EPA · discharge permits by state

Discharge permits in Colorado

8,712Current permits
121Major dischargers
952Individual 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 Colorado’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, 345 cities and 765 watersheds. Each list says which set it covers.

Every permit’s record

Each of the 8,712 current permits in Colorado 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 Colorado, A to Z.

Pages: 1 2 3 4 5 6 7 8 9

By what is permitted in Colorado

By city

The 345 cities with the most permits. All 345 cities in Colorado with 3 or more permits are listed at every city in Colorado.

Watersheds inside Colorado 765

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

All 765 watersheds in Colorado with 3 or more permits are named on one page at every watershed in Colorado.

Other states

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

Permits

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

Permit holder	NPDES ID	City	Program	Discharger	Receiving water
75TH ST WWTP	CO0024147	BOULDER	Publicly owned treatment works	Major	BOULDER CREEK
ASPEN CONSOLIDATED SAN DISTRCT	CO0026387	ASPEN	Publicly owned treatment works	Major	Roaring Fork River
AVON WWTP	CO0024431	EAGLE COUNTY	Publicly owned treatment works	Major	EAGLE RIVER
BERTHOUD TOWN OF WWTP	CO0046663	BERTHOUD	Publicly owned treatment works	Major	Little Thompson River
BIG DRY CREEK WWTF	CO0024171	WESTMINSTER	Publicly owned treatment works	Major	Big Dry Creek and Farmers High Line Canal
BLACK CLOUD MINE	CO0000591	LEADVILLE		Major	Arkansas River
BLACK HAWK/CENTRAL CITY SD WWTF	CO0046761	GILPIN COUNTY	Publicly owned treatment works	Major	CLEAR CREEK
BLUE RIVER WWTF	CO0020826	SILVERTHORNE	Publicly owned treatment works	Major	BLUE RIVER
BOXELDER SANITATION DISTRICT WWTF	CO0020478	FORT COLLINS	Publicly owned treatment works	Major	Boxelder Creek
BROOMFIELD WWTF	CO0026409	ADAMS COUNTY	Publicly owned treatment works	Major	Big Dry Creek and Great Western Reservoir
BRUSH CITY OF	CO0021245	BRUSH	Publicly owned treatment works	Major	SOUTH PLATTE RIVER
BUENA VISTA SANITATION DISTRICT WWTF	CO0045748	BUENA VISTA	Publicly owned treatment works	Major	ARKANSAS RIVER
CARLTON TUNNEL PORTAL SITE	CO0024562	TELLER COUNTY		Major	FOURMILE CREEK
CF&I STEEL LP DBA ROCKY MOUNTAIN STEEL MILLS	CO0000621	PUEBLO		Major	ARKANSAS RIVER
CHEROKEE METRO DISTRICT WATER RECLAMATION FACILITY	COX048348	COLORADO SPRINGS	Publicly owned treatment works	Major	Groundwater
CHEROKEE STATION	CO0001104	DENVER		Major	SOUTH PLATTE RIVER
CITY OF COLORADO SPRINGS	COS000004	COLORADO SPRINGS	Large municipal storm sewer systems	Major	STORMWATER DISCHARGE
CLIFTON SANITATION DISTRICT	CO0033791	CLIFTON	Publicly owned treatment works	Major	COLORADO RIVER
CLIMAX MINE	CO0000248	SUMMIT COUNTY		Major	TENMILE CREEK, BLUE RIVER
COLO DEPT OF TRANSPORTATION	COS000005	DENVER	Large municipal storm sewer systems	Major	101900020904
COMANCHE STATION	CO0000612	PUEBLO		Major	ST. CHARLES RIVER
COPPER MOUNTAIN CONSOLIDATED METRO DISTRICT	CO0021598	COPPER MOUNTAIN	Publicly owned treatment works	Major	TENMILE CREEK
CRAIG CITY OF	CO0040037	CRAIG	Publicly owned treatment works	Major	Yampa River
CRESSON PROJECT	CO0043648	TELLER COUNTY		Major	CRIPPLE CREEK
CRIPPLE CREEK CITY OF	CO0039900	CRIPPLE CREEK	Publicly owned treatment works	Major	Cripple Creek
DEL NORTE WWTF	CO0020281	DEL NORTE	Publicly owned treatment works	Major	RIO GRANDE RIVER
DELTA WWTF	CO0039641	DELTA COUNTY	Publicly owned treatment works	Major	GUNNISON RIVER
DENVER CITY & COUNTY OF	COS000001	DENVER	Large municipal storm sewer systems	Major	SAND/CHERRY/BEAR CREEKS/S. PLATTE R
DRAKE WWTP	CO0047627	FORT COLLINS	Publicly owned treatment works	Major	Cache La Poudre River
DURANGO CITY OF	CO0024082	DURANGO	Publicly owned treatment works	Major	ANIMAS RIVER
EAGLE MINE REMEDIATION WWTP	CO0042480	MINTURN		Major	Eagle River
EDWARDS WWTF	CO0037311	EAGLE COUNTY	Publicly owned treatment works	Major	EAGLE RIVER
ERIE NORTH WATER RECLAMATION FACILITY	CO0048445	WELD COUNTY	Publicly owned treatment works	Major	Boulder Creek
ERIE WWTF	CO0045926	ERIE	Publicly owned treatment works	Major	COAL CREEK
ESTES PARK SANITATION DISTRICT	CO0020290	ESTES PARK	Publicly owned treatment works	Major	BIG THOMPSON RIVER
EVANS CITY OF WWTF	CO0020508	WELD COUNTY	Publicly owned treatment works	Major	SOUTH PLATTE RIVER
FARMERS KORNER WWTF	CO0021539	SUMMIT COUNTY	Publicly owned treatment works	Major	DILLON RESERVOIR
FORT LUPTON WWTF	CO0021440	FORT LUPTON	Publicly owned treatment works	Major	SOUTH PLATTE RIVER
FORT MORGAN CITY OF	CO0044849	MORGAN COUNTY	Publicly owned treatment works	Major	SOUTH PLATTE RIVER
FORT MORGAN FACILITY	CO0041351	MORGAN COUNTY		Major	TRIB TO THE SOUTH PLATTE RIVER

What this page shows

This page covers Clean Water Act discharge permits under the EPA NPDES register for CO. It lists 8,712 permits, including 121 majors and 952 individuals.