Yukon-Koyukuk 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 Yukon-Koyukuk Census Area in Alaska · Population: 5,271
SDWIS systems such as DOYON UTILITIES JBER - RICHARDSON; FT WAINWRIGHT - MAIN POST; FT. GREELY - MAIN POST anchor Yukon-Koyukuk Census Area, AK's EPA extract. Derived burden score 15/100 (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 Yukon-Koyukuk Census Area in this extract; water coverage still lists DOYON UTILITIES JBER - RICHARDSON; FT WAINWRIGHT - MAIN POST; FT. GREELY - MAIN POST. No AQS county monitors report here.
Burden score 15/100 (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 Yukon-Koyukuk 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 (31)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| DOYON UTILITIES JBER - RICHARDSON | 20,284 | 0 |
| FT WAINWRIGHT - MAIN POST | 20,076 | 0 |
| FT. GREELY - MAIN POST | 1,257 | 0 |
| FT. YUKON PUBLIC WATER SYSTEM | 665 | 0 |
| GALENA WTP1 - CITY | 490 | 82 |
| NENANA MUNICIPAL WATER | 486 | 0 |
| MCGRATH WATER SYSTEM | 341 | 38 |
| HUSLIA PUBLIC WATER SYSTEM | 323 | 1 |
| GALENA WTP2 - GILA | 290 | 0 |
| TOO'GHA INC - IN TANANA | 271 | 24 |
| NULATO RIVER WELL | 245 | 3 |
| RUBY WATER SYSTEM | 215 | 5 |
| KALTAG PUBLIC WATER SYSTEM | 214 | 15 |
| GRAYLING WATER SYSTEM | 207 | 120 |
| MINTO COMMUNITY WATER SYSTEM | 205 | 17 |
| HOLY CROSS WATER SYSTEM | 182 | 1 |
| VENETIE WATER SYSTEM | 181 | 7 |
| ARCTIC VILLAGE WATER SYSTEM | 175 | 8 |
| ALLAKAKET PUBLIC WATER SYSTEM | 135 | 5 |
| CIRCLE WASHETERIA | 110 | 9 |
| HUGHES PUBLIC WATER SUPPLY | 107 | 12 |
| RAINBOW VALLEY MHP | 105 | 10 |
| ANVIK WATER SYSTEM | 96 | 4 |
| MANLEY COMMUNITY WATER SYSTEM | 95 | 2 |
| RAMPART WASHETERIA | 88 | 9 |
| KOYUKUK SAFEWATER FACILITY | 85 | 14 |
| BEAVER WATER SYSTEM | 80 | 1 |
| CHALKYITSIK VILLAGE WATER | 76 | 92 |
| TAKOTNA WATER SYSTEM | 70 | 0 |
| SHAGELUK WATER SYSTEM | 60 | 13 |
| STEVENS VILLAGE WATER SYSTEM | 28 | 4 |
Cities in Yukon-Koyukuk Census Area (25)
Frequently Asked Questions
What is the environmental risk level in Yukon-Koyukuk Census Area, Alaska? ▼
Are there Superfund sites in Yukon-Koyukuk Census Area? ▼
How many toxic release facilities are in Yukon-Koyukuk Census Area? ▼
What is the air quality in Yukon-Koyukuk Census Area? ▼
Is the drinking water safe in Yukon-Koyukuk Census Area? ▼
What environmental agencies cover Yukon-Koyukuk 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.