Aleutians West Census Area, 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 Aleutians West Census Area in Alaska · Population: 5,178
SDWIS systems such as UNALASKA WATER SYSTEM; SAINT PAUL WATER SYSTEM; ADAK UTILITIES; NPL sites such as Adak Naval Air Station anchor Aleutians West Census Area, AK's EPA extract. Derived burden score 17/100 (Low Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
No TRI Form R facilities sit in Aleutians West Census Area in this extract; water coverage still lists UNALASKA WATER SYSTEM; SAINT PAUL WATER SYSTEM; ADAK UTILITIES. No AQS county monitors report here.
Burden score 17/100 (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 Aleutians West Census Area -- 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.
Water Systems (5)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| UNALASKA WATER SYSTEM | 9,400 | 0 |
| SAINT PAUL WATER SYSTEM | 380 | 7 |
| ADAK UTILITIES | 325 | 19 |
| ATKA | 50 | 7 |
| NIKOLSKI VILLAGE | 34 | 1 |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Adak Naval Air Station | NPL Site | 51.37 |
Cities in Aleutians West Census Area (5)
Frequently Asked Questions
What is the environmental risk level in Aleutians West Census Area, Alaska? ▼
Are there Superfund sites in Aleutians West Census Area? ▼
How many toxic release facilities are in Aleutians West Census Area? ▼
What is the air quality in Aleutians West Census Area? ▼
Is the drinking water safe in Aleutians West Census Area? ▼
What environmental agencies cover Aleutians West Census Area? ▼
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.