TRI Facilities
135
EPCRA Section 313 reporters
2023 EPA TRI data 135 facilities 767 water systems
Idaho Environmental Profile
According to the U.S. Environmental Protection Agency's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List, this is Idaho's (ID) full public environmental-compliance record - toxic releases, drinking-water systems, and Superfund sites in one place.
ID regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
Clean Water Act, NPDES (water-system health violations)
311 records
- RCRA · Subtitle C 12
RCRA Subtitle C (Superfund-site proxy)
12 records
What this shows Counts are mapped to statute as a structural proxy and reflect reported activity, not toxicity-weighted or population-adjusted risk. Clean Air Act (Title V) permit data is not currently ingested by this portal, so air-permit compliance is not shown here.
Water Systems
767
SDWIS regulated
Superfund Sites
12
6 active NPL
Total Releases
200.0M lbs
TRI cumulative disclosure
Compliance Snapshot - ID
Sites with no recorded health violations 65.5%
Sites with at least one open violation 34.5%
Idaho consolidates three federal EPA datasets into one statewide environmental profile: 135 Toxics Release Inventory (TRI) facilities reporting under EPCRA Section 313, 767 community water systems regulated under the Safe Drinking Water Act, and 12 sites on the Superfund National Priorities List.
TRI facilities in ID have cumulatively disclosed 200.0M lbs of toxic chemical releases, while SDWIS records show 2,204 total violations across the state's regulated water systems, of which 311 systems carry an active health-based violation (MCL exceedance or treatment-technique failure). Activity clusters in counties such as Kootenai, Canyon, Ada, which account for the highest combined facility, water-system, and Superfund presence.
Every figure reflects the public regulatory record as filed with the U.S. Environmental Protection Agency and is not weighted for toxicity, geographic footprint, or population exposure. A state can rank high in any individual metric because of industrial history, naturally occurring contaminants in source water, or simply the number of reporting facilities, not because current residents face unsafe conditions. Drill into any county or water system below for the full disclosure record.
What does this state's environmental record show?
TRI Facilities
135
Water Systems
767
Superfund Sites
12
Total Violations
2,204
Total Releases
200.0M lbs
Health Violations
311
water systems
Largest Polluters
View all →| # | Facility | Total Releases |
|---|---|---|
| 1 | Hecla Ltd Lucky Friday Mine Unit | 58.7M lbs |
| 2 | P4 Production LLC | 24.5M lbs |
| 3 | McCain Foods USA Inc. | 20.2M lbs |
| 4 | U.S. Silver - Idaho Inc | 18.8M lbs |
| 5 | J R Simplot Co Don Sid Ing | 17.7M lbs |
| 6 | US Ecology Idaho Inc. | 10.2M lbs |
| 7 | Amalgamated Sugar Co | 9.8M lbs |
| 8 | Clearwater Paper Corp-Ppd & Cpd Idaho | 6.1M lbs |
| 9 | Glanbia Foods Inc | 5.8M lbs |
