U.S. water systems

Wyoming Water Systems

Wyoming

632 community water systems on record — 323 active, 309 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Wyoming’s official records. Always confirm current status with Wyoming before making decisions based on this information.

All community water systems in Wyoming

System name	Mailing city	Population served	Status
CHEYENNE BOARD OF PUBLIC UTILITIES	CHEYENNE	64,165	Active
CASPER, CITY OF	CASPER	59,000	Active
LARAMIE, CITY OF	LARAMIE	32,395	Active
GILLETTE, CITY OF	GILLETTE	32,222	Active
JACKSON, TOWN OF	JACKSON	24,760	Active
ROCK SPRINGS, CITY OF	ROCK SPRINGS	24,000	Active
SHERIDAN, CITY OF	SHERIDAN	22,700	Active
EVANSTON, CITY OF	EVANSTON	11,727	Active
GREEN RIVER, CITY OF	GREEN RIVER	10,500	Active
RIVERTON, CITY OF	RIVERTON	10,330	Active
CODY, CITY OF	CODY	10,224	Active
SOUTH CHEYENNE WATER & SEWER DISTRICT	CHEYENNE	10,000	Active
RAWLINS WATER SUPPLY, CITY OF	RAWLINS	9,006	Active
YNP-OLD FAITHFUL	YELLOWSTONE	7,675	Active
LANDER, CITY OF	LANDER	7,615	Active
NORTHWEST RURAL WATER DISTRICT	CODY	7,330	Active
TORRINGTON MUNICIPAL WATER DEPT, CITY OF	TORRINGTON	6,847	Active
DOUGLAS, CITY OF	DOUGLAS	6,400	Active
POWELL, CITY OF	POWELL	6,310	Active
YNP - LAKE VILLAGE	YELLOWSTONE	5,925	Active
USAF F.E. WARREN AFB	F.E. WARREN AFB	5,500	Active
WORLAND UTILITIES COMMISSION	WORLAND	4,787	Active
GTNP-COLTER BAY VILLAGE	MOOSE	4,514	Active
BUFFALO, CITY OF	BUFFALO	4,419	Active
MILLS-WARDWELL JPB	MILLS	4,150	Inactive
MILLS, CITY OF	MILLS	4,050	Active
BAR NUNN, TOWN OF	BAR NUNN	4,000	Active
BROOKS WATER & SEWER DISTRICT	MILLS	4,000	Inactive
WHEATLAND, TOWN OF	WHEATLAND	3,659	Active
NEWCASTLE, CITY OF	NEWCASTLE	3,595	Active
KEMMERER-DIAMONDVILLE JPB	KEMMERER	3,348	Active
WRIGHT WATER & SEWER DISTRICT	WRIGHT	3,207	Active
PARADISE VALLEY UTIL CO	CASPER	3,000	Inactive
WHITE MOUNTAIN W&S DISTRICT	ROCK SPRINGS	3,000	Active
EVANSVILLE, TOWN OF	EVANSVILLE	2,873	Active
THERMOPOLIS, TOWN OF	THERMOPOLIS	2,775	Active
YNP-MAMMOTH HOT SPRINGS	YELLOWSTONE	2,600	Active
GLENROCK, TOWN OF	GLENROCK	2,466	Active
SLEEPY HOLLOW SUBDIVISION	GILLETTE	2,400	Active
LOVELL, TOWN OF	LOVELL	2,250	Active
LYMAN, TOWN OF	LYMAN	2,203	Active
GREYBULL, TOWN OF	GREYBULL	2,080	Active
STAR VALLEY RANCH, TOWN OF	STAR VALLEY RANCH	2,030	Active
LITTLE AMERICA HOTELS & RESORTS, INC- WY	LITTLE AMERICA	2,004	Active
AFTON, BOARD OF PUB UTILITIES	AFTON	2,000	Active
