Yolo, 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 Yolo in California · Population: 217,782
TRI sites such as Truck Accessories Group DBA Tag West; Nor-Cal Beverage Co Inc; Watts Regulator Co.; SDWIS systems such as CITY OF DAVIS; CITY OF WOODLAND; UC - DAVIS; NPL sites such as Frontier Fertilizer anchor Yolo, 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 Yolo include UC - DAVIS; ESPARTO C.S.D.; KNIGHTS LANDING SVC. DIST., while Truck Accessories Group DBA Tag West leads reported TRI pounds among local Form R filers. AQS median AQI 45 / peak 118 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 Yolo -- 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 Yolo, CA: EPA TRI 2023 reporting year
Same facilities, both years
-38.6%
8 facilities that filed in 2022 and 2023
Whole inventory
-38.6%
83.1 thousand lb → 51.0 thousand lb, every facility that filed
- Yolo, CA's total reported releases fell from 83.1 thousand lb in 2022 to 51.0 thousand lb in 2023, based on EPA TRI filings.
- Yolo, CA's air releases fell from 74.7 thousand lb in 2022 to 42.9 thousand lb in 2023, based on EPA TRI filings.
- Yolo, CA's off-site transfers fell from 8.4 thousand lb in 2022 to 8.1 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 | 238 (65%) | 127 | 1 | 118 |
| 2023 | 246 (67%) | 117 | 2 | 108 |
| 2022 | 283 (78%) | 80 | 2 | 101 |
| 2021 | 242 (66%) | 117 | 4 | 159 |
| 2020 | 215 (59%) | 123 | 14 | 209 |
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 (19)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CITY OF DAVIS | 67,457 | 0 |
| CITY OF WOODLAND | 61,462 | 0 |
| UC - DAVIS | 49,616 | 2 |
| Yocha Dehe Potable Water System | 12,800 | 0 |
| CITY OF WINTERS | 7,115 | 0 |
| ESPARTO C.S.D. | 3,574 | 3 |
| WILD WINGS GOLF COMMUNITY | 1,115 | 0 |
| KNIGHTS LANDING SVC. DIST. | 944 | 3 |
| MADISON SERVICE DIST | 876 | 2 |
| MONROE/LEINBERGER CNTR - WATERS | 800 | 1 |
| YOLO CO HOUSING AUTHORITY-EL RIO VILLA | 432 | 0 |
| NORTH DAVIS MEADOWS | 314 | 39 |
| CACHEVILLE SERVICE DIST | 239 | 1 |
| FINNLEES TRAILER PARK | 55 | 0 |
| TIERRA BUENA MHP #1 | 50 | 3 |
| CEDAR CREEK MOBILEHOME PARK | 40 | 1 |
| ROLLING ACRES MUTUAL WATER COMPANY | 40 | 0 |
| STONEBRIDGE MUTUAL WATER CO | 38 | 0 |
| WOODLAND-DAVIS CLEAN WATER AGENCY | 0 | 0 |
TRI Facilities (10)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Truck Accessories Group DBA Tag West | 363.2K lbs |
| 2 | Nor-Cal Beverage Co Inc | 12.4K lbs |
| 3 | Watts Regulator Co. | 6.4K lbs |
| 4 | Equilon Enterprises LLC West Sacramento Terminal | 374 lbs |
| 5 | Veritiv Operating Co - CA515 West Sacramento | 111 lbs |
| 6 | Pavestone - Winters Ca Plant | 0 lbs |
| 7 | Woodland Plant | 0 lbs |
| 8 | Woodland Wood Preservers Ltd. | 0 lbs |
| 9 | Cemex Construction Materials Pacific LLC | 0 lbs |
| 10 | Skyline Woodland | 0 lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Frontier Fertilizer | NPL Site | 35.04 |
Cities in Yolo (8)
Frequently Asked Questions
What is the environmental risk level in Yolo, California? ▼
Are there Superfund sites in Yolo? ▼
How many toxic release facilities are in Yolo? ▼
What is the air quality in Yolo? ▼
Is the drinking water safe in Yolo? ▼
What environmental agencies cover Yolo? ▼
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.