Chlorine
Unresolved Disinfectants and Disinfection Byproducts (Stage 2) violation cited in 2025 (chlorine).
PWSID PA5020025 · Surface waterMunicipal
32,644 people served. No health-based SDWIS violations recorded in the past 5 years. 4 remain unresolved. Last cited 1 year ago.
Unresolved Disinfectants and Disinfection Byproducts (Stage 2) violation cited in 2025 (chlorine).
Unresolved Revised Total Coliform Rule violation cited in 2025 (contaminant 8000).
Unresolved Surface Water Treatment Rule violation cited in 2025 (contaminant 0200).
Unresolved Surface Water Treatment Rule violation cited in 2021 (contaminant 0200).
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.
Failure to monitor as scheduled
Monitoring failure
Failure to monitor as scheduled
OTHER; returned to compliance
OTHER; returned to compliance
OTHER; returned to compliance
Failure to monitor as scheduled
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Greensburg, Pennsylvania (Census place; block-group disparity scores aggregated by centroid containment): a service population of 14,876. Local disparity score for pm2.5 (fine particulate) sits well below the reference (38). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 38 | well below the reference |
| Ozone | 60 | below the reference |
| Nitrogen dioxide (NO₂) | 36 | well below the reference |
| Diesel particulate | 53 | below the reference |
| Toxic releases (RSEI) | 58 | below the reference |
| Traffic proximity | 44 | well below the reference |
| Lead-paint risk (pre-1960 housing) | 63 | below the reference |
| Superfund site proximity | 0 | well below the reference |
| RMP-facility proximity | 62 | below the reference |
| Hazardous-waste site proximity | 31 | well below the reference |
| Underground storage tanks | 65 | below the reference |
| NPDES wastewater proximity | 74 | below 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 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.