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Idaho Water Systems

767 community water systems in Idaho, ranked by violation count. Data from EPA Safe Drinking Water Information System (SDWIS).

Water Systems
767
Total Violations
2,204
Health Violations
311 systems
Population Served
1,580,079

Idaho operates 767 community water systems regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. Together these utilities serve an estimated 1,580,079 residents, each filing compliance results with the state's primacy agency and, for federally listed contaminants, with the U.S. Environmental Protection Agency.

Across the state, SDWIS records contain 2,204 total violations, of which 311 systems carry at least one active health-based violation, a Maximum Contaminant Level (MCL) exceedance or treatment-technique failure. That represents roughly 41% of Idaho systems.

Violation counts reflect both infrastructure realities and reporting diligence, a state with more small rural systems will accumulate more monitoring-type violations without necessarily delivering worse water. Health-based violations are the stronger safety signal. A past violation does not itself indicate current unsafe water; utilities must notify customers, remediate, and publish an annual Consumer Confidence Report. All numbers below draw directly from the federal SDWIS record.

Which water systems have violations? (192)

# System Name Violations Health
1 MISSION CREEK WATER ASSN Bonners Ferry 195 Yes
2 ELK CITY WATER AND SEWER ASSN Elk City 114 Yes
3 JULIAETTA CITY OF Juliaetta 81 Yes
4 DRAKE SUBD Caldwell 62 Yes
5 CEDAR SPRINGS COMMUNITY WATER Sagle 54 Yes
6 BIA NORTH IDAHO Lapwai 49 Yes
7 ASPEN RIDGE SUBD Rexburg 34 Yes
8 MCCALL CITY OF Mccall 33 Yes
9 FRUITLAND CITY OF Fruitland 30 Yes
10 CASTLE MOUNTAIN CREEKS OWNERS ASSN Garden Valley 26 Yes
11 INDIAN VILLAGE Nampa 26 Yes
12 NEW HOPE SUBD Lenore 24 Yes
13 FILER WATER WORKS Filer 23 Yes
14 SHOTGUN CHEROKEE SUBD 5 Rexburg 23 Yes
15 BELLEVUE CITY OF Bellevue 22 Yes
16 ASHTON CITY OF Ashton 22 Yes
17 OAKLEY VALLEY WATER CORPORATION Oakley 22 Yes
18 IDAHO YOUTH RANCH HANDS OF PROMISE Caldwell 21 Yes
19 RIVERBEND ESTATES American Falls 20 Yes
20 SHOTGUN NORTH Rexburg 18 Yes
21 MOUNTAIN HOME AIR FORCE BASE Mountain Home Afb 16 Yes
22 SALMON CITY OF Salmon 16 Yes
23 IDAHO CITY WATER DEPT Idaho City 14 Yes
24 EATON MOBILE HOME COURT Lewiston 14 Yes
25 BANIDA WINDER WATER AND SEWER DIST Preston 13 Yes
26 LITTLE BLACKTAIL RANCH WATER DISTRICT Athol 13 Yes
27 BEE LINE WATER ASSN INC Bonners Ferry 12 Yes
28 TWENTY MILE CREEK WATER ASSN Bonners Ferry 12 Yes
29 GREENHILLS ESTATES 3 Meridian 12 Yes
30 MEANDER POINT SUBD Twin Falls 12 Yes
31 PRESTON CITY OF Preston 9 Yes
32 TERRACE LAKES WATER COMPANY New Plymouth 9 Yes
33 COUNTRY LIFE ESTATES Idaho Falls 9 Yes
34 WOODLAND SHORES WATER AND SEWER ASSN Coeur D Alene 9 Yes
35 WILDERNESS RANCH OWNERS ASSOCIATION INC Boise 8 Yes
36 OHIO MATCH ESTATES Rathdrum 8 Yes
37 CAPITOL WATER CORP Boise 7 Yes
38 FRANKLIN CITY OF Franklin 7 Yes
39 FAIRFIELD CITY OF Fairfield 7 Yes
