Asotin, WA
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 Asotin in Washington · Population: 22,424
TRI sites such as Guy Bennett Lumber Co; SDWIS systems such as PUD #1 OF ASOTIN COUNTY; ASOTIN WATER DEPT anchor Asotin, WA's EPA extract. Derived burden score 7/100 (Low Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Guy Bennett Lumber Co is among the largest Form R filers reporting in Asotin; no SDWIS system here carries an active health-based flag. AQS median AQI 42 / peak 196 in 2024.
Burden score 7/100 (Low 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 Asotin -- 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.
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 | 224 (62%) | 131 | 2 | 196 |
| 2023 | 184 (51%) | 169 | 4 | 204 |
| 2022 | 195 (54%) | 156 | 3 | 200 |
| 2021 | 176 (53%) | 140 | 14 | 233 |
| 2020 | 229 (65%) | 112 | 2 | 328 |
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 Washington, see the EPA's AirNow.gov.
Water Systems (2)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| PUD #1 OF ASOTIN COUNTY | 21,930 | 0 |
| ASOTIN WATER DEPT | 2,531 | 0 |
TRI Facilities (1)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Guy Bennett Lumber Co | 118 lbs |
Cities in Asotin (2)
Frequently Asked Questions
What is the environmental risk level in Asotin, Washington? ▼
Are there Superfund sites in Asotin? ▼
How many toxic release facilities are in Asotin? ▼
What is the air quality in Asotin? ▼
Is the drinking water safe in Asotin? ▼
What environmental agencies cover Asotin? ▼
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.