Posey, 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 Posey in Indiana · Population: 25,163
TRI sites such as Sabic Innovative Plastics Mt. Vernon LLC; Consolidated Grain & Barge Co; Sigeco a B Brown Generating Station; SDWIS systems such as MOUNT VERNON WATER WORKS; NEW HARMONY WATER UTILITY; POSEYVILLE MUNICIPAL WATER DEPARTMENT anchor Posey, IN'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 Posey include POSEYVILLE MUNICIPAL WATER DEPARTMENT, while Sabic Innovative Plastics Mt. Vernon LLC leads reported TRI pounds among local Form R filers. AQS median AQI 37 / peak 122 in 2024.
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 Posey -- 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 Posey, IN: EPA TRI 2023 reporting year
Same facilities, both years
-36.4%
10 facilities that filed in 2022 and 2023
Whole inventory
-36.4%
7.8 million lb → 4.9 million lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Posey, IN's total reported releases fell from 7.8 million lb in 2022 to 4.9 million lb in 2023, based on EPA TRI filings.
- Posey, IN's land releases fell from 454.0 thousand lb in 2022 to 227.1 thousand lb in 2023, based on EPA TRI filings.
- Posey, IN's water releases fell from 1.4 million lb in 2022 to 775.4 thousand lb in 2023, based on EPA TRI filings.
- Posey, IN's off-site transfers fell from 4.7 million lb in 2022 to 2.7 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 | 340 (93%) | 24 | 1 | 122 |
| 2023 | 304 (86%) | 43 | 7 | 126 |
| 2022 | 349 (96%) | 15 | 0 | 97 |
| 2021 | 344 (96%) | 16 | 0 | 77 |
| 2020 | 336 (95%) | 18 | 1 | 112 |
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 (3)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| MOUNT VERNON WATER WORKS | 6,426 | 0 |
| NEW HARMONY WATER UTILITY | 1,633 | 0 |
| POSEYVILLE MUNICIPAL WATER DEPARTMENT | 1,400 | 29 |
TRI Facilities (11)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Sabic Innovative Plastics Mt. Vernon LLC | 27.7M lbs |
| 2 | Consolidated Grain & Barge Co | 2.4M lbs |
| 3 | Sigeco a B Brown Generating Station | 2.0M lbs |
| 4 | Countrymark Refining & Logistics LLC | 444.0K lbs |
| 5 | Valero Renewable Fuels-Mount Vernon | 143.2K lbs |
| 6 | Green Plains Mount Vernon LLC | 100.8K lbs |
| 7 | Building Materials Manufacturing LLC | 47.5K lbs |
| 8 | Mplx Terminals LLC - Mt Vernon LP Terminal | 14.0K lbs |
| 9 | Bwxt Nuclear Operations Group | 8.9K lbs |
| 10 | Cimbar Performance Minerals | 9 lbs |
| 11 | Adm Milling Co | 0 lbs |
Cities in Posey (3)
Frequently Asked Questions
What is the environmental risk level in Posey, Indiana? ▼
Are there Superfund sites in Posey? ▼
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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.