Macon, 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 Macon in Illinois · Population: 102,591
TRI sites such as Adm Decatur Complex; Mueller Co. Plant #4 (south Foundry); Primary Products Ingredients Americas LLC - Decatur; SDWIS systems such as DECATUR; LONG CREEK TOWNSHIP PWS; MOUNT ZION anchor Macon, IL's EPA extract. Derived burden score 48/100 (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 Macon include MOUNT ZION; FORSYTH; WARRENSBURG, while Adm Decatur Complex leads reported TRI pounds among local Form R filers. AQS median AQI 43 / peak 101 in 2024.
Burden score 48/100 (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 Macon -- 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 Macon, IL: EPA TRI 2023 reporting year
Same facilities, both years
-40.2%
10 facilities that filed in 2022 and 2023
Whole inventory
-37.6%
5.8 million lb → 3.6 million lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 0 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Macon, IL's total reported releases fell from 5.8 million lb in 2022 to 3.5 million lb in 2023, based on EPA TRI filings.
- Macon, IL's off-site transfers fell from 1.9 million lb in 2022 to 634.4 thousand lb in 2023, based on EPA TRI filings.
- Macon, IL's water releases fell from 20.6 thousand lb in 2022 to 14.9 thousand lb in 2023, based on EPA TRI filings.
- Macon, IL's air releases fell from 3.9 million lb in 2022 to 2.8 million 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 | 238 (65%) | 127 | 1 | 101 |
| 2023 | 171 (47%) | 178 | 14 | 287 |
| 2022 | 209 (57%) | 154 | 2 | 115 |
| 2021 | 179 (50%) | 179 | 3 | 112 |
| 2020 | 214 (59%) | 148 | 0 | 90 |
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 (13)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| DECATUR | 76,122 | 0 |
| LONG CREEK TOWNSHIP PWS | 7,850 | 0 |
| MOUNT ZION | 5,833 | 23 |
| FORSYTH | 3,490 | 2 |
| MAROA | 1,700 | 0 |
| HARRISTOWN | 1,320 | 0 |
| WARRENSBURG | 1,230 | 1 |
| MACON | 1,205 | 0 |
| ARGENTA | 900 | 0 |
| OREANA | 892 | 0 |
| MISSISSIPPI MANUFACTURED HOME COMMUNITY | 503 | 1 |
| DALTON CITY | 454 | 2 |
| BOODY COMMUNITY WATER COMPANY | 232 | 1 |
TRI Facilities (12)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Adm Decatur Complex | 21.9M lbs |
| 2 | Mueller Co. Plant #4 (south Foundry) | 3.1M lbs |
| 3 | Primary Products Ingredients Americas LLC - Decatur | 1.5M lbs |
| 4 | Mueller - North Foundry | 154.9K lbs |
| 5 | Mueller Co-Plant #1 | 44.2K lbs |
| 6 | Caterpillar Inc. Decatur Fac. | 38.7K lbs |
| 7 | Decatur Foundry Inc | 22.7K lbs |
| 8 | Fuyao Glass Illinois Inc | 20.9K lbs |
| 9 | Voestalpine Railway Systems Nortrak LLC | 7.2K lbs |
| 10 | Vcna Prairie LLC - Yard 1025 | 0 lbs |
| 11 | International Control Services Inc. | 0 lbs |
| 12 | Adm Mechanical | 0 lbs |
Cities in Macon (9)
Frequently Asked Questions
What is the environmental risk level in Macon, Illinois? ▼
Are there Superfund sites in Macon? ▼
How many toxic release facilities are in Macon? ▼
What is the air quality in Macon? ▼
Is the drinking water safe in Macon? ▼
What environmental agencies cover Macon? ▼
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.