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Kusilvak Census Area, AK

Low Risk (15/100)

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 Kusilvak Census Area in Alaska · Population: 8,277

SDWIS systems such as CITY OF HOOPER BAY; CHEVAK WATER SYSTEM; MOUNTAIN VILLAGE WATER SYSTEM anchor Kusilvak 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 Kusilvak Census Area in this extract; water coverage still lists CITY OF HOOPER BAY; CHEVAK WATER SYSTEM; MOUNTAIN VILLAGE WATER SYSTEM. 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 Kusilvak 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.

County population (Census ACS)
8,277
TRI Facilities
0
Water Systems
12
Superfund Sites
0
Total Releases
0 lbs

Water Systems (12)

System System pop (SDWIS) Violations
CITY OF HOOPER BAY 1,200 9
CHEVAK WATER SYSTEM 938 3
MOUNTAIN VILLAGE WATER SYSTEM 850 21
EMMONAK WATER SYSTEM 820 43
SCAMMON BAY WATER SYSTEM 637 34
PILOT STATION WATER SYSTEM 580 5
ALAKANUK WATER SYSTEM 570 15
ST. MARYS WATER SYSTEM 548 16
MARSHALL WATER SYSTEM 308 3
NUNAM IQUA WATER SYSTEM 213 75
PITKA'S POINT PIPED WATER SYSTEM 109 2
FAA BETHEL WELL 25 2

Cities in Kusilvak Census Area (11)

Alakanuk
0 facilities · 1 water
Chevak
0 facilities · 1 water
Emmonak
0 facilities · 1 water
Hooper Bay
0 facilities · 1 water
Marshall
0 facilities · 1 water
Mountain Village
0 facilities · 1 water
Nunam Iqua
0 facilities · 1 water
Pilot Station
0 facilities · 1 water
Pitka's Point
0 facilities · 1 water
Saint Marys
0 facilities · 1 water
Scammon Bay
0 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in Kusilvak Census Area, Alaska? ▼
Kusilvak Census Area, AK has an environmental risk score of 15/100 (Low Risk), based on 0 TRI facilities, 0 Superfund sites, and 12 water systems on record. 12 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Kusilvak Census Area? ▼
No Superfund National Priorities List (NPL) sites are currently registered in Kusilvak Census Area, AK in the EPA database.
How many toxic release facilities are in Kusilvak Census Area? ▼
Kusilvak Census Area, AK has 0 TRI-reporting facilities on record with the EPA Toxic Release Inventory. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Kusilvak Census Area? ▼
Air quality monitoring data (EPA AQS) is not available for Kusilvak Census Area, AK. This may indicate no EPA monitoring stations are located in the county. For regional air quality data, see the state environmental profile or visit EPA's AirNow.gov.
Is the drinking water safe in Kusilvak Census Area? ▼
Kusilvak Census Area, AK has 12 EPA-regulated water systems. 12 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 agencies cover Kusilvak Census Area? ▼
Environmental compliance in Kusilvak Census Area, Alaska is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Alaska state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

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.

Related Guides

Understanding EPA Data
How EPA collects and publishes environmental data
Environmental Justice
Who lives near polluters and environmental hazards
How to Check Environmental Quality
Step-by-step guide to checking your local environment

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro