Idaho, ID
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 Idaho in Idaho · Population: 17,120
TRI sites such as Idaho Forest Group Grangeville Facility; SDWIS systems such as GRANGEVILLE WATER DEPT; KAMIAH CITY OF; COTTONWOOD WATER DEPT anchor Idaho, ID's EPA extract. Derived burden score 32/100 (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 Idaho include COTTONWOOD WATER DEPT; PINE RIDGE WATER AND SEWER DIST; ELK CITY WATER AND SEWER ASSN, while Idaho Forest Group Grangeville Facility leads reported TRI pounds among local Form R filers. AQS median AQI 42 / peak 217 in 2024.
Burden score 32/100 (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 Idaho -- 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 Idaho, ID: EPA TRI 2023 reporting year
Same facilities, both years
-13.9%
1 facilities that filed in 2022 and 2023
Whole inventory
-13.9%
32.1 thousand lb → 27.6 thousand lb, every facility that filed
- Idaho, ID's total reported releases fell from 32.1 thousand lb in 2022 to 27.6 thousand lb in 2023, based on EPA TRI filings.
- Idaho, ID's land releases fell from 61 lb in 2022 to 19 lb in 2023, based on EPA TRI filings.
- Idaho, ID's air releases fell from 32.0 thousand lb in 2022 to 27.6 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 | 237 (65%) | 121 | 5 | 217 |
| 2023 | 233 (64%) | 132 | 0 | 98 |
| 2022 | 242 (66%) | 113 | 4 | 263 |
| 2021 | 237 (65%) | 112 | 9 | 188 |
| 2020 | 244 (67%) | 113 | 3 | 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 Idaho, see the EPA's AirNow.gov.
Water Systems (19)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| GRANGEVILLE WATER DEPT | 3,151 | 0 |
| KAMIAH CITY OF | 1,495 | 0 |
| COTTONWOOD WATER DEPT | 977 | 2 |
| KOOSKIA WATER DEPT | 607 | 0 |
| RIGGINS CITY OF | 434 | 0 |
| IDOC NORTH IDAHO CORRECTIONAL INSTITUTE | 425 | 0 |
| PINE RIDGE WATER AND SEWER DIST | 390 | 1 |
| ELK CITY WATER AND SEWER ASSN | 320 | 114 |
| STITES CITY OF | 253 | 1 |
| KAMIAH VALLEY COMPANY LLC | 250 | 0 |
| MONASTERY OF ST GERTRUDES | 200 | 0 |
| FERDINAND CITY OF | 133 | 7 |
| WHITE BIRD CITY OF | 125 | 0 |
| RAPID RIVER WATER & SEWER DIST | 120 | 2 |
| COUNTRY COURT COMMUNITY | 89 | 20 |
| CLEARWATER WATER DIST | 80 | 69 |
| VALLEY VIEW WATER AND SEWER DISTRICT | 70 | 2 |
| LAWYERS CREEK WATER DIST | 50 | 0 |
| VILLAGE 21 WATER DIST | 25 | 0 |
TRI Facilities (1)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Idaho Forest Group Grangeville Facility | 203.7K lbs |
Cities in Idaho (9)
Frequently Asked Questions
What is the environmental risk level in Idaho, Idaho? ▼
Are there Superfund sites in Idaho? ▼
How many toxic release facilities are in Idaho? ▼
What is the air quality in Idaho? ▼
Is the drinking water safe in Idaho? ▼
What environmental agencies cover Idaho? ▼
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.