LEISURE VALLEY INC/ STAR VALLEY RV PARK	GROVER	1,910	Active
PINEDALE MUNICIPAL WS	PINEDALE	1,900	Active
GTNP-JACKSON LAKE LODGE	MOOSE	1,830	Active
DUBOIS, TOWN OF	DUBOIS	1,822	Active
BRIDGER VALLEY JOINT POWERS BOARD	MOUNTAIN VIEW	1,728	Active
SARATOGA, TOWN OF	SARATOGA	1,720	Active
VISTA WEST WATER COMPANY	CASPER	1,600	Active
LUSK, TOWN OF	LUSK	1,576	Active
PIONEER WATER & SEWER DISTRICT	CASPER	1,500	Active
RAFTER J SUBDIVISION HOA	WILSON	1,500	Active
ASPENS PINES W&S DISTRICT	WILSON	1,400	Active
ALPINE, TOWN OF	ALPINE	1,300	Active
RANCHESTER, TOWN OF	RANCHESTER	1,297	Active
ANTELOPE VALLEY I&S DISTRICT (AVISD)	GILLETTE	1,280	Active
SUNDANCE, CITY OF	SUNDANCE	1,279	Active
BASIN, TOWN OF	BASIN	1,250	Active
MOUNTAIN VIEW, TOWN OF	MOUNTAIN VIEW	1,250	Active
BEAR RIVER REGIONAL JOINT POWERS	BEAR RIVER	1,200	Active
COTTONWOOD ESTATES WTR SUPPLY	LARAMIE	1,200	Inactive
PACIFIC POWER & LIGHT CO.	ROCK SPRINGS	1,200	Inactive
PINE BLUFFS, TOWN OF	FORT COLLINS	1,186	Active
GUERNSEY, TOWN OF	GUERNSEY	1,157	Active
UPTON, TOWN OF	UPTON	1,100	Active
WINCHESTER HILLS	CHEYENNE	1,078	Active
BURNS BOARD OF PUBLIC UTILITIES	BURNS	1,024	Active
MOORCROFT, TOWN OF	MOORCROFT	1,009	Active
CHEVRON CRTR CK BACHELOR HOUS.	EVANSTON	1,000	Inactive
PIONEER MOBILE HOME PARK	ROCK SPRINGS	1,000	Active
WASHAKIE RURAL WATER SYSTEM	WORLAND	990	Active
CLEARVIEW I&S DISTRICT	ROCK SPRINGS	930	Active
TETON VILLAGE WATER & SEWER DISTRICT	TETON VILLAGE	906	Active
MELODY RANCH IMPROVEMENT & SERVICE DIST.	JACKSON	900	Active
SOUTH BIG HORN COUNTY JPB	WORLAND	900	Active
SUNBURST WATER & SEWER DIST.	GILLETTE	900	Inactive
MARBLETON, TOWN OF	MARBLETON	861	Active
FOX PARK SUBDIVISION	GILLETTE	843	Active
HANNA, TOWN OF	HANNA	841	Active
DAYTON, TOWN OF	DAYTON	824	Active
COWLEY, TOWN OF	COWLEY	800	Active
LITTLE MEDICINE DEVELOPMENT CO	SHIRLEY BASIN	800	Inactive
BEDFORD WATER & SEWER DISTRICT	BEDFORD	750	Active
HERITAGE VILLAGE SUBDIVISION	GILLETTE	750	Active
FOOTHILLS MOBILE HOME PARK	GILLETTE	735	Active
GREATER SMOOT W&S DISTRICT	SMOOT	720	Active
DESERT VILLAGE	ROCK SPRINGS	700	Inactive
SKYLINE VILLAGE MOBILE HOME PK	LITTLETON	700	Active
EASTVIEW MANUFACTURED HOME COMMUNITY	GILLETTE	688	Active
VETERANS ADMINISTRATION MEDICAL CENTER	SHERIDAN	685	Active
WEST WINDS	CHEYENNE	663	Active
BIG COUNTRY ESTATES	CHEYENNE	615	Active
SALT CREEK WATER DISTRICT	NEWCASTLE	600	Active
HIGH MEADOW RANCH	PINEDALE	580	Active
BYRON, TOWN OF	BYRON	561	Active
