Sangamon, 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.
Environmental data for Sangamon in Illinois · Population: 195,217
TRI sites such as City Water Light & Power City of Springfield; Solomon Colors Inc.; US Dod Usaf Capital Map Ang; SDWIS systems such as SPRINGFIELD; CHATHAM; CURRAN-GARDNER TOWNSHIP PWD anchor Sangamon, IL's EPA extract. Derived burden score 38/100 (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 Sangamon include PAWNEE; JEROME; GRANDVIEW, while City Water Light & Power City of Springfield leads reported TRI pounds among local Form R filers. AQS median AQI 41 / peak 105 in 2024.
Burden score 38/100 (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 Sangamon -- 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 Sangamon, IL: EPA TRI 2023 reporting year
Same facilities, both years
-84.1%
3 facilities that filed in 2022 and 2023
Whole inventory
-84.1%
233.8 thousand lb → 37.1 thousand lb, every facility that filed
- Sangamon, IL's total reported releases fell from 233.8 thousand lb in 2022 to 37.1 thousand lb in 2023, based on EPA TRI filings.
- Sangamon, IL's off-site transfers fell from 187.7 thousand lb in 2022 to 12.0 thousand lb in 2023, based on EPA TRI filings.
- Sangamon, IL's land releases fell from 25.7 thousand lb in 2022 to 7.6 thousand lb in 2023, based on EPA TRI filings.
- Sangamon, IL's water releases fell from 440 lb in 2022 to 181 lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 263 (72%) | 102 | 1 | 105 |
| 2023 | 182 (50%) | 163 | 17 | 247 |
| 2022 | 220 (61%) | 138 | 4 | 126 |
| 2021 | 233 (64%) | 129 | 0 | 98 |
| 2020 | 254 (70%) | 110 | 0 | 97 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Illinois, see the EPA's AirNow.gov.
Water Systems (33)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| SPRINGFIELD | 117,444 | 0 |
| CHATHAM | 16,423 | 0 |
| CURRAN-GARDNER TOWNSHIP PWD | 6,651 | 0 |
| WILLIAMSVILLE | 6,198 | 0 |
| AUBURN | 4,574 | 0 |
| RIVERTON | 4,279 | 0 |
| ROCHESTER | 3,856 | 0 |
| PAWNEE | 2,700 | 1 |
| DAWSON | 2,375 | 0 |
| JEROME | 1,600 | 1 |
| PLEASANT PLAINS | 1,508 | 0 |
| GRANDVIEW | 1,405 | 1 |
| NEW BERLIN | 1,380 | 2 |
| MECHANICSBURG-BUFFALO WATER COMMISSION | 1,170 | 0 |
| DIVERNON | 1,100 | 0 |
| ILLIOPOLIS | 1,037 | 16 |
| GRAND VALLEY VILLAGE MHP | 912 | 0 |
| LOAMI | 812 | 0 |
| SUGAR CRK PWD | 754 | 0 |
| THAYER | 721 | 0 |
| Maple Hill Estates | 490 | 0 |
| OAKWOOD ESTATES | 420 | 0 |
| COTTONWOOD COVE MHP | 358 | 0 |
| FORREST PARK MHP | 352 | 0 |
| MIDWEST MHP LINDALE LLC | 250 | 0 |
| HILLVIEW MHP LINDALE LLC | 222 | 0 |
| WESTWOOD PLACE | 152 | 0 |
| SOUTH SANGAMON WATER COMMISSION | 134 | 0 |
| RIDGE VILLAGE MHP | 120 | 0 |
| SCOTTSDALE MHC | 114 | 0 |
| TRI LEVEL MHP LINDALE LLC | 100 | 0 |
| PATCH PLACE MHC | 47 | 0 |
| WESTWOOD | 44 | 0 |
TRI Facilities (3)
| # | Facility | Total Releases |
|---|---|---|
| 1 | City Water Light & Power City of Springfield | 1.4M lbs |
| 2 | Solomon Colors Inc. | 741 lbs |
| 3 | US Dod Usaf Capital Map Ang | 2 lbs |
Cities in Sangamon (17)
Frequently Asked Questions
What is the environmental risk level in Sangamon, Illinois? ▼
Are there Superfund sites in Sangamon? ▼
How many toxic release facilities are in Sangamon? ▼
What is the air quality in Sangamon? ▼
Is the drinking water safe in Sangamon? ▼
What environmental agencies cover Sangamon? ▼
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.