40 PARADISE ESTATES WATER CORP Boise 7 Yes
41 FERDINAND CITY OF Ferdinand 7 Yes
42 SMILEY CREEK WATER USERS ASSN INC Ketchum 7 Yes
43 M & T WATER CORP Nampa 7 Yes
44 FALLS WATER COMPANY INC Idaho Falls 6 Yes
45 BURLEY WATER DEPT Burley 6 Yes
46 KOOTENAI COUNTY WATER DIST 1 Coeur D'alene 6 Yes
47 WORLEY CITY OF Worley 6 Yes
48 ALBION CITY OF Albion 6 Yes
49 MOUNTAIN VIEW WATER AND ROAD ASSN Garden Valley 6 Yes
50 ROSE LAKE WATER ASSN Cataldo 6 Yes
51 LAKEYS CAFE AND TRAILER PARK Boise 6 Yes
52 BRUNEAU WATER AND SEWER DIST Bruneau 6 Yes
53 CUB RIVER ACRES Preston 6 Yes
54 ELK RIVER CITY OF Elk River 6 Yes
55 PELICAN POINT SUBDIVISION Rupert 6 Yes
56 ROLLING HILLS ACRES Ucon 6 Yes
57 GEM STATE ACADEMY Caldwell 6 Yes
58 BIRCH CREEK CULINARY Preston 6 Yes
59 MOUNTAIN HOME, CITY OF Mountain Home 5 Yes
60 BLACKFOOT CITY OF Blackfoot 5 Yes
61 TROY CITY OF Troy 5 Yes
62 BLISS CITY OF Bliss 5 Yes
63 EVERGREEN MOBILE PARK Nampa 5 Yes
64 SANDPOINT PUBLIC WORKS DEPT Sandpoint 4 Yes
65 FORT HALL Fort Hall 4 Yes
66 MEADOWS AT WEST MOUNTAIN Meridian 4 Yes
67 PIERCE CITY OF Pierce 4 Yes
68 CLIFTON CITY OF Clifton 4 Yes
69 PEPPERWOOD CROSSING/ROCKY MNT UTILITIES Rigby 4 Yes
70 PARKER CITY OF Parker 4 Yes
71 FIR GROVE ESTATES Donnelly 4 Yes
72 HOPE WATER SYSTEM Sandpoint 4 Yes
73 SAWTOOTH ESTATES WATER USERS Mountain Home 4 Yes
74 PANORAMA HILLS WATER COMPANY Iona 4 Yes
75 APEX LIVING COMMUNITY Moscow 4 Yes
76 BLACKHAWK ON THE RIVER Boise 4 Yes
77 MINIDOKA CITY OF Minidoka 4 Yes
78 LAKEVIEW WATER COMPANY 1 Notus 4 Yes
79 TROW CREEK WATER ASSN Bonners Ferry 4 Yes
80 MAVERICK SUBD LASHER CONSTRUCTION Caldwell 4 Yes
81 POCATELLO CITY OF Pocatello 3 Yes
82 KIMBERLY CITY OF Kimberly 3 Yes
83 RICHMOND CITY WATER SYSTEM Preston 3 Yes
84 DALTON WATER ASSN INC Dalton Gardens 3 Yes
85 TAYLOR MOUNTAIN WATER AND SEWER DISTRICT Idaho Falls 3 Yes
86 GEORGETOWN CITY OF Georgetown 3 Yes
87 IDOC MOUNTAIN VIEW TRANSFORMATION CENTER Boise 3 Yes
88 ARIMO CITY OF Arimo 3 Yes
89 UNIT 3 WATER ASSN Jerome 3 Yes
90 BLACKHAWK ESTATES/IRON RIM Idaho Falls 3 Yes
91 SOUTHVIEW TERRACE PARK Athol 3 Yes
92 CANYON CREEK MOBILE HOME PARK Boise 3 Yes
93 OWYHEE VILLAGE SUBD WATER ASSN INC Caldwell 3 Yes
94 CLARK THEURER WATER ASSN Nampa 3 Yes
95 SUNBROOK ESTATES DIV # 2 Rigby 3 Yes
96 KRIZVIEW PARK Boise 3 Yes
97 PRESTON EASTSIDE WATER CO Preston 3 Yes
98 VIEW WATER DEVELOPMENT COMPANY Burley 3 Yes
99 REXBURG CITY OF Rexburg 2 Yes
100 POST FALLS CITY OF Post Falls 2 Yes
101 E SHOSHONE COUNTY WATER DIST WALLACE Wallace 2 Yes
102 HANSEN CITY OF Hansen 2 Yes
103 ARCO CITY OF Arco 2 Yes
104 PLUMMER CITY OF Plummer 2 Yes
105 CASCADE CITY OF Cascade 2 Yes
106 GRACE CITY OF Grace 2 Yes
107 OAKLEY CITY OF Oakley 2 Yes
108 DUBOIS CITY OF Dubois 2 Yes
109 J AND K WATER CORP Idaho Falls 2 Yes
110 GRAND VIEW, CITY OF Grand View 2 Yes
111 LANSING MEADOWS Middleton 2 Yes
112 BOVILL WATER DEPT Bovill 2 Yes
113 DAY STAR Donnelly 2 Yes
114 UPPER TWIN LAKES WATER COMPANY INC Rathdrum 2 Yes
115 KANAKA RAPIDS RANCH WATER SYSTEM INC Buhl 2 Yes
116 KARCHER RANCHETTE WATER CORP Caldwell 2 Yes
117 SOMERSET WEST WATER CORP Caldwell 2 Yes
