St. Charles 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 St. Charles Parish in Louisiana · Population: 51,863
TRI sites such as Bayer Cropscience LP; Shell Norco Chemical Plant; Valero Refining - New Orleans LLC; SDWIS systems such as ST CHARLES PARISH DEPT OF WATERWORKS anchor St. Charles Parish, LA's EPA extract. Derived burden score 47/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Bayer Cropscience LP; Shell Norco Chemical Plant; Valero Refining - New Orleans LLC are among the largest Form R filers reporting in St. Charles Parish; no SDWIS system here carries an active health-based flag. No AQS county monitors report here.
Burden score 47/100 (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. Charles 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. Charles Parish, LA: EPA TRI 2023 reporting year
Same facilities, both years
-12.0%
24 facilities that filed in 2022 and 2023
Whole inventory
-12.0%
19.8 million lb → 17.4 million lb, every facility that filed
- St. Charles Parish, LA's total reported releases fell from 19.8 million lb in 2022 to 17.4 million lb in 2023, based on EPA TRI filings.
- St. Charles Parish, LA's off-site transfers rose from 141.0 thousand lb in 2022 to 166.2 thousand lb in 2023, based on EPA TRI filings.
- St. Charles Parish, LA's land releases fell from 17.1 million lb in 2022 to 14.6 million lb in 2023, based on EPA TRI filings.
- St. Charles Parish, LA's water releases fell from 386.7 thousand lb in 2022 to 347.9 thousand lb in 2023, based on EPA TRI filings.
Water Systems (1)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| ST CHARLES PARISH DEPT OF WATERWORKS | 52,879 | 0 |
TRI Facilities (24)
Cities in St. Charles Parish (8)
Frequently Asked Questions
What is the environmental risk level in St. Charles Parish, Louisiana? ▼
Are there Superfund sites in St. Charles Parish? ▼
How many toxic release facilities are in St. Charles Parish? ▼
What is the air quality in St. Charles Parish? ▼
Is the drinking water safe in St. Charles Parish? ▼
What environmental agencies cover St. Charles 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.