Williamson, TN
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 Williamson in Tennessee · Population: 254,609
TRI sites such as Essex Solutions USA LLC; Apcom Inc; Foley Products Co - Franklin; SDWIS systems such as FRANKLIN WATER DEPT; H.B.& T.S. UTILITY DISTRICT; MILCROFTON UTILITY DISTRICT anchor Williamson, TN's EPA extract. Derived burden score 25/100 (Low 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 Williamson include FRANKLIN WATER DEPT, while Essex Solutions USA LLC leads reported TRI pounds among local Form R filers. AQS median AQI 43 / peak 87 in 2024.
Burden score 25/100 (Low 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 Williamson -- 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 Williamson, TN: EPA TRI 2023 reporting year
Same facilities, both years
+30.1%
4 facilities that filed in 2022 and 2023
Whole inventory
+30.1%
77.9 thousand lb → 101.4 thousand 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.
- Williamson, TN's total reported releases rose from 77.9 thousand lb in 2022 to 101.4 thousand lb in 2023, based on EPA TRI filings.
- Williamson, TN's off-site transfers rose from 18.3 thousand lb in 2022 to 40.7 thousand lb in 2023, based on EPA TRI filings.
- Williamson, TN's chemicals reported rose from 11 in 2022 to 12 in 2023, based on EPA TRI filings.
- Williamson, TN's air releases rose from 59.6 thousand lb in 2022 to 60.6 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 | 200 (84%) | 38 | 0 | 87 |
| 2023 | 197 (81%) | 45 | 2 | 122 |
| 2022 | 209 (86%) | 33 | 2 | 122 |
| 2021 | 225 (93%) | 18 | 0 | 67 |
| 2020 | 231 (96%) | 10 | 0 | 71 |
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 Tennessee, see the EPA's AirNow.gov.
Water Systems (4)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| FRANKLIN WATER DEPT | 77,222 | 23 |
| H.B.& T.S. UTILITY DISTRICT | 40,094 | 0 |
| MILCROFTON UTILITY DISTRICT | 38,032 | 0 |
| NOLENSVILLE-COLLEGE GROVE U.D. | 34,159 | 0 |
TRI Facilities (5)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Essex Solutions USA LLC | 304.3K lbs |
| 2 | Apcom Inc | 87.3K lbs |
| 3 | Foley Products Co - Franklin | 1 lbs |
| 4 | Georgia Masonry Supply Franklin | 0 lbs |
| 5 | Smyrna Ready Mix LLC Plant 5 | 0 lbs |
Cities in Williamson (2)
Frequently Asked Questions
What is the environmental risk level in Williamson, Tennessee? ▼
Are there Superfund sites in Williamson? ▼
How many toxic release facilities are in Williamson? ▼
What is the air quality in Williamson? ▼
Is the drinking water safe in Williamson? ▼
What environmental agencies cover Williamson? ▼
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.