Dekalb, 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 Dekalb in Tennessee · Population: 20,551
TRI sites such as Tenneco Braking (frmly Federal-Mogul Motorparts Llc); Tenneco Inc.; Shiroki N.a. Inc.; SDWIS systems such as DEKALB UTILITY DISTRICT #1; SMITHVILLE WATER SYSTEM; ALEXANDRIA WATER SYSTEM anchor Dekalb, TN's EPA extract. Derived burden score 30/100 (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 Dekalb include SMITHVILLE WATER SYSTEM; ALEXANDRIA WATER SYSTEM; DEKALB UTILITY DISTRICT #4, while Tenneco Braking (frmly Federal-Mogul Motorparts Llc) leads reported TRI pounds among local Form R filers. AQS median AQI 38 / peak 77 in 2024.
Burden score 30/100 (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 Dekalb -- 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 Dekalb, TN: EPA TRI 2023 reporting year
Same facilities, both years
-20.6%
2 facilities that filed in 2022 and 2023
Whole inventory
-20.6%
107.1 thousand lb → 85.0 thousand 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.
- Dekalb, TN's total reported releases fell from 107.0 thousand lb in 2022 to 85.0 thousand lb in 2023, based on EPA TRI filings.
- Dekalb, TN's water releases rose from 62 lb in 2022 to 290 lb in 2023, based on EPA TRI filings.
- Dekalb, TN's air releases fell from 3.9 thousand lb in 2022 to 2.6 thousand lb in 2023, based on EPA TRI filings.
- Dekalb, TN's off-site transfers fell from 103.0 thousand lb in 2022 to 82.1 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 | 312 (93%) | 24 | 0 | 77 |
| 2023 | 333 (95%) | 19 | 0 | 90 |
| 2022 | 348 (97%) | 11 | 0 | 100 |
| 2021 | 349 (96%) | 14 | 0 | 84 |
| 2020 | 336 (99%) | 5 | 0 | 61 |
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 |
|---|---|---|
| DEKALB UTILITY DISTRICT #1 | 17,960 | 0 |
| SMITHVILLE WATER SYSTEM | 7,049 | 6 |
| ALEXANDRIA WATER SYSTEM | 2,626 | 8 |
| DEKALB UTILITY DISTRICT #4 | 927 | 4 |
TRI Facilities (3)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Tenneco Braking (frmly Federal-Mogul Motorparts Llc) | 442.9K lbs |
| 2 | Tenneco Inc. | 8.5K lbs |
| 3 | Shiroki N.a. Inc. | 151 lbs |
Cities in Dekalb (2)
Frequently Asked Questions
What is the environmental risk level in Dekalb, Tennessee? ▼
Are there Superfund sites in Dekalb? ▼
How many toxic release facilities are in Dekalb? ▼
What is the air quality in Dekalb? ▼
Is the drinking water safe in Dekalb? ▼
What environmental agencies cover Dekalb? ▼
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.