the reference |
| RMP-facility proximity | 165 | well above the reference burden |
| Hazardous-waste site proximity | 152 | well above the reference burden |
| Underground storage tanks | 130 | moderately above the reference |
| NPDES wastewater proximity | 98 | near the reference |
| Drinking-water non-compliance | 176 | well 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 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.