EPA-regulated facilities in Penobscot County, ME

There are 4,663 EPA-regulated facilities inside Penobscot County, Maine. The most common kinds are drinking water systems (3,537), hazardous waste (569), water discharge (471). 6 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 55 have a violation on record. Penalties over the last five years total $5.5M across 4 sites.

Open the map of Penobscot County

4,663facilities in the county
6in significant noncompliance
55with a violation on record
$5.5Min penalties, last 5 years

By category

CategoryFacilities
Hazardous waste569
Treatment, storage or disposal1
Large quantity generators17
Small quantity generators272
Transporters5
Chemical (RMP/TRI)30
Superfund15
Air emissions209
Major sources15
Synthetic minor sources49
Minor sources77
Water discharge471
Major permits10
Minor permits281
Drinking water systems3,537
Greenhouse gas reporters9
Scrap yards2
Recycling centers6

A facility enrolled in several programs counts once in the total and once in each of its categories.

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

Largest penalties

Penalties assessed over the last five years.

Superfund sites

Towns in Penobscot County

Bordering counties

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.