Del Norte, 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 Del Norte in California · Population: 27,293
TRI sites such as Rumiano Cheese Co; SDWIS systems such as CITY OF CRESCENT CITY; BERTSCH OCEAN VIEW CSD; SMITH RIVER C.S.D.; NPL sites such as Del Norte Pesticide Storage anchor Del Norte, CA's EPA extract. Derived burden score 30/100 (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 Del Norte include GASQUET C.S.D.; BIG ROCK C.S.D.; KLAMATH C.S.D., while Rumiano Cheese Co leads reported TRI pounds among local Form R filers. AQS median AQI 32 / peak 125 in 2024.
Burden score 30/100 (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 Del Norte -- 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 Del Norte, CA: EPA TRI 2023 reporting year
Same facilities, both years
-100.0%
1 facilities that filed in 2022 and 2023
Whole inventory
-100.0%
1.0 thousand lb → 0 lb, every facility that filed
- Del Norte, CA's total reported releases fell from 1.0 thousand lb in 2022 to 0 lb in 2023, based on EPA TRI filings.
- Del Norte, CA's air releases fell from 1.0 thousand lb in 2022 to 0 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 | 232 (80%) | 55 | 2 | 125 |
| 2023 | 268 (82%) | 52 | 6 | 187 |
| 2022 | 299 (87%) | 45 | 0 | 74 |
| 2021 | 259 (80%) | 64 | 0 | 72 |
| 2020 | 193 (66%) | 90 | 4 | 245 |
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 (20)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CITY OF CRESCENT CITY | 17,262 | 0 |
| BERTSCH OCEAN VIEW CSD | 2,605 | 0 |
| SMITH RIVER C.S.D. | 2,568 | 0 |
| GASQUET C.S.D. | 657 | 2 |
| BIG ROCK C.S.D. | 513 | 1 |
| KLAMATH C.S.D. | 360 | 1 |
| Yurok - Terwer Water System | 300 | 0 |
| Howonquet Community(Smith River) | 220 | 0 |
| Yurok - Requa | 215 | 0 |
| REDWOOD PARK C.S.D. | 200 | 3 |
| HRC C.S.D. | 185 | 2 |
| HUNTER VALLEY CSD | 174 | 1 |
| Yurok - Weitchpec | 120 | 18 |
| WEST PARK PROPERTIES | 112 | 1 |
| Yurok - Wautec | 96 | 25 |
| Yurok - Kepel | 76 | 12 |
| Pulikla Tribe | 70 | 0 |
| ROCK CREEK MUTUAL WATER CO. | 60 | 2 |
| JED SMITH HOMEOWNERS ASSN. | 58 | 2 |
| Yurok - McCoy - Kenek | 30 | 47 |
TRI Facilities (1)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Rumiano Cheese Co | 1.0K lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Del Norte Pesticide Storage | Deleted NPL Site | 35.79 |
Cities in Del Norte (4)
Frequently Asked Questions
What is the environmental risk level in Del Norte, California? ▼
Are there Superfund sites in Del Norte? ▼
How many toxic release facilities are in Del Norte? ▼
What is the air quality in Del Norte? ▼
Is the drinking water safe in Del Norte? ▼
What environmental agencies cover Del Norte? ▼
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.