JAMESTOWN-RIO VISTA W&S DISTRICT	GREEN RIVER	560	Active
RAWHIDE VILLAGE #3	GILLETTE	550	Inactive
COKEVILLE, TOWN OF	COKEVILLE	535	Active
FARSON EDEN SCHOOL	ROCK SPRINGS	530	Active
SHOSHONI, TOWN OF	SHOSHONI	515	Active
WEST WINDS MOBILE HOME COMM.	CHEYENNE	503	Inactive
CRESTVIEW ESTATES SUBDIVISION	GILLETTE	500	Active
J AND J MOBILE HOME PARK	GILLETTE	500	Inactive
WAMSUTTER, TOWN OF	WAMSUTTER	500	Active
PINE HAVEN, TOWN OF	GILLETTE	498	Active
SOUTH LARAMIE W&S DISTRICT	LARAMIE	490	Active
SOUTH WORLAND WATER USERS CORPORATION	WORLAND	490	Inactive
LINGLE, TOWN OF	LINGLE	486	Active
SUNNY MEADOWS VILLAGE	LARAMIE	485	Active
B&R MOBILE HOME VILLAGE	ROCK SPRINGS	475	Inactive
LONE TREE VILLAGE MHP	DOUGLAS	475	Active
NORDIC RANCHES WATER, LLC.	ETNA	465	Active
HUDSON, TOWN OF	HUDSON	460	Active
BLACKS FORK WATER & SEWER DIST	LYMAN	450	Inactive
ENCAMPMENT, TOWN OF	ENCAMPMENT	450	Active
FOOTHILLS VILLAGE MOBILE HOME PARK	ROCK SPRINGS	450	Inactive
FORT BRIDGER WATER & SEWER	FT. BRIDGER	450	Inactive
ROLLING HILLS, TOWN OF	ROLLING HILLS	450	Active
SOUTH THERMOPOLIS W&S DISTRICT	THERMOPOLIS	450	Active
SOUTH TORRINGTON WATER DISTRICT	TORRINGTON	450	Active
WESTERN HILLS MHP	LITTLETON	450	Active
LA GRANGE, TOWN OF	LA GRANGE	448	Active
BIG PINEY, TOWN OF	BIG PINEY	445	Active
SINCLAIR, TOWN OF	SINCLAIR	433	Active
NATRONA COUNTY INT'L AIRPORT	CASPER	423	Active
HULETT, TOWN OF	HULETT	420	Active
WESTVIEW MHC	GILLETTE	416	Active
MEANS IMPROVEMENT & SERVICE DISTRICT	GILLETTE	410	Active
ASPENS MHP	EVANSVILLE	400	Inactive
BAGGS, TOWN OF	BAGGS	400	Active
DOWNER NEIGHBORHOOD I&S DISTRICT	SHERIDAN	400	Active
FREEDOM HILLS SUBDIVISION	GILLETTE	400	Active
NICKELSON FARMS WATER COMPANY	GILLETTE	400	Active
ROYAL GROVE SUBDIVISION	GILLETTE	400	Inactive
SOLDIER CREEK WATER COMPANY	SHERIDAN	400	Inactive
SPRING CREEK IMPROVEMENT DISTRICT	JACKSON	400	Active
TEN SLEEP, TOWN OF	TEN SLEEP	400	Active
CV LARAMIE MHP, LLC	CEDAREDGE	375	Active
GREEN ACRES MOBILE HOME PARK	POWELL	375	Active
LEWIS MOBILE HOME PARK	ROCK SPRINGS	370	Active
THAYNE, TOWN OF	THAYNE	366	Active
LINDLEY PARK, LLC	EVANSTON	362	Active
COUNTRYSIDE WATER USERS, INC.	GILLETTE	360	Active
FEDERAL-AMERICAN PARTNERS	RIVERTON	350	Inactive
LUCERNE WATER AND SEWER DIST.	THERMOPOLIS	350	Active
BURLINGTON, TOWN OF	BURLINGTON	348	Active
LA BARGE, TOWN OF	LA BARGE	347	Active
BREAZEALE'S MOBILE HOME PARK	FARMINGTON HILLS	345	Active
ALCOVA ACRES INVESTMENT CORP.	CASPER	340	Inactive
