Monroe, MS
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 Monroe in Mississippi · Population: 33,928
TRI sites such as Tronox LLC; Nauticstar LLC; Westlake Chemicals & Vinyls LLC; SDWIS systems such as CITY OF AMORY; TOWN OF ABERDEEN; HAMILTON WATER DISTRICT anchor Monroe, MS's EPA extract. Derived burden score 40/100 (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 Monroe include TOWN OF SMITHVILLE; VILLAGE OF GATTMAN, while Tronox LLC leads reported TRI pounds among local Form R filers. No AQS county monitors report here.
Burden score 40/100 (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 Monroe -- 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 Monroe, MS: EPA TRI 2023 reporting year
Same facilities, both years
-26.2%
8 facilities that filed in 2022 and 2023
Whole inventory
-26.2%
13.4 million lb → 9.9 million lb, every facility that filed
- Monroe, MS's total reported releases fell from 13.4 million lb in 2022 to 9.9 million lb in 2023, based on EPA TRI filings.
- Monroe, MS's off-site transfers rose from 2.9 thousand lb in 2022 to 5.3 thousand lb in 2023, based on EPA TRI filings.
- Monroe, MS's water releases fell from 746.6 thousand lb in 2022 to 383.6 thousand lb in 2023, based on EPA TRI filings.
- Monroe, MS's air releases fell from 568.4 thousand lb in 2022 to 424.0 thousand lb in 2023, based on EPA TRI filings.
Water Systems (9)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CITY OF AMORY | 9,350 | 0 |
| TOWN OF ABERDEEN | 7,783 | 0 |
| HAMILTON WATER DISTRICT | 4,029 | 0 |
| QUINCY WATER ASSOCIATION #1 | 3,519 | 0 |
| TOWN OF SMITHVILLE | 2,062 | 2 |
| TOWN OF HATLEY | 1,962 | 0 |
| QUINCY WATER ASSOCIATION #2 | 1,246 | 0 |
| GAINES-TRACE WATER ASSOCIATION | 1,214 | 0 |
| VILLAGE OF GATTMAN | 790 | 4 |
TRI Facilities (8)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Tronox LLC | 64.0M lbs |
| 2 | Nauticstar LLC | 722.6K lbs |
| 3 | Westlake Chemicals & Vinyls LLC | 138.7K lbs |
| 4 | Sterling Specialty Chemicals US LLC | 36.6K lbs |
| 5 | True Temper Sports Inc | 17.7K lbs |
| 6 | Legacy Boats LLC DBA Avid Boats | 1.8K lbs |
| 7 | Westlake Compounds LLC | 0 lbs |
| 8 | Itt Engineered Valves LLC | 0 lbs |
Cities in Monroe (6)
Frequently Asked Questions
What is the environmental risk level in Monroe, Mississippi? ▼
Are there Superfund sites in Monroe? ▼
How many toxic release facilities are in Monroe? ▼
What is the air quality in Monroe? ▼
Is the drinking water safe in Monroe? ▼
What environmental agencies cover Monroe? ▼
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.