Imperial, CA
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 Imperial in California · Population: 179,319
TRI sites such as Spreckels Sugar Co Inc.; U.S. Marine Corps Chocolate Mountains Aerial Gunnery Range; US Navy Naval Air Facility el Centro; SDWIS systems such as EL CENTRO, CITY OF; CALEXICO, CITY OF; BRAWLEY, CITY OF; NPL sites such as Stoker Company anchor Imperial, CA'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 Imperial include CALEXICO, CITY OF; IMPERIAL, CITY OF; HEBER PUBLIC UTILITY DISTRICT, while Spreckels Sugar Co Inc. leads reported TRI pounds among local Form R filers. AQS median AQI 63 / peak 341 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 Imperial -- 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 Imperial, CA: EPA TRI 2023 reporting year
Same facilities, both years
-6.6%
5 facilities that filed in 2022 and 2023
Whole inventory
-6.6%
309.0 thousand lb → 288.7 thousand lb, every facility that filed
- Imperial, CA's total reported releases fell from 309.0 thousand lb in 2022 to 288.7 thousand lb in 2023, based on EPA TRI filings.
- Imperial, CA's off-site transfers fell from 138 lb in 2022 to 115 lb in 2023, based on EPA TRI filings.
- Imperial, CA's water releases fell from 33.0 thousand lb in 2022 to 28.0 thousand lb in 2023, based on EPA TRI filings.
- Imperial, CA's air releases fell from 118.8 thousand lb in 2022 to 103.2 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 | 83 (23%) | 233 | 42 | 341 |
| 2023 | 104 (28%) | 214 | 37 | 506 |
| 2022 | 86 (24%) | 232 | 34 | 791 |
| 2021 | 84 (23%) | 252 | 22 | 436 |
| 2020 | 94 (26%) | 244 | 26 | 166 |
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 California, see the EPA's AirNow.gov.
Water Systems (25)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| EL CENTRO, CITY OF | 43,772 | 0 |
| CALEXICO, CITY OF | 40,357 | 2 |
| BRAWLEY, CITY OF | 26,862 | 0 |
| IMPERIAL, CITY OF | 21,591 | 29 |
| HEBER PUBLIC UTILITY DISTRICT | 6,979 | 7 |
| HOLTVILLE, CITY OF | 6,355 | 28 |
| CALIPATRIA STATE PRISON | 4,800 | 1 |
| CENTINELA STATE PRISON | 4,100 | 31 |
| WESTMORLAND, CITY OF | 2,202 | 8 |
| GATEWAY | 1,800 | 7 |
| SEELEY CWD | 1,729 | 69 |
| SUNBEAM LAKE RV RESORT | 650 | 4 |
| NAF EL CENTRO | 637 | 0 |
| COUNTRY LIFE MH & RV PARK | 600 | 1 |
| PALO VERDE COUNTY WATER DIST. | 410 | 5 |
| WINTERHAVEN COUNTY WATER DISTRICT | 394 | 1 |
| OCOTILLO MUTUAL WATER CO | 150 | 1 |
| RIO BEND RV GOLF RESORT & STORM CROSSING | 130 | 5 |
| COYOTE VALLEY MUTUAL WATER CO | 125 | 1 |
| MITCHELLS CAMP FAMILY ASSOC. | 125 | 5 |
| VALLEY MOBILE HOME PARK | 70 | 3 |
| GOLD ROCK RANCH | 40 | 2 |
| IID VILLAGE | 37 | 2 |
| UC DESERT RESEARCH AND EXTENSION CENTER | 30 | 83 |
| JACKSON HIDE-A-WAY | 25 | 0 |
TRI Facilities (5)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Spreckels Sugar Co Inc. | 589.6K lbs |
| 2 | U.S. Marine Corps Chocolate Mountains Aerial Gunnery Range | 585.2K lbs |
| 3 | US Navy Naval Air Facility el Centro | 156.1K lbs |
| 4 | Mesquite Mine | 113.3K lbs |
| 5 | US Gypsum Co | 884 lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Stoker Company | Proposed NPL Site | 70.94 |
Cities in Imperial (12)
Frequently Asked Questions
What is the environmental risk level in Imperial, California? ▼
Are there Superfund sites in Imperial? ▼
How many toxic release facilities are in Imperial? ▼
What is the air quality in Imperial? ▼
Is the drinking water safe in Imperial? ▼
What environmental agencies cover Imperial? ▼
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.