EPA · discharge permits by state

Discharge permits in Connecticut

1,045Current permits
86Major dischargers
426Individual permits

A major discharger is one EPA rates as significant on volume, toxicity or the water it reaches; the rest are minors. An individual permit is written for one operation, while general permit coverage applies a statewide permit to a site that qualifies for it.

This page gathers Connecticut’s current permits three ways below — by the program they are issued under, by the city of the discharge, and by watershed. It names 7 programs, 111 cities and 141 watersheds. Each list says which set it covers.

Every permit’s record

Each of the 1,045 current permits in Connecticut has a record page: the permittee, the receiving water, the status and dates, and its effluent limits and exceedances. Each city below lists its own; or every permit in Connecticut, A to Z.

Pages: 1 2

By what is permitted in Connecticut

By city

The 111 cities with the most permits. All 111 cities in Connecticut with 3 or more permits are listed at every city in Connecticut.

Watersheds inside Connecticut 141

Every watershed with three or more permits in Connecticut, most permits first.

All 141 watersheds in Connecticut with 3 or more permits are named on one page at every watershed in Connecticut.

Other states

Every state carrying three or more current permits, in alphabetical order.

Permits

Major dischargers first. Not every permit in Connecticut is listed here.

Permit holder	NPDES ID	City	Program	Discharger	Receiving water
AHLSTROM NONWOVENS LLC	CT0000434	WINDSOR LOCKS		Major	CONNECTICUT RIVER
ALLEGHENY LUDLUM CORPORATION	CT0003701	WALLINGFORD		Major	QUINNIPIAC RIVER
ALLNEX USA INCORPORATED	CT0000086	WALLINGFORD		Major	QUINNIPIAC RIVER
ANSONIA COPPER & BRASS INC.	CT0002968	ANSONIA		Major	NAUGATUCK RIVER
ANSONIA WPCA, CITY OF	CT0100013	ANSONIA	Publicly owned treatment works	Major	NAUGATUCK RIVER
AUTO SWAGE PRODUCTS, INC.	CT0020826	SHELTON		Major	HOUSATONIC RIVER
BRANFORD WPCF	CT0100048	BRANFORD	Publicly owned treatment works	Major	BRANFORD HARBOR
BRIDGEPORT EAST SIDE WPCF	CT0101010	BRIDGEPORT	Publicly owned treatment works	Major	POQUONNOCK RIVER
BRIDGEPORT HARBOR STATION UNITS 1-4	CT0003778	BRIDGEPORT		Major	BRIDGEPORT HARBOR
BRIDGEPORT WESTSIDE WPCA	CT0100056	BRIDGEPORT	Publicly owned treatment works	Major	CEDAR CREEK/LONG ISLAND SOUND
BRISTOL WATER RECLAMATION FACILITY	CT0100374	BRISTOL	Publicly owned treatment works	Major	PEQUABUCK RIVER
CHESHIRE WPCF	CT0100081	CHESHIRE	Publicly owned treatment works	Major	QUINNIPIAC RIVER
CITY OF STAMFORD WPCF	CT0101087	STAMFORD	Publicly owned treatment works	Major	STAMFORD HARBOR
CITY OF TORRINGTON	CT0100579	TORRINGTON	Publicly owned treatment works	Major	NAUGATUCK RIVER
DANBURY WPCF	CT0100145	DANBURY	Publicly owned treatment works	Major	STILL RVR(E. SWAMP/LIMEKILN BROOKS)
DERBY, CITY OF WPCF	CT0100161	DERBY	Publicly owned treatment works	Major	HOUSATONIC RIVER
DEVON POWER, LLC	CT0003107	MILFORD		Major	HOUSATONIC RIV
DUNN PAPER - EAST HARTFORD, LLC	CT0002127	EAST HARTFORD		Major	HOCKANUM RIVER
EAST HAMPTON WPCA	CT0024694	EAST HAMPTON	Publicly owned treatment works	Major	CONNECTICUT RIVER
EAST HARTFORD WPCF_(MDC)	CT0100170	EAST HARTFORD	Publicly owned treatment works	Major	HOCKANUM RIVER
EAST WINDSOR WPCF	CT0100196	EAST WINDSOR	Publicly owned treatment works	Major	CONNECTICUT RIVER
ELECTRIC BOAT CORPORATION	CT0003824	GROTON		Major	THAMES RIVER
ENFIELD POTW, TOWN OF	CT0100200	ENFIELD	Publicly owned treatment works	Major	CONNECTICUT RIVER
FAIRFIELD WPCF	CT0101044	FAIRFIELD	Publicly owned treatment works	Major	LONG ISLAND SOUND
FARMINGTON WPCF	CT0100218	FARMINGTON	Publicly owned treatment works	Major	FARMINGTON RIVER
GLASTONBURY WPCF	CT0100226	GLASTONBURY	Publicly owned treatment works	Major	CONNECTICUT RIVER
GREENWICH WPCF	CT0100234	GREENWICH	Publicly owned treatment works	Major	GREENWICH HARBOR
GROTON WPCA , CITY OF	CT0101184	GROTON	Publicly owned treatment works	Major	THAMES RIVER
GROTON WPCF	CT0100242	GROTON	Publicly owned treatment works	Major	THAMES RIVER
HARTFORD WPCF	CT0100251	HARTFORD	Publicly owned treatment works	Major	CONNECTICUT RIVER
HOUSATONIC WPCF	CT0101656	MILFORD	Publicly owned treatment works	Major	HOUSATONIC RIVER
JEWETT CITY WPCF	CT0100269	JEWETT CITY	Publicly owned treatment works	Major	QUINEBAUG RIVER
KILLINGLY WPCF TOWN OF	CT0101257	DANIELSON	Publicly owned treatment works	Major	QUINEBAUG RIVER
KIMBERLY-CLARK CORPORATION	CT0003212	NEW MILFORD		Major	HOUSATONIC RIVER
MANCHESTER WPCF	CT0100293	MANCHESTER	Publicly owned treatment works	Major	HOCKANUM RIVER
MATTABASSETT DISTRICT CROMWELL	CT0100307	CROMWELL	Publicly owned treatment works	Major	CONNECTICUT RIVER
MERIDEN WPCF	CT0100315	MERIDEN	Publicly owned treatment works	Major	QUINNIPIAC RIVER
MIDDLETOWN POWER LLC	CT0003883	MIDDLETOWN		Major	CONNECTICUT RIVER
MILFORD BEAVERBROOK WPCF	CT0100749	MILFORD	Publicly owned treatment works	Major	HOUSATONIC RIVER
MILFORD POWER COMPANY, LLC	CT0030309	MILFORD		Major	Housatonic River

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