118 GOLF CLUB ESTATES WATER INC Priest Lake 2 Yes
119 RIVERS POINT PROPERTY OWNERS ASSN Boise 2 Yes
120 CHERRY CREEK Sun Valley 2 Yes
121 COUNTRY CLUB ESTATES Jerome 2 Yes
122 LINDA VISTA MOBILE HOME PARK Boise 2 Yes
123 RAPID RIVER WATER & SEWER DIST Riggins 2 Yes
124 COUNTRY CLUB SUBDIVISIONS WATER ASSN Caldwell 2 Yes
125 AVERY WATER AND SEWER DIST Avery 2 Yes
126 HIGHWAY 54 WATER ASSOCIATION, INC Post Falls 2 Yes
127 LAKE FOREST HOMES ASSN INC Rathdrum 2 Yes
128 EMIDA WATER AND SEWER ASSOCIATION St Maries 2 Yes
129 RIVERSIDE ESTATES Blackfoot 2 Yes
130 MERIDIAN WATER DEPT Meridian 1 Yes
131 CENTRAL SHOSHONE COUNTY WATER DIST Kellogg 1 Yes
132 RIGBY CITY OF Rigby 1 Yes
133 HYDE PARK CITY WATER SYSTEM Franklin 1 Yes
134 ST MARIES CITY OF St Maries 1 Yes
135 OROFINO CITY OF Orofino 1 Yes
136 IDOC IDAHO STATE CORRECTIONAL CENTER Boise 1 Yes
137 RIVERSIDE WATER AND SEWER DISTRICT Orofino 1 Yes
138 WILDER CITY OF Wilder 1 Yes
139 GENESEE CITY OF Genesee 1 Yes
140 COTTONWOOD WATER DEPT Cottonwood 1 Yes
141 DOVER CITY OF Dover 1 Yes
142 E SHOSHONE COUNTY WATER DIST MULLAN Wallace 1 Yes
143 POTLATCH CITY OF Potlatch 1 Yes
144 CATALDO WATER DIST Kingston 1 Yes
145 LACLEDE WATER DIST Sandpoint 1 Yes
146 RUSTIC ACRES MOBILE HOME PARK Boise 1 Yes
147 PLUMMER TRIBAL COMMUNITY Plummer 1 Yes
148 FERNWOOD WATER DIST Fernwood 1 Yes
149 RED PHEASANT WATER COMPANY LLC Lewiston 1 Yes
150 NEZPERCE WATER DEPT Nezperce 1 Yes
151 CAVE BAY COMMUNITY SYSTEM Worley 1 Yes
152 WHITNEY NASHVILLE WATER WORKS Preston 1 Yes
153 PINE RIDGE WATER AND SEWER DIST Kamiah 1 Yes
154 DESMET Plummer 1 Yes
155 BANCROFT CITY OF Bancroft 1 Yes
156 NEWDALE CITY OF Newdale 1 Yes
157 DIETRICH WATER SYSTEM Dietrich 1 Yes
158 CONKLING PARK WATER ASSN Worley 1 Yes
159 BIG SKY N. SUBDIVISION Pocatello 1 Yes
160 DECLO CITY OF Declo 1 Yes
161 BEAR LAKE WEST POA Fish Haven 1 Yes
162 ELKHORN RANCH Rathdrum 1 Yes
163 NORTH TOMER BUTTE W&S DISTRICT Moscow 1 Yes
164 STITES CITY OF Stites 1 Yes
165 PARADISE VALLEY WATER ASSN Bonners Ferry 1 Yes
166 TRINITY ESTATES WATER USERS ASSN Mountain Home 1 Yes
167 BENNINGTON WATER SYSTEM Bennington 1 Yes
168 DONNELLY CITY OF Donnelly 1 Yes
169 KAMIAH Lapwai 1 Yes
170 ONAWAY WATER AND SEWER ASSN Potlatch 1 Yes
171 RIVERVIEW VILLA American Falls 1 Yes
172 LEISURE ACRES TRAILER COURT Rathdrum 1 Yes
173 SOURDOUGH POINT Sandpoint 1 Yes
174 SNAKE RIVER VIEW ESTATES Blackfoot 1 Yes
175 ROLLING MEADOWS MHP Garden City 1 Yes
176 HOYT BLUFF WATER ASSOCIATION Rathdrum 1 Yes
177 TENSED CITY OF Tensed 1 Yes
178 EAGLE MHC Boise 1 Yes
179 HEATHERLANDS SUBD Ketchum 1 Yes
180 MURTAUGH CITY OF Murtaugh 1 Yes
181 DIAMOND BENCHVIEW WATER CORP Sandpoint 1 Yes
182 NORTH LAPWAI Lapwai 1 Yes
183 WHITEWATER SUBD Pocatello 1 Yes
184 SKY RANCH ESTATES Nampa 1 Yes
185 SUNNY ACRES Kellogg 1 Yes
186 KARCHER ACRES SUBD Nampa 1 Yes
187 SIMPLOT LIVESTOCK COMPANY GRANDVIEW Grand View 1 Yes
188 HEYBURN ESTATES Heyburn 1 Yes
189 ELK MEADOWS Rigby 1 Yes
190 FOUR SEASONS WATER COMPANY Blackfoot 1 Yes
191 EAST LIZARD BUTTE WATER CORP Marsing 1 Yes
192 PARKVIEW WATER ASSN Hayden 1 Yes

