Washington, IL
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Washington in Illinois · Population: 13,682
TRI sites such as Prairie State Generating Co; Nascote Industries; Antolin Nashville; SDWIS systems such as WASHINGTON COUNTY WATER COMPANY; MILLSTONE PWD; NASHVILLE anchor Washington, IL's EPA extract. Derived burden score 42/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Washington include WASHINGTON COUNTY WATER COMPANY; MILLSTONE PWD; EGYPTIAN WATER COMPANY, while Prairie State Generating Co leads reported TRI pounds among local Form R filers. No AQS county monitors report here.
Burden score 42/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Washington -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Washington, IL: EPA TRI 2023 reporting year
Same facilities, both years
-3.0%
4 facilities that filed in 2022 and 2023
Whole inventory
-3.0%
7.2 million lb → 7.0 million lb, every facility that filed
- Washington, IL's total reported releases fell from 7.2 million lb in 2022 to 7.0 million lb in 2023, based on EPA TRI filings.
- Washington, IL's water releases rose from 463 lb in 2022 to 1.3 thousand lb in 2023, based on EPA TRI filings.
- Washington, IL's air releases rose from 357.0 thousand lb in 2022 to 398.1 thousand lb in 2023, based on EPA TRI filings.
- Washington, IL's land releases fell from 6.8 million lb in 2022 to 6.6 million lb in 2023, based on EPA TRI filings.
Water Systems (11)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| WASHINGTON COUNTY WATER COMPANY | 11,374 | 1 |
| MILLSTONE PWD | 5,565 | 10 |
| NASHVILLE | 3,230 | 0 |
| EGYPTIAN WATER COMPANY | 2,330 | 1 |
| OKAWVILLE | 1,457 | 2 |
| BALDWIN | 601 | 0 |
| ASHLEY | 565 | 0 |
| NEW MINDEN | 343 | 0 |
| RICHVIEW | 251 | 0 |
| DUBOIS | 200 | 0 |
| RADOM | 193 | 0 |
TRI Facilities (4)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Prairie State Generating Co | 37.9M lbs |
| 2 | Nascote Industries | 74.0K lbs |
| 3 | Antolin Nashville | 1.2K lbs |
| 4 | Purina Animal Nutrition LLC - Nashville Il | 0 lbs |
Cities in Washington (6)
Frequently Asked Questions
What is the environmental risk level in Washington, Illinois? ▼
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What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.