St. Bernard 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.
Environmental data for St. Bernard Parish in Louisiana · Population: 44,172
TRI sites such as Chalmette Refining LLC; Valero Refining - Meraux LLC Meraux Refinery; Rain Cii Carbon LLC; SDWIS systems such as ST BERNARD PARISH WATERWORKS anchor St. Bernard Parish, LA's EPA extract. Derived burden score 34/100 (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 St. Bernard Parish include ST BERNARD PARISH WATERWORKS, while Chalmette Refining LLC leads reported TRI pounds among local Form R filers. AQS median AQI 45 / peak 138 in 2024.
Burden score 34/100 (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 St. Bernard 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 St. Bernard Parish, LA: EPA TRI 2023 reporting year
Same facilities, both years
-13.4%
4 facilities that filed in 2022 and 2023
Whole inventory
-13.4%
679.6 thousand lb → 588.3 thousand lb, every facility that filed
- St. Bernard Parish, LA's total reported releases fell from 679.6 thousand lb in 2022 to 588.3 thousand lb in 2023, based on EPA TRI filings.
- St. Bernard Parish, LA's off-site transfers fell from 446 lb in 2022 to 214 lb in 2023, based on EPA TRI filings.
- St. Bernard Parish, LA's air releases fell from 513.6 thousand lb in 2022 to 442.3 thousand lb in 2023, based on EPA TRI filings.
- St. Bernard Parish, LA's water releases fell from 165.6 thousand lb in 2022 to 145.8 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 | 241 (66%) | 123 | 2 | 138 |
| 2023 | 156 (43%) | 207 | 2 | 119 |
| 2022 | 209 (57%) | 155 | 1 | 108 |
| 2021 | 206 (57%) | 153 | 0 | 80 |
| 2020 | 229 (64%) | 128 | 0 | 86 |
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 (1)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| ST BERNARD PARISH WATERWORKS | 44,783 | 6 |
TRI Facilities (5)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Chalmette Refining LLC | 2.7M lbs |
| 2 | Valero Refining - Meraux LLC Meraux Refinery | 457.8K lbs |
| 3 | Rain Cii Carbon LLC | 110.5K lbs |
| 4 | Valero Partners LLC | 54.1K lbs |
| 5 | Energy Transfer Geismar Olefins LLC - Chalmette Gas Processi | 12.6K lbs |
Cities in St. Bernard Parish (2)
Frequently Asked Questions
What is the environmental risk level in St. Bernard Parish, Louisiana? ▼
Are there Superfund sites in St. Bernard Parish? ▼
How many toxic release facilities are in St. Bernard Parish? ▼
What is the air quality in St. Bernard Parish? ▼
Is the drinking water safe in St. Bernard Parish? ▼
What environmental agencies cover St. Bernard 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.