Systems with No Violations (308)

308 water systems in Idaho have zero recorded violations. Showing the 50 largest by population served.

VEOLIA WATER IDAHO (264,978) NAMPA CITY OF (100,200) CALDWELL CITY OF (74,000) IDAHO FALLS CITY OF (69,450) TWIN FALLS CITY OF (56,121) COEUR D ALENE CITY OF (54,115) KUNA CITY OF (32,038) MOSCOW WATER DEPT (26,000) LEWISTON ORCHARDS IRRIGATION DIST (20,000) AMMON CITY OF (17,338) CHUBBUCK CITY OF (15,842) LEWISTON CITY OF (15,001) STAR SEWER AND WATER DIST WATER SYSTEM (14,000) MIDDLETON CITY OF (13,190) JEROME CITY OF (13,135) GARDEN CITY WATER AND SEWER SYSTEM (12,500) EAST GREENACRES IRRIGATION DIST (11,165) RATHDRUM CITY OF (10,358) HAYDEN LAKE IRRIGATION DIST (9,375) ROSS POINT WATER DIST (8,965) AVONDALE IRRIGATION DIST (8,785) UNIVERSITY OF IDAHO (8,589) PAYETTE CITY OF (8,127) HAILEY WATER AND SEWER (8,000) EMMETT CITY OF (6,700) EAGLE, CITY OF (WESTERN ZONE) (6,108) RUPERT CITY OF (5,796) WEISER CITY OF (5,630) AMERICAN FALLS CITY OF (4,863) BUHL CITY OF (4,518) SHELLEY CITY OF (4,409) HILLSIDE SERVICE AREA (4,140) GOODING CITY OF (3,706) EAGLE, CITY OF (EASTERN ZONE) (3,702) ST ANTHONY (3,606) KETCHUM CITY OF (3,555) RIMROCK SERVICE AREA (3,493) SUN VALLEY WATER AND SEWER DIST (3,400) BONNERS FERRY CITY OF (3,367) IDOC SBX COMPLEX (3,309) GRANGEVILLE WATER DEPT (3,151) SODA SPRINGS CITY OF (3,111) WENDELL CITY OF (3,000) HEYBURN CITY OF (3,000) HOMEDALE CITY OF (2,999) SPIRIT LAKE CITY OF (2,825) MONTPELIER CITY OF (2,772) IONA WATER DEPT (2,717) THREE MILE WATER DIST (2,458) SUGAR CITY CITY OF (2,395) +258 more

