Matanuska-susitna Borough, AK
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.
Environmental data for Matanuska-susitna Borough in Alaska · Population: 110,677
Matanuska-susitna Borough, AK is tracked across three EPA datasets covering 1 Toxics Release Inventory (TRI) facility, 45 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 29/100 (Low Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 4.6K lbs of reported toxic releases under EPCRA Section 313, while 23 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 15 and a peak AQI of 95 in 2024, with 92% of observed days rated "Good" (0–50).
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
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 | 331 (92%) | 28 | 0 | 95 |
| 2023 | 317 (89%) | 40 | 1 | 102 |
| 2022 | 301 (88%) | 40 | 0 | 89 |
| 2021 | 307 (87%) | 44 | 2 | 163 |
| 2020 | 317 (88%) | 41 | 1 | 103 |
Source: EPA Air Quality System (AQS) Annual AQI by County 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 (45)
| System | Population | Violations |
|---|---|---|
| WASILLA WATER SYSTEM | 18,492 | 1 |
| PALMER WATER SYSTEM | 8,111 | 0 |
| TALKEETNA WATER SYSTEM | 1,850 | 0 |
| VALLEY UTILITIES LLC | 1,590 | 0 |
| COUNTRY FIELD WATER CO. | 1,166 | 2 |
| EQUESTRIAN ACRES | 950 | 5 |
| VICTORIA ESTATES | 912 | 1 |
| TRAPPER CREEK WATERING POINT | 500 | 0 |
| SAND LAKE SERVICES | 465 | 0 |
| MEADOW BROOK SUBDIVISION | 465 | 19 |
| PIONEER MEADOWS SUBDIVISION | 435 | 0 |
| SILVER CREEK SPRINGS SD | 239 | 2 |
| WESTWOOD WATER COMPANY INC | 180 | 1 |
| NORTHERN LIGHTS TERRACE | 168 | 1 |
| MAJESTIC HILLS SUBDIVISION | 168 | 2 |
| BIRCH RUN ESTATES | 167 | 0 |
| VIEW POINTE AT THE RANCH | 155 | 0 |
| MOUNTAIN VIEW ESTATES | 150 | 4 |
| HILL TIMBER ESTATES | 120 | 0 |
| ELSINORE ESTATES SUBDIVISION | 120 | 1 |
| VICTORY BIBLE CAMP SPRING | 110 | 4 |
| WINTER ROSE MULTIFAMILY HOUSING | 100 | 0 |
| BLUFF VIEW ACRES WATER SYSTEM | 100 | 41 |
| QUIET CIRCLE APARTMENTS | 90 | 20 |
| ARKOSE WOODS | 90 | 0 |
| PALMER CORRECTIONAL CENTER | 90 | 0 |
| CAMERON ACRES | 80 | 9 |
| SETTLERS BAY CONDOS | 80 | 1 |
| GEMSTONE ESTATES | 75 | 0 |
| WASILLA LACY LAINE SD | 75 | 4 |
| NORTHWOOD APARTMENTS | 72 | 4 |
| EMERALD RIVER ESTATES | 62 | 0 |
| TIMBER RIDGE CONDOMINIUMS | 60 | 0 |
| ALPINE VIEW SUBDIVISION | 50 | 0 |
| FORTY NINER HOMEOWNERS ASSOC. | 39 | 0 |
| IRIS CIRCLE WATER CORPORATION | 37 | 0 |
| TWIN PEAKS | 37 | 3 |
| CAMWELL ON THE GREEN (MHP) | 33 | 1 |
| SNOWSHOE ACRES LLC | 32 | 2 |
| CENTRAL COMMERCIAL PARK | 32 | 1 |
| MOUNTAIN GLORY SUBDIVISION | 32 | 0 |
| HERITAGE PARK | 30 | 0 |
| JUNE LAKE AIRPARK SUBDIVISION | 26 | 0 |
| BIRCHVIEW TOWNHOME CONDOS | 25 | 4 |
| BERRY BLUFF COMMUNITY WATER SYSTEM | 25 | 0 |
TRI Facilities (1)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Crowley Palmer Facility | 4.6K lbs |
Cities in Matanuska-susitna Borough (1)
Frequently Asked Questions
What is the environmental risk level in Matanuska-susitna Borough, Alaska? ▼
Are there Superfund sites in Matanuska-susitna Borough? ▼
How many toxic release facilities are in Matanuska-susitna Borough? ▼
What is the air quality in Matanuska-susitna Borough? ▼
Is the drinking water safe in Matanuska-susitna Borough? ▼
What environmental agencies cover Matanuska-susitna 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.