SUPERIOR, TOWN OF	SUPERIOR	336	Active
TERRACE I MHC	FARMINGTON HILLS	336	Active
SNAKE RIVER SPORTING CLUB	WILSON	332	Active
HORIZON MHP	ROCK SPRINGS	330	Active
RIVERSIDE MOBILE HOME COURT	CASPER	330	Active
CIMMARON VILLAGE	CHEYENNE	327	Active
MEETEETSE, TOWN OF	MEETEETSE	327	Active
MIDWEST, TOWN OF	MIDWEST	325	Active
HIDDEN HILLS MHP	FARMINGTON HILLS	324	Active
TERRACE II MHC	FARMINGTON HILLS	320	Active
OSMOND I&S DISTRICT	AFTON	315	Active
PARKWAY MHP & RV CG	CODY	311	Inactive
TEN MILE WATER AND SEWER DISTRICT	ROCK SPRINGS	305	Active
HIGHVIEW MFG MOBILE HOME COMMUNITY (MHC)	GILLETTE	304	Active
ELMO, TOWN OF	HANNA	300	Inactive
FREEDOM W&S DISTRICT	GROVER	300	Active
GARDENS NORTH HOMEOWNERS ASSOCIATION	DUBOIS	300	Active
GREEN ACRES VILLAGE	CODY	300	Inactive
JUBYS MOBILE HOME PARK	CODY	300	Active
NORTH AFTON WATER & SEWER	AFTON	300	Inactive
RIO VISTA HOMESITES WATER SERV	GREEN RIVER	300	Inactive
RIVERSIDE ADDITION WATER CO	LARAMIE	300	Inactive
COOK ROAD WATER DISTRICT	GILLETTE	291	Active
GLENDO, TOWN OF	GLENDO	289	Active
AFFORDABLE RES COMM/CHEYENNE	CHEYENNE	280	Inactive
SAGEBRUSH DEVELOPMENT	GILLETTE	275	Inactive
BAR Y ESTATES/GROS VENTRE WEST WTR DISTS	WILSON	270	Active
WHITE MOUNTAIN MOBILE HOME PARK	ROCK SPRINGS	270	Active
COLLINS HEIGHTS SUBDIVISION	GILLETTE	265	Inactive
GREEN VALLEY MHP	FARMINGTON HILLS	265	Active
KAYCEE, TOWN OF	KAYCEE	263	Active
ORCHARD VALLEY WATER COMPANY	CHEYENNE	260	Active
RIVERSIDE TRAILER COURT	CASPER	260	Inactive
SKYLINE RANCH I&S DISTRICT	WILSON	260	Active
CEDAR HILLS WATER ASSOCIATION	GILLETTE	258	Active
EAST THERMOPOLIS, TOWN OF	EAST THERMOPOLIS	254	Active
GROVER WATER & SEWER DISTRICT	GROVER	252	Active
CARSON MOB HOME PK- VIP REALTY	GILLETTE	251	Inactive
WRANGLER ESTATES	GILLETTE	250	Active
WYOMING STATE HOSPITAL	EVANSTON	250	Inactive
AIR BASE ACRES I&S DISTRICT	CASPER	236	Active
CF&I STEEL CORP, SUNRISE MINE	HARTVILLE	230	Inactive
FAIRVIEW WATER & SEWER DISTRICT	GROVER	230	Active
FORT LARAMIE, TOWN OF	FORT LARAMIE	230	Active
PAVILLION, TOWN OF	PAVILLION	230	Active
WEST END WATER DISTRICT	NEWCASTLE	225	Active
GTNP--MOOSE/BEAVER CREEK	MOOSE	221	Active
AMERICAN ROAD W&S DISTRICT	GILLETTE	220	Active

Showing the 200 largest of 632 systems on record, by population served. Browse by county above for the full list — every system has its own page, and all of them are in the sitemap.

Wyoming Water Systems

Counties in Wyoming

All community water systems in Wyoming