U.S. water systems

EPA Region 8 Water Systems

EPA Region 8

207 community water systems on record — 119 active, 88 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 July 4, 2026. This is a record-keeping and public-information tool — it does not replace EPA Region 8’s official records. Always confirm current status with EPA Region 8 before making decisions based on this information.

All community water systems in EPA Region 8

System name	City	Population served	Status
AGNES LEGGINS	HARLEM	150	Inactive
ALLEN WATER SYSTEM	PINE RIDGE	420	Active
AMERICAN HORSE CREEK	PINE RIDGE	365	Inactive
AMERICAN HORSE SCHOOL	ALLEN	400	Active
ANTELOPE(MISSION) WATER SYSTEM	BOX 147, ROSEBUD	1,500	Inactive
ARAPAHOE COMM WATER SYSTEM	ETHETE	4,100	Active
ARAPAHOE INDUSTRIAL PARK	FORT WASHAKIE	650	Active
ARCADIA WATER SYSTEM	FORT DUCHESNE	0	Inactive
ARLEE	PABLO	124	Active
ASHLAND COMMUNITY WATER SYSTEM	LAME DEER	265	Active
ASSINIBOINE & SIOUX RURAL WATER SYSTEM	POPLAR	1,726	Active
AZURE VS GW	BOX ELDER	171	Inactive
BABB WATER SYSTEM	BROWNING	60	Inactive
BAD NATION WATER SYSTEM	FORT THOMPSON	40	Inactive
BATESLAND HUD HOUSING	PINE RIDGE	50	Inactive
BATESLAND SOUTH	PINE RIDGE	25	Inactive
BEAR CREEK WATER SYSTEM	EAGLE BUTTE	65	Inactive
BEDROCKBABB WATER SYSTEM	BROWNING	645	Active
BELCOURT WATER SYSTEM	BELCOURT	600	Inactive
BELCOURT-TURTLE MTN RURAL WATER SYSTEM	BELCOURT	13,500	Active
BIG ARM WATER SYSTEM	PABLO	116	Active
BIG BEND WATER SYSTEM	FORT THOMPSON	80	Active
BIRNEY VILLAGE	LAME DEER	96	Active
BLACKFEET DORM. WATER SYSTEM	BROWNING	66	Active
BLACKFOOT WATER SYSTEM	BROWNING	56	Active
BLACKFOOT WATER SYSTEM	CHEYENNE RIVER RESERVATION	94	Inactive
BOULDER FLATS	LANDER	210	Inactive
BOX ELDER (LOW RENT HOUSING)	BOX ELDER	166	Inactive
BRIDGER WATER SYSTEM	EAGLE BUTTE	60	Inactive
BROCKTON, TOWN OF	WOLF POINT	375	Active
BULLHEAD SMALL GW	FORT YATES	1,800	Inactive
BULLHEAD WATER SYSTEM	FORT YATES	400	Inactive
BUSBY COMMUNITY WATER SYSTEM	LAME DEER	535	Active
CALICO WATER SYSTEM	PINE RIDGE	0	Inactive
CANNONBALL SMALL SW	FORT YATES	2,700	Inactive
CHERRY CREEK CHEYENNE RIV RES	EAGLE BUTTE	25	Inactive
CHIEF MARTIN CHARLO HOMESITE	PABLO	66	Active
CLARICE PAUL WATER SYSTEM	PABLO	35	Active
CORN CREEK	ROSEBUD	0	Inactive
CORN CREEK WATER SYSTEM	ROSEBUD	40	Inactive
COURCHENE SPRING	ROCKY BOY'S AGENCY, BOX ELDER	44	Inactive
CRAZY HORSE SCHOOL	WANBLEE	428	Active
CROW AGENCY WATER SYSTEM	CROW AGENCY	2,057	Active
CROW CREEK SIOUX TRIBE WATER SYSTEM	FORT THOMPSON	130	Active
