Solano, 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. 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 Solano in California · Population: 450,824
TRI sites such as Valero Refining Co-Cali Fornia Benicia Refinery; Ball Metal Beverage Container Corp; Ardagh Metal Beverage USA Inc Re: Fairfield Plant; SDWIS systems such as CITY OF VALLEJO; CITY OF FAIRFIELD; CITY OF VACAVILLE; NPL sites such as Laboratory for Energy-Related Health Research/Old Campus Landfill (USDOE); Travis Air Force Base anchor Solano, CA's EPA extract. Derived burden score 61/100 (High 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 Solano include CITY OF VALLEJO; CITY OF FAIRFIELD; SUISUN-SOLANO WATER AUTHORITY, while Valero Refining Co-Cali Fornia Benicia Refinery leads reported TRI pounds among local Form R filers. AQS median AQI 36 / peak 80 in 2024.
Burden score 61/100 (High 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 Solano -- 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 Solano, CA: EPA TRI 2023 reporting year
Same facilities, both years
-20.2%
16 facilities that filed in 2022 and 2023
Whole inventory
-20.2%
708.5 thousand lb → 565.7 thousand lb, every facility that filed
- Solano, CA's total reported releases fell from 708.5 thousand lb in 2022 to 565.7 thousand lb in 2023, based on EPA TRI filings.
- Solano, CA's off-site transfers fell from 24.2 thousand lb in 2022 to 16.4 thousand lb in 2023, based on EPA TRI filings.
- Solano, CA's water releases fell from 336.4 thousand lb in 2022 to 240.9 thousand lb in 2023, based on EPA TRI filings.
- Solano, CA's air releases fell from 347.9 thousand lb in 2022 to 308.4 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 | 343 (94%) | 22 | 0 | 80 |
| 2023 | 269 (74%) | 95 | 1 | 105 |
| 2022 | 235 (64%) | 130 | 0 | 93 |
| 2021 | 215 (59%) | 147 | 3 | 126 |
| 2020 | 183 (50%) | 167 | 9 | 228 |
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 (23)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CITY OF VALLEJO | 121,420 | 4 |
| CITY OF FAIRFIELD | 120,377 | 1 |
| CITY OF VACAVILLE | 99,650 | 0 |
| SUISUN-SOLANO WATER AUTHORITY | 29,105 | 41 |
| CITY OF BENICIA | 27,131 | 0 |
| CITY OF DIXON | 12,540 | 0 |
| CITY OF RIO VISTA | 10,489 | 0 |
| CALIFORNIA STATE PRISON - SOLANO | 5,100 | 1 |
| CITY OF VALLEJO-LAKES SYSTEM | 2,800 | 1 |
| VINEYARD RV PARK | 550 | 0 |
| SID - GIBSON CANYON | 535 | 1 |
| SID - ELMIRA | 290 | 0 |
| IMPERIAL MANOR MOBILEHOME COMMUNITY | 280 | 0 |
| SID - QUAIL CANYON | 132 | 0 |
| SID - PLEASANT HILLS RANCH | 89 | 24 |
| ROBIN WAY WATER SYSTEM | 66 | 7 |
| DELTA CONSERVATION CAMP | 65 | 0 |
| SID - BLUE RIDGE OAKS | 63 | 0 |
| SID - PEABODY | 56 | 0 |
| RIVERSIDE MOBILE HOME PARK | 55 | 6 |
| COLLINSVILLE WATER WORKS | 25 | 1 |
| CRESTA MESA PARQUE | 25 | 0 |
| TRAVIS AFB WTP - VALLEJO | 3 | 0 |
TRI Facilities (22)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Valero Refining Co-Cali Fornia Benicia Refinery | 2.9M lbs |
| 2 | Ball Metal Beverage Container Corp | 506.5K lbs |
| 3 | Ardagh Metal Beverage USA Inc Re: Fairfield Plant | 302.3K lbs |
| 4 | Anheuser-Busch LLC - Fairfield Brewery | 99.5K lbs |
| 5 | Univar Solutions USA | 41.0K lbs |
| 6 | Rockwell Collins Inc | 7.2K lbs |
| 7 | Wr Meadows of Northern California | 3.8K lbs |
| 8 | Alza Corp | 1.3K lbs |
| 9 | Duravent Inc. | 441 lbs |
| 10 | U.S. Dod Usaf Travis Afb | 432 lbs |
| 11 | Court Galvanizing Inc. | 327 lbs |
| 12 | Praxair Inc | 282 lbs |
| 13 | Clorox Manufacturing Co | 67 lbs |
| 14 | Producers Dairy Foods Inc | 65 lbs |
| 15 | All Weather Insulated Panels | 5 lbs |
| 16 | Syar Dixon LLC | 1 lbs |
| 17 | Vallejo Ready Mix | 1 lbs |
| 18 | Basalite | 0 lbs |
| 19 | Lake Herman Quarry | 0 lbs |
| 20 | Cemex Construction Materials Pacific LLC | 0 lbs |
| 21 | Toray Advanced Composites | 0 lbs |
| 22 | Timet | 0 lbs |
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| Laboratory for Energy-Related Health Research/Old Campus Landfill (USDOE) | NPL Site | 50.00 |
| Travis Air Force Base | NPL Site | 29.49 |
Cities in Solano (11)
Frequently Asked Questions
What is the environmental risk level in Solano, California? ▼
Are there Superfund sites in Solano? ▼
How many toxic release facilities are in Solano? ▼
What is the air quality in Solano? ▼
Is the drinking water safe in Solano? ▼
What environmental agencies cover Solano? ▼
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.