Williamson, IL
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.
Environmental data for Williamson in Illinois · Population: 66,902
Williamson, IL is tracked across three EPA datasets covering 9 Toxics Release Inventory (TRI) facilities, 25 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 43/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 2.3M lbs of reported toxic releases under EPCRA Section 313, while 12 water systems carry an active health-based violation in the SDWIS record. No EPA Air Quality System monitors currently report data for this county.
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
Water Systems (25)
| System | Population | Violations |
|---|---|---|
| MARION | 16,855 | 0 |
| HERRIN | 12,747 | 0 |
| LAKE OF EGYPT PWD | 11,368 | 11 |
| CARTERVILLE | 6,484 | 0 |
| COAL VALLEY PWD | 3,960 | 0 |
| CORINTH PWD | 3,927 | 0 |
| JOHNSTON CITY | 3,509 | 1 |
| PITTSBURG | 2,948 | 0 |
| CAMBRIA | 1,727 | 0 |
| CRAINVILLE | 1,711 | 0 |
| FCI-MARION | 1,544 | 0 |
| DEVILS KITCHEN WATER DISTRICT | 1,428 | 14 |
| FERGES WATER DISTRICT | 1,185 | 0 |
| HIGHWAY 37 NORTH PWD | 1,065 | 1 |
| BUNCOMBE WATER DISTRICT | 1,030 | 10 |
| ENERGY | 984 | 0 |
| BLAIRSVILLE PWD | 807 | 8 |
| HURST | 782 | 1 |
| CREAL SPRINGS | 683 | 8 |
| COLP | 506 | 2 |
| FREEMAN SPUR | 373 | 1 |
| THE ORCHARDS MHC | 253 | 0 |
| CRAB ORCHARD ESTATES | 238 | 3 |
| WALNUT GROVE MHC | 40 | 0 |
| CRAB ORCHARD REFUGE | 25 | 2 |
TRI Facilities (9)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Southern Illinois Power Cooperative | 1.6M lbs |
| 2 | Williamson Energy | 732.4K lbs |
| 3 | Aisin Manufacturing Illinois LLC | 4.1K lbs |
| 4 | Diagraph Marking & Coding | 3.6K lbs |
| 5 | U.s.p. Marion | 2.8K lbs |
| 6 | Reaco Battery Service | 2 lbs |
| 7 | General Dynamics Ordnance & Tactical Systems Inc I Area | 0 lbs |
| 8 | General Dynamics Ordnance & Tactical Systems Inc Bfp Area | 0 lbs |
| 9 | Warren Oil Co LLC - Marion Il | 0 lbs |
Cities in Williamson (2)
Frequently Asked Questions
What is the environmental risk level in Williamson, Illinois? ▼
Are there Superfund sites in Williamson? ▼
How many toxic release facilities are in Williamson? ▼
What is the air quality in Williamson? ▼
Is the drinking water safe in Williamson? ▼
What environmental agencies cover Williamson? ▼
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.