CROW CREEK TRIBAL SCHOOL	STEPHAN	516	Active
CROW HILL LOW RENT	FT TOTTEN	51	Inactive
CSKT DIVISION OF FIRE MANAGEMENT	PABLO	60	Active
DAKOTA MAGIC CASINO	HANKINSON	2,360	Active
DAYTON WATER SYSTEM	PABLO	25	Active
DIXON (OLD AGENCY)	PABLO	72	Active
DIXON WATER SYSTEM	ROSEBUD	22	Inactive
DIXON, TOWN OF	PABLO	200	Active
DUNSEITH LOW RENT	EAST DUNSEITH HOUSING	200	Inactive
EAGLE NEST HOMES	PINE RIDGE	195	Active
EAGLEMAN COMMUNITY WATER	BOX ELDER	400	Active
EAST DUNSEITH HOUSING	BELCOURT	200	Inactive
ELMO WATER SYSTEM	PABLO	220	Active
ENEMY SWIM WATER SYSTEM	AGENCY VILLAGE	230	Active
ETHETE WATER SYSTEM	FORT WASHAKIE	1,950	Active
EVARO WATER SYSTEM	PABLO	40	Active
EVERGREEN WATER SYSTEM	PINE RIDGE	450	Inactive
FINLEY HEIGHTS WATER SYSTEM	AGENCY VILLAGE	60	Active
FLANDREAU SCHOOL	FLANDREAU	375	Active
FORT BELKNAP AGENCY WATER SYSTEM	HARLEM	2,600	Active
FORT KIPP SUBDIVISION WATER SYSTEM	WOLF POINT	221	Active
FORT THOMPSON WATER SYSTEM	FORT THOMPSON	1,357	Active
FORT WASHAKIE	FORT WASHAKIE	2,620	Active
FORT YATES WATER SYSTEM	FORT YATES	0	Inactive
FOUR BEARS WATER SYSTEM	NEW TOWN	1,200	Active
FOUR WINDS COMMUNITY SCHOOL	FORT TOTTEN	700	Inactive
FRAZER WATER SYSTEM	WOLF POINT	452	Active
FT TOTTEN WATER SYSTEM	FT TOTTEN	1,500	Inactive
GRASS MOUNTAIN #3	ROSEBUD	50	Inactive
GRAY WOLF VILLAGE	PABLO	32	Active
GREENWOOD VILLAGE	—	0	Inactive
HAYS/WHITE COW CANYON WS	HARLEM	840	Active
HE DOG WATER SYSTEM	ROSEBUD RESERVATION	100	Inactive
HEART BUTTE SCHOOL	HEART BUTTE	250	Active
HEART BUTTE WATER SYSTEM	BROWNING	400	Active
HEINERT`S TRAILER COURT	ROSEBUD	100	Inactive
HOT SPRINGS COURT	SEATTLE	55	Active
HOT SPRINGS TRAILER COURT	—	0	Inactive
HOULE VILLA WATER SYSTEM	PABLO	38	Active
IDEAL WATER SYSTEM	RESERVATION	94	Inactive
IGNACIO-SOUTHERN UTE RURAL WATER SYSTEM	IGNACIO	1,527	Active
IRON LIGHTNING WATER SYSTEM	EAGLE BUTTE	26	Inactive
KANOSH WATER SYSTEM	WEST CEDAR CITY	0	Inactive
KENEL WATER SYSTEM	STANDING ROCK RESERVATION	108	Inactive
KENEL WATER SYSTEM	FORT YATES	196	Inactive
KYLE WATER SYSTEM	PINE RIDGE	6,526	Active
LAKE ANDES TRIBAL HOUSING WATER SYSTEM	WAGNER	264	Active
LAME DEER WATER SYSTEM	LAME DEER	2,605	Active
LAST STARR HOMES (INACTIVE)	BROWNING	225	Inactive
LITTLE EAGLE WATER SYSTEM	FORT YATES	0	Inactive
LITTLE EAGLE WATGER SYSTEM	STANDING ROCK RESERVATION	25	Inactive
LITTLE SHELL	NEW TOWN	1,500	Active
LODGEPOLE (JENNY GREY) SR CTR	HARLEM	35	Inactive
LODGEPOLE ELEMENTARY SCHOOL	HARLEM	0	Inactive
