U.S. water systems

Idaho Water Systems

Idaho

1,241 community water systems on record — 765 active, 476 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 Idaho’s official records. Always confirm current status with Idaho before making decisions based on this information.

All community water systems in Idaho

System name	Mailing city	Population served	Status
VEOLIA WATER IDAHO	BOISE	264,978	Active
MERIDIAN WATER DEPT	MERIDIAN	147,340	Active
NAMPA CITY OF	NAMPA	100,200	Active
CALDWELL CITY OF	CALDWELL	74,000	Active
IDAHO FALLS CITY OF	IDAHO FALLS	69,450	Active
POCATELLO CITY OF	POCATELLO	58,231	Active
TWIN FALLS CITY OF	TWIN FALLS	56,121	Active
COEUR D ALENE CITY OF	COEUR D ALENE	54,115	Active
REXBURG CITY OF	REXBURG	40,695	Active
KUNA CITY OF	KUNA	32,038	Active
MOSCOW WATER DEPT	MOSCOW	26,000	Active
FALLS WATER COMPANY INC	IDAHO FALLS	22,650	Active
POST FALLS CITY OF	POST FALLS	20,285	Active
LEWISTON ORCHARDS IRRIGATION DIST	LEWISTON	20,000	Active
AMMON CITY OF	AMMON	17,338	Active
CHUBBUCK CITY OF	CHUBBUCK	15,842	Active
LEWISTON CITY OF	LEWISTON	15,001	Active
MOUNTAIN HOME, CITY OF	MOUNTAIN HOME	14,651	Active
STAR SEWER AND WATER DIST WATER SYSTEM	STAR	14,000	Active
BLACKFOOT CITY OF	BLACKFOOT	13,224	Active
MIDDLETON CITY OF	MIDDLETON	13,190	Active
JEROME CITY OF	JEROME	13,135	Active
GARDEN CITY WATER AND SEWER SYSTEM	GARDEN CITY	12,500	Active
SANDPOINT PUBLIC WORKS DEPT	SANDPOINT	12,284	Active
EAST GREENACRES IRRIGATION DIST	POST FALLS	11,165	Active
VEOLIA EAGLE	BOISE	10,539	Inactive
RATHDRUM CITY OF	RATHDRUM	10,358	Active
BURLEY WATER DEPT	BURLEY	10,345	Active
SOUTH COUNTY WATER COMPANY	BOISE	9,700	Inactive
HAYDEN LAKE IRRIGATION DIST	HAYDEN	9,375	Active
CAPITOL WATER CORP	BOISE	9,000	Active
ROSS POINT WATER DIST	POST FALLS	8,965	Active
AVONDALE IRRIGATION DIST	HAYDEN	8,785	Active
UNIVERSITY OF IDAHO	MOSCOW	8,589	Active
PAYETTE CITY OF	PAYETTE	8,127	Active
HAILEY WATER AND SEWER	HAILEY	8,000	Active
MOUNTAIN HOME AIR FORCE BASE	MOUNTAIN HOME AFB	7,500	Active
FRUITLAND CITY OF	FRUITLAND	7,458	Active
EMMETT CITY OF	EMMETT	6,700	Active
EAGLE, CITY OF (WESTERN ZONE)	EAGLE	6,108	Active
CENTRAL SHOSHONE COUNTY WATER DIST	KELLOGG	6,098	Active
RUPERT CITY OF	RUPERT	5,796	Active
WEISER CITY OF	WEISER	5,630	Active
PRESTON CITY OF	PRESTON	5,591	Active
RIGBY CITY OF	RIGBY	5,400	Active
KIMBERLY CITY OF	KIMBERLY	5,359	Active
AMERICAN FALLS CITY OF	AMERICAN FALLS	4,863	Active
BUHL CITY OF	BUHL	4,518	Active
MCCALL CITY OF	MCCALL	4,423	Active
SHELLEY CITY OF	SHELLEY	4,409	Active
ST MARIES CITY OF	ST MARIES	4,173	Active
HILLSIDE SERVICE AREA	RATHDRUM	4,140	Active
GOODING CITY OF	GOODING	3,706	Active
EAGLE, CITY OF (EASTERN ZONE)	EAGLE	3,702	Active
ST ANTHONY	ST ANTHONY	3,606	Active
KETCHUM CITY OF	KETCHUM	3,555	Active
RIMROCK SERVICE AREA	RATHDRUM	3,493	Active
SUN VALLEY WATER AND SEWER DIST	SUN VALLEY	3,400	Active
BONNERS FERRY CITY OF	BONNERS FERRY	3,367	Active
IDOC SBX COMPLEX	BOISE	3,309	Active
HOMEDALE CITY OF	HOMEDALE	3,300	Active
SALMON CITY OF	SALMON	3,158	Active
