Knox, 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 Knox in Indiana · Population: 36,108
TRI sites such as Duke Energy Indiana Inc. - Edwardsport Igcc; Scepter Inc; Futaba Indiana America; SDWIS systems such as VINCENNES WATER DEPARTMENT; BICKNELL MUNICIPAL UTILITIES; KNOX COUNTY WATER, INC.; NPL sites such as Prestolite Battery Division anchor Knox, IN'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 Knox include FREELANDVILLE WATER ASSOCIATION; MONROE CITY WATER UTILITIES; EDWARDSPORT WATER UTILITY, while Duke Energy Indiana Inc. - Edwardsport Igcc leads reported TRI pounds among local Form R filers. AQS median AQI 38 / peak 90 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 Knox -- 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 Knox, IN: EPA TRI 2023 reporting year
Same facilities, both years
-9.1%
5 facilities that filed in 2022 and 2023
Whole inventory
-9.1%
946.4 thousand lb → 860.0 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Knox, IN's total reported releases fell from 946.1 thousand lb in 2022 to 859.6 thousand lb in 2023, based on EPA TRI filings.
- Knox, IN's water releases fell from 3.9 thousand lb in 2022 to 1.7 thousand lb in 2023, based on EPA TRI filings.
- Knox, IN's air releases rose from 176.4 thousand lb in 2022 to 225.9 thousand lb in 2023, based on EPA TRI filings.
- Knox, IN's off-site transfers fell from 765.8 thousand lb in 2022 to 632.0 thousand 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 | 314 (87%) | 46 | 0 | 90 |
| 2023 | 313 (86%) | 43 | 8 | 126 |
| 2022 | 321 (93%) | 23 | 0 | 87 |
| 2021 | 320 (89%) | 38 | 2 | 108 |
| 2020 | 328 (93%) | 22 | 1 | 105 |
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 (10)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| VINCENNES WATER DEPARTMENT | 18,701 | 0 |
| BICKNELL MUNICIPAL UTILITIES | 4,064 | 0 |
| KNOX COUNTY WATER, INC. | 3,525 | 0 |
| FREELANDVILLE WATER ASSOCIATION | 1,175 | 1 |
| MONROE CITY WATER UTILITIES | 813 | 5 |
| EDWARDSPORT WATER UTILITY | 488 | 7 |
| WHEATLAND WATER WORKS | 474 | 0 |
| BRUCEVILLE WATER UTILITY | 449 | 2 |
| SANDBORN WATER DEPARTMENT | 449 | 2 |
| DECKER WATER WORKS | 273 | 0 |
TRI Facilities (7)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Duke Energy Indiana Inc. - Edwardsport Igcc | 2.8M lbs |
| 2 | Scepter Inc | 1.7M lbs |
| 3 | Futaba Indiana America | 1.0K lbs |
| 4 | Wabash Steel Co LLC | 925 lbs |
| 5 | Farbest Foods Inc. | 385 lbs |
| 6 | Riley Equipment | 2 lbs |
| 7 | Hixson Lumber Co. LLC | 0 lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Prestolite Battery Division | NPL Site | 40.63 |
Cities in Knox (9)
Frequently Asked Questions
What is the environmental risk level in Knox, Indiana? ▼
Are there Superfund sites in Knox? ▼
How many toxic release facilities are in Knox? ▼
What is the air quality in Knox? ▼
Is the drinking water safe in Knox? ▼
What environmental agencies cover Knox? ▼
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.