Ouachita Parish, LA
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 Ouachita Parish in Louisiana · Population: 158,916
TRI sites such as Advancion Corp; Graphic Packaging International LLC; Ecological Tanks Inc; SDWIS systems such as WEST MONROE WATER SYSTEM; SOUTHWEST OUACHITA WATERWORKS, INC; PRAIRIE ROAD WATER DISTRICT anchor Ouachita Parish, LA's EPA extract. Derived burden score 44/100 (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 Ouachita Parish include WEST MONROE WATER SYSTEM; SOUTHWEST OUACHITA WATERWORKS, INC; PRAIRIE ROAD WATER DISTRICT, while Advancion Corp leads reported TRI pounds among local Form R filers. AQS median AQI 41 / peak 97 in 2024.
Burden score 44/100 (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 Ouachita Parish -- 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 Ouachita Parish, LA: EPA TRI 2023 reporting year
Same facilities, both years
-21.0%
7 facilities that filed in 2022 and 2023
Whole inventory
-21.0%
9.5 million lb → 7.5 million lb, every facility that filed
- Ouachita Parish, LA's total reported releases fell from 9.5 million lb in 2022 to 7.5 million lb in 2023, based on EPA TRI filings.
- Ouachita Parish, LA's off-site transfers rose from 153 lb in 2022 to 222 lb in 2023, based on EPA TRI filings.
- Ouachita Parish, LA's land releases fell from 6.9 million lb in 2022 to 5.1 million lb in 2023, based on EPA TRI filings.
- Ouachita Parish, LA's water releases fell from 269.6 thousand lb in 2022 to 215.6 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 | 292 (80%) | 74 | 0 | 97 |
| 2023 | 283 (79%) | 75 | 0 | 100 |
| 2022 | 309 (86%) | 49 | 1 | 105 |
| 2021 | 318 (91%) | 31 | 0 | 87 |
| 2020 | 324 (90%) | 37 | 1 | 111 |
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 Louisiana, see the EPA's AirNow.gov.
Water Systems (5)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| WEST MONROE WATER SYSTEM | 16,005 | 22 |
| SOUTHWEST OUACHITA WATERWORKS, INC | 10,725 | 40 |
| PRAIRIE ROAD WATER DISTRICT | 2,598 | 126 |
| INDIAN VILLAGE WATER SYSTEM | 2,082 | 54 |
| FROST TOWN WATER SYSTEM | 1,551 | 0 |
TRI Facilities (7)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Advancion Corp | 36.7M lbs |
| 2 | Graphic Packaging International LLC | 12.7M lbs |
| 3 | Ecological Tanks Inc | 190.1K lbs |
| 4 | Lexicon Inc DBA Steel Fabricators of Monroe | 221 lbs |
| 5 | River City Ready Mix LLC - Monroe | 0 lbs |
| 6 | River City Ready Mix LLC - West Monroe | 0 lbs |
| 7 | Plymouth Tube Co | 0 lbs |
Cities in Ouachita Parish (5)
Frequently Asked Questions
What is the environmental risk level in Ouachita Parish, Louisiana? ▼
Are there Superfund sites in Ouachita Parish? ▼
How many toxic release facilities are in Ouachita Parish? ▼
What is the air quality in Ouachita Parish? ▼
Is the drinking water safe in Ouachita Parish? ▼
What environmental agencies cover Ouachita Parish? ▼
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.