GRANGEVILLE WATER DEPT	GRANGEVILLE	3,151	Active
SODA SPRINGS CITY OF	SODA SPRINGS	3,111	Active
CENTRAL SHOSHONE WATER DIST KELLOGG	KELLOGG	3,000	Inactive
HEYBURN CITY OF	HEYBURN	3,000	Active
WENDELL CITY OF	WENDELL	3,000	Active
FILER WATER WORKS	FILER	2,858	Active
SPIRIT LAKE CITY OF	SPIRIT LAKE	2,825	Active
MONTPELIER CITY OF	MONTPELIER	2,772	Active
BELLEVUE CITY OF	BELLEVUE	2,747	Active
IONA WATER DEPT	IONA	2,717	Active
DALTON WATER ASSN INC	DALTON GARDENS	2,602	Active
OROFINO CITY OF	OROFINO	2,459	Active
THREE MILE WATER DIST	BONNERS FERRY	2,458	Active
SUGAR CITY CITY OF	SUGAR CITY	2,395	Active
E SHOSHONE COUNTY WATER DIST WALLACE	WALLACE	2,388	Active
VICTOR CITY OF	VICTOR	2,361	Active
CABINET MOUNTAINS WATER DIST	BONNERS FERRY	2,335	Active
PARMA CITY OF	PARMA	2,250	Active
IDOC IDAHO STATE CORRECTIONAL CENTER	BOISE	2,204	Active
DRIGGS CITY OF	DRIGGS	2,200	Active
MALAD CITY OF	MALAD	2,200	Active
PRIEST RIVER CITY OF	PRIEST RIVER	2,173	Active
ABERDEEN CITY OF	ABERDEEN	2,088	Active
TWIN LAKES SERVICE AREA	RATHDRUM	2,023	Active
CENTRAL SHOSHONE WATER DIST OSBURN	KELLOGG	2,000	Inactive
RIVERSIDE WATER AND SEWER DISTRICT	OROFINO	2,000	Active
PINEHURST WATER DIST	PINEHURST	1,950	Active
WILDER CITY OF	WILDER	1,690	Active
SHOSHONE WATER WORKS	SHOSHONE	1,653	Active
NEW PLYMOUTH CITY OF	NEW PLYMOUTH	1,600	Active
HAUSER LAKE WATER ASSN INC	HAUSER	1,575	Active
ODEN WATER ASSN INC	SANDPOINT	1,524	Active
CENTRAL PARK APARTMENTS	BOISE	1,500	Inactive
COMORE LOMA	IDAHO FALLS	1,500	Active
CULLIGAN WATER CONDITIONING	IDAHO FALLS	1,500	Inactive
KAMIAH CITY OF	KAMIAH	1,495	Active
BAYVIEW WATER AND SEWER DIST	BAYVIEW	1,320	Active
FAIRVIEW WATER DIST	PRESTON	1,300	Active
MARSING CITY OF	MARSING	1,300	Active
GLENNS FERRY CITY OF	GLENNS FERRY	1,282	Active
HANSEN CITY OF	HANSEN	1,200	Active
PURITY WATER COMPANY AND IDAHO WATERS	KIMBERLY	1,200	Inactive
PAUL CITY OF	PAUL	1,195	Active
HAYDEN PINES GROUSE MEADOWS	RATHDRUM	1,188	Active
UCON CITY OF	UCON	1,161	Active
ASHTON CITY OF	ASHTON	1,129	Active
DRY CREEK WATER COMPANY LLC	EAGLE	1,125	Active
MOYIE SPRINGS CITY OF	MOYIE SPRINGS	1,123	Active
REMINGTON REC WATER DIST	ATHOL	1,104	Active
CALDWELL HOUSING AUTHORITY	CALDWELL	1,100	Active
KETCHUM SPRING WATER COMPANY	KETCHUM	1,100	Inactive
ARCO CITY OF	ARCO	1,080	Active
GENESEE CITY OF	GENESEE	1,044	Active
PLUMMER CITY OF	PLUMMER	1,034	Active
BLACK ROCK UTILITIES INC	HAYDEN	1,014	Active
CASCADE CITY OF	CASCADE	1,000	Active
EAGLE WATER COMPANY EAGLE POINTE	EAGLE	1,000	Inactive
FRANKLIN CITY OF	FRANKLIN	1,000	Active
PINECREST HILLS WATER SYSTEM	COEUR D'ALENE	1,000	Inactive
CAREY WATER AND SEWER	CAREY	993	Active
ATHOL CITY OF	ATHOL	990	Active
HAGERMAN CITY OF	HAGERMAN	988	Active
GREENFERRY WATER & SEWER DISTRICT	HAYDEN	978	Active
COTTONWOOD WATER DEPT	COTTONWOOD	977	Active
SCHWEITZER BASIN WATER COMPANY	SAGLE	955	Active
STONERIDGE UTILITIES	BLANCHARD	940	Active
TETON SPRINGS WATER AND SEWER COMPANY	DRIGGS	924	Active
GRACE CITY OF	GRACE	920	Active
CHALLIS CITY OF	CHALLIS	900	Active
COUNCIL CITY OF	COUNCIL	900	Active
