Idaho Water Systems

Compiled by PlainEnviro · August 25, 2026

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

Water Systems

773

Health-Based Violation Records

2,331

Health Violations

313 systems

Population Served

1,584,441

Idaho community water systems are regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act; each utility files compliance results with the state's primacy agency and, for federally listed contaminants, with the U.S. Environmental Protection Agency directly. PlainEnviro's health-based SDWIS extract above counts health-based exceedances only -- monitoring and reporting violations are not present in these figures.

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	City	Source	Violations	Pop. Served	Health
1	MISSION CREEK WATER ASSN Bonners Ferry	Bonners Ferry	Groundwater	203	263	Yes
2	ELK CITY WATER AND SEWER ASSN Elk City	Elk City	Surface Water	114	320	Yes
3	JULIAETTA CITY OF Juliaetta	Juliaetta	Surface Water	81	624	Yes
4	DRAKE SUBD Caldwell	Caldwell	Groundwater	62	150	Yes
5	CEDAR SPRINGS COMMUNITY WATER Sagle	Sagle	Groundwater	60	130	Yes
6	BIA NORTH IDAHO Lapwai	Lapwai	Groundwater	49	490	Yes
7	MCCALL CITY OF Mccall	Mccall	Surface Water	36	4,423	Yes
8	ASPEN RIDGE SUBD Island Park	Island Park	Groundwater	35	204	Yes
9	FRUITLAND CITY OF Fruitland	Fruitland	Surface Water	31	7,458	Yes
10	INDIAN VILLAGE Nampa	Nampa	Groundwater	29	225	Yes
11	SHOTGUN CHEROKEE SUBD 5 Island Park	Island Park	Groundwater	28	245	Yes
12	CASTLE MOUNTAIN CREEKS OWNERS ASSN Garden Valley	Garden Valley	Surface Water	27	250	Yes
13	NEW HOPE SUBD Lenore	Lenore	Surface Water	25	100	Yes
14	FILER WATER WORKS Filer	Filer	Groundwater	23	2,858	Yes
15	BELLEVUE CITY OF Bellevue	Bellevue	Groundwater	22	2,747	Yes
16	ASHTON CITY OF Ashton	Ashton	Groundwater	22	1,129	Yes
17	OAKLEY VALLEY WATER CORPORATION Oakley	Oakley	Groundwater	22	500	Yes
18	IDAHO YOUTH RANCH HANDS OF PROMISE Caldwell	Caldwell	Groundwater	21	95	Yes
19	SALMON CITY OF Salmon	Salmon	Surface Water	20	3,158	Yes
20	RIVERBEND ESTATES American Falls	American Falls	Groundwater	20	92	Yes
21	SHOTGUN NORTH Island Park	Island Park	Groundwater	18	285	Yes
22	MOUNTAIN HOME AIR FORCE BASE Mountain Home Afb	Mountain Home Afb	Groundwater	16	7,500	Yes
23	IDAHO CITY WATER DEPT Idaho City	Idaho City	Surface Water	14	531	Yes
24	EATON MOBILE HOME COURT Lewiston	Lewiston	Groundwater	14	94	Yes
25	TERRACE LAKES WATER COMPANY New Plymouth	New Plymouth	Groundwater	13	475	Yes
26	BANIDA WATER AND SEWER DIST Preston	Preston	Groundwater	13	180	Yes
27	LITTLE BLACKTAIL RANCH WATER DISTRICT Athol	Athol	Surface Water	13	95	Yes
28	BEE LINE WATER ASSN INC Bonners Ferry	Bonners Ferry	Surface Water	12	533	Yes
29	TWENTY MILE CREEK WATER ASSN Bonners Ferry	Bonners Ferry	Surface Water	12	225	Yes
30	GREENHILLS ESTATES 3 Meridian	Meridian	Groundwater	12	200	Yes
31	MEANDER POINT SUBD Twin Falls	Twin Falls	Groundwater	12	140	Yes
32	PRESTON CITY OF Preston	Preston	Groundwater	9	5,591	Yes
33	COUNTRY LIFE ESTATES Idaho Falls	Idaho Falls	Groundwater	9	250	Yes
34	WOODLAND SHORES WATER AND SEWER ASSN Coeur D Alene	Coeur D Alene	Surface Water	9	210	Yes
35	OHIO MATCH ESTATES Rathdrum	Rathdrum	Groundwater	9	118	Yes
36	CAPITOL WATER CORP Boise	Boise	Groundwater	8	9,000	Yes
