Contaminant 7500
Unresolved Volatile Organic Chemical Rule violation cited in 2025 (contaminant 7500).
PWSID IL0311830 · Purchased / wholesaleMunicipal
24,090 people served. 1 health-based SDWIS violation recorded in the past 5 years. 13 remain unresolved. Last cited 1 year ago.
Unresolved Volatile Organic Chemical Rule violation cited in 2025 (contaminant 7500).
Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2025 (contaminant 5000).
Unresolved Lead and Copper Rule violation cited in 2025 (thallium).
Unresolved Lead and Copper Rule violation cited in 2025 (contaminant 1925).
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.
OTHER
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Failure to monitor as scheduled
Treatment technique violation
OTHER; 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
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
Failure to monitor as scheduled
Failure to monitor as scheduled; returned to compliance
Failure to monitor as scheduled; returned to compliance
Maywood, Illinois (Census place; block-group disparity scores aggregated by centroid containment): a service population of 23,385. Local disparity score for pm2.5 (fine particulate) sits well above the reference burden (188). Why we surface this →
Low-income
People of color
Under age 5
Over age 64
| Indicator | Disparity score | Reading |
|---|---|---|
| PM2.5 (fine particulate) | 188 | well above the reference burden |
| Ozone | 189 | well above the reference burden |
| Nitrogen dioxide (NO₂) | 223 | severely above the reference burden |
| Diesel particulate | 205 | severely above the reference burden |
| Toxic releases (RSEI) | 211 | severely above the reference burden |
| Traffic proximity | 211 | severely above the reference burden |
| Lead-paint risk (pre-1960 housing) | 208 | severely above the reference burden |
| Superfund site proximity | 65 | below the reference |
| RMP-facility proximity | 224 | severely above the reference burden |
| Hazardous-waste site proximity | 208 | severely above the reference burden |
| Underground storage tanks | 200 | severely above the reference burden |
| NPDES wastewater proximity | 211 | severely above the reference burden |
| 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 2021-01-01 → 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.