| 10 | Itafos Conda LLC | 3.4M lbs |
| 11 | US EPA Fund-Lead Superfund Site/bunker Hill Ctp | 3.4M lbs |
| 12 | Amalgamated Sugar Co Nampa | 3.2M lbs |
| 13 | Amalgamated Sugar Co | 2.4M lbs |
| 14 | Glanbia Foods Inc | 1.6M lbs |
| 15 | Federal Cartridge Co-Cci | 1.6M lbs |
| 16 | Simplot U.S. Food Group Holdings LLC | 1.4M lbs |
| 17 | Real Alloy Recycling LLC | 1.3M lbs |
| 18 | Thompson Creek Mining Co | 1.1M lbs |
| 19 | US Doe Idaho National Laboratory Site | 1.0M lbs |
| 20 | P Kay Metal Lewiston | 891.9K lbs |
Water Quality
Systems with Health Violations
| Water System | Population | Violations |
|---|---|---|
| MISSION CREEK WATER ASSN | 263 | 195 |
| ELK CITY WATER AND SEWER ASSN | 320 | 114 |
| JULIAETTA CITY OF | 624 | 81 |
| MEADOW LARK COURT LLC | 45 | 80 |
| CLEARWATER WATER DIST | 80 | 69 |
| DRAKE SUBD | 150 | 62 |
| CEDAR SPRINGS COMMUNITY WATER | 130 | 54 |
| BIA NORTH IDAHO | 490 | 49 |
| ASPEN RIDGE SUBD | 204 | 34 |
| MCCALL CITY OF | 4,423 | 33 |
| FRUITLAND CITY OF | 7,135 | 30 |
| KING HILL DOMESTIC WATER AND SEWER | 87 | 30 |
| RED ROCK WATER LLC | 60 | 29 |
| FERNAN ESTATES CORPORATION | 37 | 26 |
| INDIAN VILLAGE | 225 | 26 |
| CASTLE MOUNTAIN CREEKS OWNERS ASSN | 250 | 26 |
| NEW HOPE SUBD | 100 | 24 |
| FILER WATER WORKS | 2,858 | 23 |
| SHOTGUN CHEROKEE SUBD 5 | 245 | 23 |
| BELLEVUE CITY OF | 2,747 | 22 |
Cities with Water Issues
Pocatello
Pop: -
American Falls
Pop: -
Blackfoot
Pop: -
Soda Springs
Pop: -
Twin Falls
Pop: -
Burley
Pop: -
Jerome
Pop: -
Heyburn
Pop: -
Rupert
Pop: -
Idaho Falls
Pop: -
Rexburg
Pop: -
Salmon
Pop: -
Lewiston
Pop: -
Grangeville
Pop: -
Kamiah
Pop: -
Caldwell
Pop: -
Eagle
Pop: -
Fruitland
Pop: -
Grand View
Pop: -
Marsing
Pop: -
Superfund Sites (12)
| Site Name | Status | HRS Score |
|---|---|---|
| Arrcom (Drexler Enterprises) | Deleted NPL Site | 29.28 |
| Blackbird Mine | Proposed NPL Site | 50.00 |
| Bunker Hill Mining & Metallurgical Complex | NPL Site | 54.76 |
| Eastern Michaud Flats Contamination | NPL Site | 57.80 |
| Idaho National Engineering Laboratory (USDOE) | NPL Site | 51.91 |
| Kerr-McGee Chemical Corp. (Soda Springs Plant) | NPL Site | 51.91 |
| Monsanto Chemical Co. (Soda Springs Plant) | NPL Site | 54.77 |
| Mountain Home Air Force Base | NPL Site | 57.80 |
| Pacific Hide & Fur Recycling Co. | Deleted NPL Site | 42.30 |
| St. Maries Creosote | Proposed NPL Site | 50.00 |
| Stibnite/Yellow Pine Mining Area | Proposed NPL Site | 50.00 |
| Union Pacific Railroad Co. | Deleted NPL Site | 53.47 |
Counties (46 total)
| County | Facilities |
|---|---|
| Kootenai | 9 |
| Canyon | 23 |
| Ada | 15 |
| Bonner | 4 |
| Bonneville | 8 |
| Nez Perce | 12 |
| Bingham | 4 |
| Blaine | 1 |
| Elmore | 2 |
| Twin Falls | 7 |
| Bannock | 1 |
| Idaho | 1 |
| Shoshone | 5 |
| Franklin | 0 |
| Benewah | 3 |
| Latah | 2 |
| Cassia | 4 |
| Jefferson | 0 |
| Boundary | 1 |
| Jerome | 6 |
Showing top 20 counties by environmental activity. Idaho has 46 counties total.
