Twin Falls, 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 Twin Falls in Idaho · Population: 92,121
TRI sites such as Amalgamated Sugar Co; Glanbia Foods Inc; Lamb Weston Inc; SDWIS systems such as TWIN FALLS CITY OF; KIMBERLY CITY OF; BUHL CITY OF anchor Twin Falls, ID's EPA extract. Derived burden score 39/100 (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 Twin Falls include KIMBERLY CITY OF; FILER WATER WORKS; HANSEN CITY OF, while Amalgamated Sugar Co leads reported TRI pounds among local Form R filers. AQS median AQI 23 / peak 158 in 2024.
Burden score 39/100 (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 Twin Falls -- 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 Twin Falls, ID: EPA TRI 2023 reporting year
Same facilities, both years
+7.9%
5 facilities that filed in 2022 and 2023
Whole inventory
+7.9%
484.5 thousand lb → 522.9 thousand lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Twin Falls, ID's total reported releases rose from 484.5 thousand lb in 2022 to 522.9 thousand lb in 2023, based on EPA TRI filings.
- Twin Falls, ID's water releases fell from 16 lb in 2022 to 0 lb in 2023, based on EPA TRI filings.
- Twin Falls, ID's off-site transfers rose from 19.3 thousand lb in 2022 to 27.8 thousand lb in 2023, based on EPA TRI filings.
- Twin Falls, ID's land releases rose from 54.9 thousand lb in 2022 to 63.1 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 | 264 (76%) | 76 | 4 | 158 |
| 2023 | 328 (95%) | 16 | 0 | 80 |
| 2022 | 280 (79%) | 71 | 1 | 155 |
| 2021 | 298 (83%) | 56 | 7 | 144 |
| 2020 | 313 (86%) | 44 | 3 | 163 |
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 (18)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| TWIN FALLS CITY OF | 56,121 | 0 |
| KIMBERLY CITY OF | 5,359 | 3 |
| BUHL CITY OF | 4,518 | 0 |
| FILER WATER WORKS | 2,858 | 23 |
| HANSEN CITY OF | 1,200 | 2 |
| HAGERMAN CITY OF | 988 | 0 |
| CASTLEFORD CITY OF | 275 | 0 |
| HOLLISTER CITY OF | 220 | 0 |
| KANAKA RAPIDS RANCH WATER SYSTEM INC | 220 | 2 |
| ROCK LEDGE ESTATES | 150 | 0 |
| MEANDER POINT SUBD | 140 | 12 |
| ROGERSON WATER DIST | 75 | 1 |
| NIELSONS COUNTRY COURT | 70 | 1 |
| CLEAR LAKE RANCH P U D | 54 | 4 |
| SPORTSMANS RIVER RESORT | 50 | 0 |
| NORTHVIEW SUBDIVISION | 47 | 0 |
| RIVERSIDE TRAILER COURT | 35 | 6 |
| REST EZ RV PARK | 25 | 2 |
TRI Facilities (7)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Amalgamated Sugar Co | 2.4M lbs |
| 2 | Glanbia Foods Inc | 485.0K lbs |
| 3 | Lamb Weston Inc | 90.8K lbs |
| 4 | Lippert Components - Twin Falls #64 | 5.8K lbs |
| 5 | Chobani Idaho | 2.7K lbs |
| 6 | Twin Falls Redi-Mix | 288 lbs |
| 7 | Jd Heiskell & Co | 0 lbs |
Cities in Twin Falls (9)
Frequently Asked Questions
What is the environmental risk level in Twin Falls, Idaho? ▼
Are there Superfund sites in Twin Falls? ▼
How many toxic release facilities are in Twin Falls? ▼
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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.