Benewah, 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 Benewah in Idaho · Population: 9,913
TRI sites such as Potlatchdeltic Land & Lumber LLC St Maries Complex; Stimson Lumber Co Plummer Operation; Stimson Lumber Co St Maries Operation; SDWIS systems such as ST MARIES CITY OF; PLUMMER CITY OF; PLUMMER TRIBAL COMMUNITY; NPL sites such as St. Maries Creosote anchor Benewah, ID's EPA extract. Derived burden score 40/100 (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 Benewah include ST MARIES CITY OF; PLUMMER CITY OF; PLUMMER TRIBAL COMMUNITY, while Potlatchdeltic Land & Lumber LLC St Maries Complex leads reported TRI pounds among local Form R filers. AQS median AQI 43 / peak 112 in 2024.
Burden score 40/100 (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 Benewah -- 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 Benewah, ID: EPA TRI 2023 reporting year
Same facilities, both years
-50.3%
3 facilities that filed in 2022 and 2023
Whole inventory
-50.3%
136.6 thousand lb → 67.9 thousand lb, every facility that filed
- Benewah, ID's total reported releases fell from 136.6 thousand lb in 2022 to 67.9 thousand lb in 2023, based on EPA TRI filings.
- Benewah, ID's off-site transfers fell from 796 lb in 2022 to 238 lb in 2023, based on EPA TRI filings.
- Benewah, ID's air releases fell from 135.5 thousand lb in 2022 to 67.4 thousand lb in 2023, based on EPA TRI filings.
- Benewah, ID's land releases rose from 333 lb in 2022 to 345 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 | 225 (62%) | 136 | 4 | 112 |
| 2023 | 201 (55%) | 160 | 2 | 164 |
| 2022 | 187 (51%) | 167 | 8 | 177 |
| 2021 | 182 (50%) | 168 | 7 | 197 |
| 2020 | 218 (60%) | 139 | 2 | 492 |
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 (13)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| ST MARIES CITY OF | 4,173 | 1 |
| PLUMMER CITY OF | 1,034 | 2 |
| PLUMMER TRIBAL COMMUNITY | 515 | 1 |
| FERNWOOD WATER DIST | 514 | 2 |
| HARRISON CITY OF | 456 | 1 |
| DESMET | 355 | 1 |
| SANTA WATER AND SEWER DIST | 160 | 0 |
| COTTONWOOD POINT WATER ASSN | 151 | 0 |
| TENSED CITY OF | 146 | 1 |
| EMIDA WATER AND SEWER ASSOCIATION | 120 | 3 |
| EVERGREEN TERRACE WATER ASSOCIATION | 85 | 0 |
| CASSANDRA HILLS OWNERS ASSN | 57 | 10 |
| COEUR D'ALENE SUB-AGENCY | 50 | 1 |
TRI Facilities (3)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Potlatchdeltic Land & Lumber LLC St Maries Complex | 574.6K lbs |
| 2 | Stimson Lumber Co Plummer Operation | 4.4K lbs |
| 3 | Stimson Lumber Co St Maries Operation | 1.0K lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| St. Maries Creosote | Proposed NPL Site | 50.00 |
Cities in Benewah (5)
Frequently Asked Questions
What is the environmental risk level in Benewah, Idaho? ▼
Are there Superfund sites in Benewah? ▼
How many toxic release facilities are in Benewah? ▼
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Is the drinking water safe in Benewah? ▼
What environmental agencies cover Benewah? ▼
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.