HAZELTON CITY OF	HAZELTON	899	Active
UWI MESA WATER COMPANY	BOISE	875	Inactive
DOVER CITY OF	DOVER	865	Active
TROY CITY OF	TROY	850	Active
GREENLEAF CITY OF	GREENLEAF	846	Active
GEM STATE - SPIRIT LAKE EAST	COEUR D'ALENE	843	Active
KOOTENAI COUNTY WATER DIST 1	COEUR D'ALENE	843	Active
E SHOSHONE COUNTY WATER DIST MULLAN	WALLACE	840	Active
OAKLEY CITY OF	OAKLEY	821	Active
POTLATCH CITY OF	POTLATCH	812	Active
HILLSDALE ESTATES HOMEOWNERS ASSN	BOISE	800	Active
MCCAMMON CITY OF	MCCAMMON	800	Active
MEADOW CREEK PROPERTY OWNERS ASSN INC	NEW MEADOWS	800	Active
INKOM CITY OF	INKOM	792	Active
MERIDIAN HEIGHTS WATER & SEWER DISTRICT	MERIDIAN	790	Inactive
HORSESHOE BEND WATER SUPPLY	HORSESHOE BEND	750	Active
BLUE VALLEY MOBILE HOME PARK	MERIDIAN	740	Inactive
TETON CITY OF	TETON	735	Active
CLARK FORK CITY OF	CLARK FORK	730	Active
SAGLE VALLEY WATER DIST	COEUR D'ALENE	708	Active
BARBER WATER CORP	BOISE	700	Inactive
MALCOLM WILDING	IDAHO FALLS	700	Inactive
3D WATER ASSOCIATION	UCONN	680	Active
CATALDO WATER DIST	KINGSTON	680	Active
ROBERTS CITY OF	ROBERTS	680	Active
LACLEDE WATER DIST	SANDPOINT	668	Active
RIRIE CITY OF	RIRIE	656	Active
DESERT VIEW ESTATES WATER CORP	KUNA	650	Active
MELBA CITY OF	MELBA	648	Active
GEM STATE - BAR CIRCLE S RANCH	COEUR D'ALENE	633	Active
DOWNEY CITY OF	DOWNEY	625	Active
JULIAETTA CITY OF	JULIAETTA	624	Active
SOUTHSIDE WATER AND SEWER DIST	SANDPOINT	615	Active
KOOSKIA WATER DEPT	KOOSKIA	607	Active
CHALLIS MUNICIPAL	CHALLIS	600	Inactive
ECHO BEACH WATER SYSTEM	HAYDEN	600	Inactive
FORT HALL WATER AND SEWER DIST	POCATELLO	600	Inactive
KOOTENAI-PONDERAY W&S DISTRICT	SANDPOINT	600	Inactive
TAYLOR MOUNTAIN WATER AND SEWER DISTRICT	IDAHO FALLS	600	Active
WORLEY CITY OF	WORLEY	591	Active
KINGSTON WATER DIST 1	KINGSTON	585	Active
NEW MEADOWS CITY OF	NEW MEADOWS	582	Active
MACKAY CITY OF	MACKAY	566	Active
CHILCO SERVICE AREA	RATHDRUM	563	Active
MEADOWS AT WEST MOUNTAIN	MERIDIAN	550	Active
SYRINGA HEIGHTS WATER DIST	SANDPOINT	550	Active
WILLIAM W MATHER /HOLLERAN	CLAYTON	550	Inactive
WEST BONNER WATER DIST 1	OLD TOWN	545	Active
RUSTIC ACRES MOBILE HOME PARK	BOISE	540	Active
NOTUS CITY OF	NOTUS	539	Active
PARIS CITY OF	PARIS	535	Active
BEE LINE WATER ASSN INC	BONNERS FERRY	533	Active
IDAHO CITY WATER DEPT	IDAHO CITY	531	Active
DEARY CITY OF	DEARY	529	Active
WILDERNESS RANCH OWNERS ASSOCIATION INC	BOISE	525	Active
FERNWOOD WATER DIST	FERNWOOD	514	Active
DUBOIS CITY OF	DUBOIS	511	Active
FIRTH CITY OF	FIRTH	511	Active
DAYTON CITY OF	DAYTON	510	Active
CRAIGMONT CITY OF	CRAIGMONT	501	Active
RICHFIELD CITY OF	RICHFIELD	501	Active
CLARENDON SUBD	KETCHUM	500	Inactive
OAKLEY VALLEY WATER CORPORATION	OAKLEY	500	Active
PINE VILLA PARK AND WATER ASSN	POST FALLS	500	Active
EMERALD ESTATES WATER ASSN INC	COEUR D ALENE	495	Active
CITY OF EAGLE - AVIMOR	EAGLE	490	Active
CITY OF EAGLE - VALNOVA	EAGLE	490	Active
WESTON CITY OF	WESTON	490	Active

Showing the 200 largest of 1,241 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.

Idaho Water Systems

Counties in Idaho

All community water systems in Idaho