Clean Water Act discharge permit · NPDES ME0036188

CASCO BAY ENERGY COMPANY LLC, Veazie, ME: NPDES ME0036188 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
8Pollutants under a numeric limit
0Pollutants with an effluent exceedance
1Inspections on file
0Formal enforcement actions

CASCO BAY ENERGY COMPANY LLC, held by CASCO BAY ENERGY COMPANY, LLC, holds NPDES permit ME0036188, which discharges to Penobscot River. EPA’s file records it issued September 1, 2016 and expiring August 31, 2021.

CASCO BAY ENERGY COMPANY LLC, Veazie, Maine: Individual permit ME0036188, held by CASCO BAY ENERGY COMPANY, LLC; Administratively continued (past its expiration date and still in force until reissued); issued September 1, 2016, term to August 31, 2021; discharges to Penobscot River; Hydroelectric Power Generation.

Solids, total suspended: 4 limits, 88 violations of any kind, 0 effluent exceedances.
Chlorine, free available: 2 limits, 44 violations of any kind, 0 effluent exceedances.
Oil & Grease: 2 limits, 24 violations of any kind, 0 effluent exceedances.
Chromium, total [as Cr]: 2 limits, 24 violations of any kind, 0 effluent exceedances.
Zinc, total [as Zn]: 2 limits, 24 violations of any kind, 0 effluent exceedances.
pH: 2 limits, 22 violations of any kind, 0 effluent exceedances.
Temperature, water deg. fahrenheit: 1 limit, 22 violations of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 1 limit, 22 violations of any kind, 0 effluent exceedances.

February 25, 2026: Reconnaissance without Sampling (S).

CASCO BAY ENERGY COMPANY LLC among its neighbors

EPA’s permit file holds 15 discharge permits in the Felts Brook-Penobscot River subwatershed (HUC 010200051003), ME0036188 among them. Its county holds 80, 9 of them major permits; ME0036188 is a major permit.

Other permits in the Felts Brook-Penobscot River subwatershed (HUC 010200051003)

BANGOR CITY OF, Bangor: MEL100781, minor permit, permit term to December 31, 2025
BANGOR INTERNATIONAL AIRPORT, Bangor: MER05B733, minor permit, discharging to Birch Stream, permit term to April 25, 2016
BANGOR WWTF, Bangor: ME0100781, major permit, discharging to Penobscot River, permit term to June 30, 2021
BREWER CITY OF, Brewer: MEL100072, minor permit, permit term to December 31, 2025
BREWER LANDFILL/RECYCLING, Brewer: MER05B174, minor permit, discharging to Felts Brook, permit term to April 25, 2016
BREWER WWTF, Brewer: ME0100072, major permit, discharging to Penobscot River, permit term to May 31, 2021
COLD BROOK ENERGY INC., Hampden: ME0002267, minor permit, discharging to Penobscot River, permit term to December 31, 2016
EASTERN MAINE COMMUNITY COLLEGE CAMPUS WIDE MS4 STORMWATER GENERAL PERMIT, Bangor: MER042008, minor permit, permit term to June 26, 2018
HAMLIN'S MARINA HAMPDEN, Hampden: MER05C031, minor permit, discharging to Penobscot River, Tidewater, permit term to April 25, 2016
HARTT TRANSPORTATION SYSTEMS INC, Bangor: MER05B337, minor permit, permit term to April 25, 2016

Identity

Facility as filed	CASCO BAY ENERGY COMPANY LLC
Permittee as filed	CASCO BAY ENERGY COMPANY, LLC
NPDES ID	ME0036188
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Not a publicly owned treatment works
Issued	September 1, 2016
Expiration date	August 31, 2021
Address	Veazie, ME 04401
Receiving water	Penobscot River
Subwatershed	Felts Brook-Penobscot River (HUC 010200051003)
NAICS	221111 – Hydroelectric Power Generation
SIC	4911 – Electric Services
Other EPA IDs (FRS)	RCRA handler MER000002717; ICIS-AIR source ME0000002301900666

Effluent limits and exceedances

8Pollutants on file
8Under a numeric limit
8With a violation of any kind
0With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind
Solids, total suspended	4	88
Chlorine, free available	2	44
Oil & Grease	2	24
Chromium, total [as Cr]	2	24
Zinc, total [as Zn]	2	24
pH	2	22
Temperature, water deg. fahrenheit	1	22
Flow, in conduit or thru treatment plant	1	22

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES ME0036188.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES ME0036188.

Inspections

Date	What EPA recorded	Agency
February 25, 2026	Reconnaissance without Sampling	S

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES ME0036188.

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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers Clean Water Act NPDES permit ME0036188, held by CASCO BAY ENERGY COMPANY LLC of Veazie, ME, which discharges to the Penobscot River and is classed as a Major Discharger. The page lists 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance, with the permit shown as administratively continued after its August 31, 2021 expiration date.