LONEMAN SCHOOL	PINE RIDGE	362	Inactive
LONG HOLLOW WATER SYSTEM	AGENCY VILLAGE	265	Active
LOWER BRULE RURAL WATER SUPPLY SYSTEM	LOWER BRULE	1,637	Active
MANDAREE WATER PLANT	NEW TOWN	1,034	Active
MANDERSON WATER SYSTEM	PINE RIDGE	650	Inactive
MARTIN HUD HOUSING	PINE RIDGE	50	Inactive
MARTY WATER SYSTEM	WAGNER	420	Active
MILK`S CAMP WATER SYSTEM	ROSEBUD	50	Active
MISSION DAM WATER SYSTEM	PABLO	87	Active
MISSION HOUSING WATER SYSTEM	HARLEM	170	Inactive
MISSION WATER SYSTEM	MISSION	1,500	Active
MNI WICONI WTP / CORELINE	FORT PIERRE	25	Active
MNIHNAPA WATER SYSTEM	HARLEM	220	Active
MUDDY CLUSTER WATER SYSTEM	LAME DEER	195	Inactive
NEW EFFINGTON SIOUX WATER SYST	LAKE TRAVERSE RESERVATION	90	Inactive
NEW TOWN, CITY OF	NEW TOWN	2,528	Active
NEW TOWN, CITY OF	—	2,528	Inactive
NORRIS/BLACKPIPE WATER SYSTEM	ROSEBUD	0	Inactive
NORTH ALLEN WATER SYSTEM	PINE RIDGE	65	Active
NORTH MARTIN WATER SYSTEM	PINE RIDGE	78	Active
OGLALA RWS PIPELINE	PINE RIDGE	3,562	Active
OKREEK WATER SYSTEM	ROSEBUD	265	Inactive
OLD AGENCY WATER SYSTEM	AGENCY VILLAGE	1,180	Active
OLD HAYS	HARLEM	80	Active
PACHE WATER SYSTEM	PABLO	276	Active
PARKER SCHOOL WATER SYSTEM	BOX ELDER	42	Inactive
PARMELEE WATER SYSTEM	ROSEBUD	407	Inactive
PARSHALL-LUCKY MOUND	NEW TOWN	720	Active
PARSHALL, CITY OF	PARSHALL	903	Active
PARSHALL, CITY OF	—	1,200	Inactive
PEEVER FLATS WATER SYSTEM	AGENCY VILLAGE	129	Active
PIERRE INDIAN LEARNING CENTER	PIERRE	214	Active
PINE RIDGE HOSPITAL	PINE RIDGE	316	Active
PINE RIDGE WATER SYSTEM	PINE RIDGE	7,482	Active
POPLAR, CITY OF	POPLAR	3,025	Active
PORCUPINE DAY SCHOOL	PINE RIDGE	767	Inactive
PORCUPINE WATER SYSTEM	FORT YATES	87	Inactive
PORCUPINE WATER SYSTEM	STANDING ROCK RESERVATION	87	Inactive
PORCUPINE WATER SYSTEM	FORT YATES	75	Inactive
PORCUPINE WATER SYSTEM	PINE RIDGE RESERVATION	55	Inactive
POTATO CREEK WATER SYSTEM	PINE RIDGE	95	Active
PRETTY EAGLE SCHOOL	SAINT XAVIER	135	Inactive
PRYOR WATER SYSTEM	CROW AGENCY	406	Active
RED CLOUD SCHOOL	PINE RIDGE	501	Active
RED IRON LAKE WATER SYSTEM	AGENCY VILLAGE	95	Active
RED ROCKS WATER SYSTEM	PINE RIDGE	125	Active
RED SHIRT WATER SYSTEM	PINE RIDGE	143	Inactive
ROCKY BOY AGENCY WATER SYSTEM	BOX ELDER	1,442	Active
ROCKY BOY AGENCY WATER SYSTEM	BOX ELDER	0	Inactive
ROCKY BOY'S RURAL WATER	BOX ELDER	2,000	Active
ROLLING HILLS WS	ST. MICHAEL	147	Inactive
ROSEBUD RURAL WATER SYSTEM	ROSEBUD	5,500	Active
ROSEBUD WATER SYSTEM	ROSEBUD	0	Inactive
ROSS ACRES WS	—	25	Inactive
SANGREY WATER (INACTIVE)	BOX ELDER	150	Inactive
