Haloacetic Acids (HAA5)
Unresolved Total Trihalomethanes Rule violation cited in 2024 (haloacetic acids (haa5)).
PWSID IL0971400 · Purchased / wholesaleMunicipal
5,425 people served. No health-based SDWIS violations recorded in the past 5 years. 3 remain unresolved. Last cited 2 years ago.
Unresolved Total Trihalomethanes Rule violation cited in 2024 (haloacetic acids (haa5)).
Unresolved Total Trihalomethanes Rule violation cited in 2024 (haloacetic acids (haa5)).
Unresolved Total Trihalomethanes Rule violation cited in 2024 (haloacetic acids (haa5)).
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; returned to compliance
Failure to monitor as scheduled
Failure to monitor as scheduled
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
OTHER; returned to compliance
OTHER; 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
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Park City, Illinois (Census place; block-group disparity scores aggregated by centroid containment): a service population of 7,702. Local disparity score for pm2.5 (fine particulate) sits moderately above the reference (128). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 128 | moderately above the reference |
| Ozone | 223 | severely above the reference burden |
| Nitrogen dioxide (NO₂) | 197 | well above the reference burden |
| Diesel particulate | 198 | well above the reference burden |
| Toxic releases (RSEI) | 213 | severely above the reference burden |
| Traffic proximity | 151 | well above the reference burden |
| Lead-paint risk (pre-1960 housing) | 91 | near the reference |
| Superfund site proximity | 235 | severely above the reference burden |
| RMP-facility proximity | 188 | well above the reference burden |
| Hazardous-waste site proximity | 190 | well above the reference burden |
| Underground storage tanks | 219 | severely above the reference burden |
| NPDES wastewater proximity | 178 | well above the reference burden |
| Drinking-water non-compliance | 61 | 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.