Hancock, ME
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 Hancock in Maine · Population: 56,084
Hancock, ME is tracked across three EPA datasets covering 3 Toxics Release Inventory (TRI) facilities, 23 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 33/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 35.1K lbs of reported toxic releases under EPCRA Section 313, while 11 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 37 and a peak AQI of 105 in 2024, with 91% 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 | 334 (91%) | 31 | 1 | 105 |
| 2023 | 314 (86%) | 51 | 0 | 93 |
| 2022 | 326 (90%) | 34 | 1 | 112 |
| 2021 | 324 (89%) | 38 | 3 | 133 |
| 2020 | 336 (92%) | 29 | 1 | 105 |
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 Maine, see the EPA's AirNow.gov.
Water Systems (23)
| System | Population | Violations |
|---|---|---|
| TOWN OF BAR HARBOR- WATER DIVISION | 4,443 | 0 |
| ELLSWORTH WATER DEPARTMENT | 3,910 | 21 |
| SOUTHWEST HARBOR WATER & SEWER DISTRICT | 2,480 | 7 |
| MOUNT DESERT WATER DIST NORTH | 1,623 | 0 |
| CASTINE WATER DEPARTMENT | 983 | 0 |
| MOUNT DESERT WATER DIST -SEAL | 865 | 0 |
| WINTER HARBOR WATER DISTRICT | 700 | 0 |
| FRANKLIN WATER DEPARTMENT | 443 | 1 |
| LONG POND WATER DISTRICT | 308 | 56 |
| COLD SPRING WATER COMPANY | 305 | 0 |
| PARKER RIDGE RETIREMENT COMMUNITY | 120 | 0 |
| SILVER LAKE ESTATES | 110 | 0 |
| BIRCH TREE MEADOWS MHP | 105 | 3 |
| INDIAN RUN ESTATES LLC | 103 | 0 |
| UNITY BY THE STREAM LLC | 88 | 41 |
| HANCOCK VILLAGE MHP | 73 | 3 |
| HOLDEN SQUARE APARTMENTS | 63 | 2 |
| BLUE HILL TERRACE | 60 | 6 |
| CRESCENT MOBILE HOME PARK | 55 | 0 |
| TOWN & COUNTRY MOTEL APARTMENTS | 44 | 0 |
| STONINGTON MANOR | 44 | 6 |
| BIRCH HAVEN TRAILER PARK | 43 | 3 |
| SOUTH PENOBSCOT WATER ASSOCIATION | 38 | 0 |
TRI Facilities (3)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Hinckley Co | 34.5K lbs |
| 2 | Penobscot Bay Terminals DBA Webber Tanks Inc | 585 lbs |
| 3 | Rtwb Llc. | 0 lbs |
Cities in Hancock (4)
Frequently Asked Questions
What is the environmental risk level in Hancock, Maine? ▼
Are there Superfund sites in Hancock? ▼
How many toxic release facilities are in Hancock? ▼
What is the air quality in Hancock? ▼
Is the drinking water safe in Hancock? ▼
What environmental agencies cover Hancock? ▼
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.