SCHLEY WATER SYSTEM	PABLO	85	Active
SELFRIDGE, CITY OF	SELFRIDGE	160	Active
SEVILLE WATER SYSTEM	BROWNING	300	Active
SHARPS CORNER WATER SYSTEM	PINE RIDGE	88	Inactive
SICANGU MNI WICONI RURAL WATER SYSTEM	ROSEBUD	5,610	Active
SICANGU VILLAGE HOMES	ROSEBUD	0	Inactive
SKULL VALLEY WATER SYSTEM	DUGWAY	25	Inactive
SKULL VALLEY WATER SYSTEM	GRANTSVILLE	19	Inactive
SOLEN, CITY OF	SOLEN	83	Active
SPIRIT LAKE WATER MANAGEMENT RWS	ST. MICHAEL	4,400	Active
SPRING CREEK WATER SYSTEM	ROSEBUD	0	Inactive
ST FRANCIS IND SCHOOL	ST FRANCIS (ROSEBUD RES)	90	Inactive
ST FRANCIS WATER AUTHORITY	ROSEBUD	935	Inactive
ST IGNATIUS (MISSION) SO.SIDE	PABLO	356	Active
ST MICHAELS WATER SYSTEM	ST. MICHAELS	240	Inactive
ST. FRANCIS	ROSEBUD	2,450	Active
STANDING ROCK RURAL WATER SYSTEM	FORT YATES	6,839	Active
STANDING ROCK UTILITY ORGANIZ.	FORT YATES	450	Inactive
STARR SCHOOL WATER SYSTEM	BROWNING	250	Active
SUNRISE WATER SYSTEM	PINE RIDGE	380	Active
SWIFT BEAR	ROSEBUD	0	Inactive
SWIFT BIRD WATER SYSTEM	EAGLE BUTTE	150	Inactive
THUNDER BUTTE WATER SYSTEM	EAGLE BUTTE	75	Inactive
TOKIO WATER SYSTEM	ST. MICHAELS	130	Inactive
TOWAOC WATER SYSTEM	TOWAOC	2,020	Active
TOWN OF BROWNING	BROWNING	4,671	Active
TRI-COUNTY RURAL WATER SYSTEM	—	3,125	Inactive
TROUT CREEK WATER SYSTEM	FORT WASHAKIE	0	Inactive
TURTLE LAKE WATER SYSTEM	PABLO	225	Active
TWIN BUTTES WATER PLANT	NEW TOWN	792	Active
TWO MEDICINE WATER - EAST GLACIER	BROWNING	1,504	Active
TWO STRIKE WATER SYSTEM	ROSEBUD	270	Inactive
UPPER CUT MEAT WATER SYSTEM	ROSEBUD	50	Inactive
URIAH HEEPS SPRING WATER SYSTEM	FT. DUCHESNE	3,750	Active
VEBLEN FLATS	AGENCY VILLAGE	60	Active
WAGNER NORTH HOUSING WATER SYSTEM	WAGNER	180	Active
WAGNER SOUTH HOUSING WATER SYSTEM	WAGNER	200	Active
WAKPAMNI WATER SYSTEM	PINE RIDGE	104	Active
WANBLEE EAST	PINE RIDGE	2,179	Active
WANBLEE WATER SYSTEM	PINE RIDGE	773	Active
WARWICK CITY OF	WARWICK	65	Active
WHITE HORSE CREEK WATER SYSTEM	PINE RIDGE	1,690	Active
WHITE MESA WATER SYSTEM	TOWAOC	300	Active
WHITE SHIELD WATER TREATMENT PLANT	NEW TOWN	952	Active
WHITEROCKS WATER SYSTEM	FT. DUCHESNE	812	Active
WINNER HOUSING	ROSEBUD	176	Active
WOLF CREEK SCHOOL	BATESLAND	1,450	Active
WOLF CREEK WATER SYSTEM	PINE RIDGE	65	Active
WOLF POINT CITY OF	WOLF POINT	3,000	Active
WOOD WATER SYSTEM	RESERVATION	61	Inactive
WOODCOCK WATER SYSTEM	PABLO	101	Active
WOUNDED KNEE DISTRICT SCHOOL	MANDERSON	280	Active
WOUNDED KNEE WATER SYSTEM	PINE RIDGE	255	Active
WYOLA WATER SYSTEM	CROW AGENCY	281	Active