Marion, IN
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 Marion in Indiana · Population: 971,822
TRI sites such as Heritage Environmental Services LLC; Ecobat Resources Indiana LLC; Heritage-Crystal Clean LLC - Re-Refinery; SDWIS systems such as CITIZENS WATER - INDIANAPOLIS; CITIZENS WATER OF WESTFIELD, LLC; CITY OF LAWRENCE UTILITIES; NPL sites such as Carter Lee Lumber Co.; Keystone Corridor Ground Water Contamination; Reilly Tar & Chemical Corp. (Indianapolis Plant) anchor Marion, IN's EPA extract. Derived burden score 94/100 (High 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 Marion include CITY OF LAWRENCE UTILITIES; CITIZENS WATER - WHITESTOWN; CITIZENS WATER - MORGAN, while Heritage Environmental Services LLC leads reported TRI pounds among local Form R filers. AQS median AQI 54 / peak 138 in 2024.
Burden score 94/100 (High 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 Marion -- 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 Marion, IN: EPA TRI 2023 reporting year
Same facilities, both years
-3.2%
65 facilities that filed in 2022 and 2023
Whole inventory
-3.2%
7.6 million lb → 7.4 million lb, every facility that filed
Between the two reporting years, 2 facilities filed for the first time and 3 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Marion, IN's total reported releases fell from 7.6 million lb in 2022 to 7.4 million lb in 2023, based on EPA TRI filings.
- Marion, IN's air releases fell from 163.5 thousand lb in 2022 to 105.7 thousand lb in 2023, based on EPA TRI filings.
- Marion, IN's water releases fell from 1.4 thousand lb in 2022 to 1.1 thousand lb in 2023, based on EPA TRI filings.
- Marion, IN's chemicals reported fell from 80 in 2022 to 76 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 | 134 (37%) | 228 | 4 | 138 |
| 2023 | 84 (23%) | 260 | 17 | 259 |
| 2022 | 101 (28%) | 251 | 12 | 154 |
| 2021 | 81 (22%) | 278 | 6 | 114 |
| 2020 | 110 (30%) | 250 | 6 | 144 |
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 Indiana, see the EPA's AirNow.gov.
Water Systems (22)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CITIZENS WATER - INDIANAPOLIS | 880,345 | 0 |
| CITIZENS WATER OF WESTFIELD, LLC | 61,493 | 0 |
| CITY OF LAWRENCE UTILITIES | 49,000 | 6 |
| SPEEDWAY WATER WORKS | 10,578 | 0 |
| CITIZENS WATER - WHITESTOWN | 5,880 | 5 |
| CITIZENS WATER - MORGAN | 5,705 | 1 |
| NEW CASTLE CORRECTIONAL FACILITY | 3,160 | 0 |
| MADISON STATE HOSPITAL | 1,375 | 0 |
| AQUA INDIANA WATER COMPANY | 1,350 | 0 |
| DARLINGTON WATER | 860 | 0 |
| MOORESVILLE ACRES | 752 | 0 |
| APPLE VALLEY UTILITIES, INC. | 712 | 0 |
| INDIANA MASONIC HOME | 654 | 0 |
| AQUA INDIANA - WEDGEWOOD PARK WATER UTIL | 645 | 1 |
| WESTERN ESTATES MOBILE HOME PARK | 248 | 0 |
| CHAIN O LAKES CORRECTIONAL FACILITY | 186 | 2 |
| RICHMOND MOBILE HOME PARK | 150 | 1 |
| VILLAGE GREEN MOBILE HOME PARK | 102 | 3 |
| EMERALD II | 98 | 2 |
| CREEKSIDE MOBILE HOME PARK | 75 | 0 |
| AMERICAN MOBILE HOME PARK | 65 | 0 |
| CITIZENS WATER OF WESTFIELD LLC | 65 | 0 |
TRI Facilities (50)
Superfund Sites (4)
| Site Name | Status | HRS Score |
|---|---|---|
| Carter Lee Lumber Co. | Deleted NPL Site | 35.40 |
| Keystone Corridor Ground Water Contamination | NPL Site | 50.00 |
| Reilly Tar & Chemical Corp. (Indianapolis Plant) | NPL Site | 34.03 |
| Southside Sanitary Landfill | Deleted NPL Site | 41.94 |
Cities in Marion (3)
Frequently Asked Questions
What is the environmental risk level in Marion, Indiana? ▼
Are there Superfund sites in Marion? ▼
How many toxic release facilities are in Marion? ▼
What is the air quality in Marion? ▼
Is the drinking water safe in Marion? ▼
What environmental agencies cover Marion? ▼
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.