Largest Cities
Pocatello
Pop: -
3 facilities · 15 water systems
American Falls
Pop: -
1 facilities · 3 water systems
Blackfoot
Pop: -
4 facilities · 13 water systems
Clayton
Pop: -
1 facilities · 0 water systems
Soda Springs
Pop: -
2 facilities · 4 water systems
Twin Falls
Pop: -
7 facilities · 3 water systems
Burley
Pop: -
4 facilities · 6 water systems
Gooding
Pop: -
2 facilities · 2 water systems
Hailey
Pop: -
1 facilities · 5 water systems
Jerome
Pop: -
6 facilities · 5 water systems
Heyburn
Pop: -
1 facilities · 3 water systems
Paul
Pop: -
1 facilities · 1 water systems
Richfield
Pop: -
1 facilities · 1 water systems
Shoshone
Pop: -
1 facilities · 1 water systems
Wendell
Pop: -
1 facilities · 1 water systems
Rupert
Pop: -
1 facilities · 3 water systems
Idaho Falls
Pop: -
8 facilities · 27 water systems
Scoville
Pop: -
1 facilities · 0 water systems
Rexburg
Pop: -
1 facilities · 8 water systems
Salmon
Pop: -
1 facilities · 5 water systems
Frequently Asked Questions
How many polluting facilities are in Idaho? ▼
Idaho has 135 facilities that report to the EPA Toxic Release Inventory (TRI). These facilities have collectively reported 200.0M lbs in total toxic chemical releases. TRI data is self-reported annually by facilities that manufacture, process, or use listed toxic chemicals above threshold amounts.
Does Idaho have Superfund sites? ▼
Yes, Idaho has 12 sites on the EPA Superfund National Priorities List (NPL). Superfund sites are contaminated locations identified for long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
Is the water safe in Idaho? ▼
Idaho has 767 EPA-regulated water systems. 311 water systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental data is available for Idaho? ▼
PlainEnviro provides three categories of EPA environmental data for Idaho: Toxic Release Inventory (TRI) data covering 135 industrial facilities, Safe Drinking Water Information System (SDWIS) data for 767 water systems, and Superfund National Priorities List (NPL) data for 12 contaminated sites.
How does Idaho compare to other states environmentally? ▼
Idaho has 135 TRI facilities with 200.0M lbs in total releases, 12 Superfund sites, and 2,204 water system violations on record. State-level environmental comparisons depend on many factors including industrial activity, population, and geographic size. Source: EPA TRI, SDWIS, and Superfund NPL databases.
Explore More Data for Idaho
TRI Facilities in Idaho →
Every toxic-release facility reporting in the state, ranked by volume
Drinking Water Systems in Idaho →
Community water systems and their violation records
Air Quality in Idaho →
County-level AQI from EPA monitoring stations
Compare states by burden →
EJ screening scores for every U.S. county
State environmental rankings →
How states compare on releases, water and Superfund
Browse all states →
Environmental profiles for every U.S. state
About This Data
This page aggregates environmental data from three EPA programs for Idaho: the Toxic Release Inventory (TRI) for industrial chemical releases, the Safe Drinking Water Information System (SDWIS) for water quality, and the Superfund National Priorities List (NPL) for hazardous waste cleanup sites.
PlainEnviro presents this data without advocacy framing. Numbers reflect reported data and may not capture all environmental activity. For specific health or environmental concerns, contact your state environmental agency.
What to do with Idaho's data
Use this state profile as a starting point, then drill into the specific dataset that matters to you.
- Check the 135 TRI facilities reporting in Idaho for the largest reported releases near a specific county. View facilities
- 311 water systems in the state have a recorded health-based violation, check if yours is one of them. Check water systems
- See how Idaho compares to other states on releases, water violations, and Superfund sites. State rankings
Reported data reflects what facilities and agencies disclose to the EPA; it is not a complete measure of environmental risk or a substitute for local guidance.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial
According to the U.S. Environmental Protection Agency, this state profile is drawn from PlainEnviro's database of more than 25,000 EPA-tracked facilities, the Safe Drinking Water Information System, and the Superfund National Priorities List, compiled since federal reporting began under the Emergency Planning and Community Right-to-Know Act in October 1986; see our methodology for full source citations and refresh cadence.
Every figure on PlainEnviro is rendered directly from EPA environmental compliance data, no number is typed in by an editor. State environmental figures are computed directly from EPA data. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.