Denali Borough, AK
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 Denali Borough in Alaska · Population: 2,029
TRI sites such as Golden Valley Electric Assoc Healy Power Plant; Usibelli Coal Mine Inc.; SDWIS systems such as CLEAR SPACE FORCE STATION MAIN; DENALI - ROCK CREEK HQ. anchor Denali Borough, AK's EPA extract. Derived burden score 28/100 (Low 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 Denali Borough include DENALI - ROCK CREEK HQ., while Golden Valley Electric Assoc Healy Power Plant leads reported TRI pounds among local Form R filers. AQS median AQI 35 / peak 77 in 2024.
Burden score 28/100 (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 Denali Borough -- 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 Denali Borough, AK: EPA TRI 2023 reporting year
Same facilities, both years
-24.7%
2 facilities that filed in 2022 and 2023
Whole inventory
-24.7%
722.9 thousand lb → 544.7 thousand lb, every facility that filed
- Denali Borough, AK's total reported releases fell from 722.9 thousand lb in 2022 to 544.7 thousand lb in 2023, based on EPA TRI filings.
- Denali Borough, AK's off-site transfers fell from 530.0 thousand lb in 2022 to 277.5 thousand lb in 2023, based on EPA TRI filings.
- Denali Borough, AK's land releases rose from 191.4 thousand lb in 2022 to 265.9 thousand lb in 2023, based on EPA TRI filings.
- Denali Borough, AK's chemicals reported fell from 13 in 2022 to 11 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 | 357 (99%) | 5 | 0 | 77 |
| 2023 | 350 (100%) | 0 | 0 | 50 |
| 2022 | 328 (97%) | 10 | 0 | 82 |
| 2021 | 360 (99%) | 3 | 0 | 74 |
| 2020 | 356 (99%) | 2 | 0 | 54 |
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 Alaska, see the EPA's AirNow.gov.
Water Systems (2)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CLEAR SPACE FORCE STATION MAIN | 433 | 0 |
| DENALI - ROCK CREEK HQ. | 300 | 3 |
TRI Facilities (2)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Golden Valley Electric Assoc Healy Power Plant | 2.3M lbs |
| 2 | Usibelli Coal Mine Inc. | 941.0K lbs |
Cities in Denali Borough (3)
Frequently Asked Questions
What is the environmental risk level in Denali Borough, Alaska? ▼
Are there Superfund sites in Denali Borough? ▼
How many toxic release facilities are in Denali Borough? ▼
What is the air quality in Denali Borough? ▼
Is the drinking water safe in Denali Borough? ▼
What environmental agencies cover Denali Borough? ▼
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.