All Water Systems in Idaho (767)

Page 7 of 16, ordered by population served.

System Population Served Violations
PAUL HOUSING AUTHORITY 250 0
BENNINGTON WATER SYSTEM 250 1
BAILEY CREEK PROPERTY OWNERS ASSN 250 0
COUNTRY LIFE ESTATES 250 9
FOX CREEK COUNTRY CLUB ESTATES 250 0
HELENA RV AND MOBILE HOME PARK 250 0
OHIO MATCH ROAD WATER DIST 245 0
WOODVIEW ACRES PROPERTY OWNERS 245 0
SHOTGUN CHEROKEE SUBD 5 245 23
CANYON CREEK MOBILE HOME PARK 243 3
ROCKLAND CITY OF 242 0
SUNNYRIDGE 3 WATER CORP 240 0
GREENFIELD WATER AND SEWER 240 0
DONNELLY CITY OF 237 1
HAYDEN HAVEN / GEM SHORES 236 0
SOUTH LAPWAI 235 0
SUNLIGHT TERRACE 234 0
SAINT DOMINIC SCHOOL 228 0
UPPER TWIN LAKES WATER COMPANY INC 227 2
TWENTY MILE CREEK WATER ASSN 225 12
INDIAN VILLAGE 225 26
WOODVILLE 225 0
CARLIN BAY PROPERTY OWNERS ASSOCIATION 220 0
BRUNEAU WATER AND SEWER DIST 220 6
HOLLISTER CITY OF 220 0
KANAKA RAPIDS RANCH WATER SYSTEM INC 220 2
KARCHER RANCHETTE WATER CORP 213 2
WOODLAND SHORES WATER AND SEWER ASSN 210 9
PECK WATER SYSTEM 210 0
BLOOMINGTON CITY OF 206 0
ASPEN RIDGE SUBD 204 34
SYRINGA WATER AND SEWER 203 0
SOMERSET WEST WATER CORP 203 2
KAMIAH 200 1
SKIN CREEK WATER ASSN 200 0
COUGAR BAY WATER ASSOCIATION 200 0
MONASTERY OF ST GERTRUDES 200 0
ONAWAY WATER AND SEWER ASSN 200 1
OWYHEE VILLAGE SUBD WATER ASSN INC 200 3
GREENHILLS ESTATES 3 200 12
KLUGHERZ WATER CORP 200 0
JUGHANDLE ESTATES 200 0
LACEYS VISTA ACRES WATER CORP 200 0
RIVERVIEW VILLA 200 1
ELK BEND UNIT 1 200 0
MOORE WATER AND SEWER ASSN 196 0
EAGLE MEADOWS MHP 195 0
JEFFERSON GREENS ESTATES 193 0
SUMMERWIND WATER USERS 192 0
ST CHARLES CITY OF 191 0
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Frequently Asked Questions

How many water systems are in Idaho?
Idaho has 767 community water systems tracked by the EPA, serving a combined population of 1,580,079 people.
How many water systems in Idaho have health violations?
311 water systems in Idaho have health-based violations, which include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. These represent 41% of all systems in the state.
What is the total number of water violations in Idaho?
Idaho water systems have accumulated 2,204 total violations across all 767 community water systems.

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About This Data

Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Only community water systems (CWS) are included.

Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services

Read our methodology - how this data is sourced, computed, and verified.

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