37	KOOTENAI COUNTY WATER DIST 1 Coeur D'alene	Coeur D'alene	Surface Water	8	843	Yes
38	WILDERNESS RANCH OWNERS ASSOCIATION INC Boise	Boise	Surface Water	8	525	Yes
39	BLACKFOOT CITY OF Blackfoot	Blackfoot	Groundwater	7	13,224	Yes
40	FRANKLIN CITY OF Franklin	Franklin	Surface Water	7	1,000	Yes
41	FAIRFIELD CITY OF Fairfield	Fairfield	Groundwater	7	441	Yes
42	PARADISE ESTATES WATER CORP Boise	Boise	Surface Water	7	273	Yes
43	CUB RIVER ACRES Preston	Preston	Groundwater	7	180	Yes
44	FERDINAND CITY OF Ferdinand	Ferdinand	Groundwater	7	133	Yes
45	SMILEY CREEK WATER USERS ASSN INC Ketchum	Ketchum	Groundwater	7	117	Yes
46	M & T WATER CORP Nampa	Nampa	Groundwater	7	100	Yes
47	FALLS WATER COMPANY INC Idaho Falls	Idaho Falls	Groundwater	6	22,650	Yes
48	BURLEY WATER DEPT Burley	Burley	Groundwater	6	10,345	Yes
49	WORLEY CITY OF Worley	Worley	Groundwater	6	591	Yes
50	ALBION CITY OF Albion	Albion	Groundwater	6	325	Yes
51	MOUNTAIN VIEW WATER AND ROAD ASSN Garden Valley	Garden Valley	Groundwater	6	305	Yes
52	ROSE LAKE WATER ASSN Cataldo	Cataldo	Groundwater	6	300	Yes
53	LAKEYS CAFE AND TRAILER PARK Boise	Boise	Groundwater	6	300	Yes
54	BRUNEAU WATER AND SEWER DIST Bruneau	Bruneau	Groundwater	6	220	Yes
55	ELK RIVER CITY OF Elk River	Elk River	Surface Water	6	165	Yes
56	EAGLE POINT COMMUNITY Eagle	Eagle	Groundwater	6	150	Yes
57	PELICAN POINT SUBDIVISION Rupert	Rupert	Groundwater	6	142	Yes
58	ROLLING HILLS ACRES Ucon	Ucon	Groundwater	6	141	Yes
59	GEM STATE ACADEMY Caldwell	Caldwell	Groundwater	6	121	Yes
60	BIRCH CREEK CULINARY Preston	Preston	Groundwater	6	120	Yes
61	MOUNTAIN HOME, CITY OF Mountain Home	Mountain Home	Groundwater	5	14,651	Yes
62	TROY CITY OF Troy	Troy	Surface Water	5	850	Yes
63	BLISS CITY OF Bliss	Bliss	Groundwater	5	384	Yes
64	EVERGREEN MOBILE PARK Nampa	Nampa	Groundwater	5	284	Yes
65	SANDPOINT PUBLIC WORKS DEPT Sandpoint	Sandpoint	Surface Water	4	12,284	Yes
66	FORT HALL Fort Hall	Fort Hall	Groundwater	4	2,850	Yes
67	MEADOWS AT WEST MOUNTAIN Meridian	Meridian	Groundwater	4	550	Yes
68	PIERCE CITY OF Pierce	Pierce	Surface Water	4	467	Yes
69	GRAND VIEW, CITY OF Grand View	Grand View	Groundwater	4	452	Yes
70	CLIFTON CITY OF Clifton	Clifton	Groundwater	4	413	Yes
71	UNIT 3 WATER ASSN Jerome	Jerome	Groundwater	4	350	Yes
72	PEPPERWOOD CROSSING/ROCKY MNT UTILITIES Rigby	Rigby	Groundwater	4	336	Yes
73	PARKER CITY OF Parker	Parker	Groundwater	4	322	Yes
74	FIR GROVE ESTATES Donnelly	Donnelly	Groundwater	4	270	Yes
75	HOPE WATER SYSTEM Sandpoint	Sandpoint	Surface Water	4	180	Yes
76	SAWTOOTH ESTATES WATER USERS Mountain Home	Mountain Home	Groundwater	4	175	Yes
77	PANORAMA HILLS WATER COMPANY Iona	Iona	Groundwater	4	175	Yes
78	APEX LIVING COMMUNITY Moscow	Moscow	Groundwater	4	150	Yes
79	BLACKHAWK ON THE RIVER Boise	Boise	Groundwater	4	150	Yes
80	MINIDOKA CITY OF Minidoka	Minidoka	Groundwater	4	120	Yes
81	VIEW WATER DEVELOPMENT COMPANY Burley	Burley	Groundwater	4	112	Yes
82	LAKEVIEW WATER COMPANY 1 Notus	Notus	Groundwater	4	100	Yes
83	TROW CREEK WATER ASSN Bonners Ferry	Bonners Ferry	Surface Water	4	98	Yes
84	POCATELLO CITY OF Pocatello	Pocatello	Groundwater	3	58,231	Yes
85	REXBURG CITY OF Rexburg	Rexburg	Groundwater	3	40,695	Yes
86	KIMBERLY CITY OF Kimberly	Kimberly	Groundwater	3	5,359	Yes
87	RICHMOND CITY WATER SYSTEM Preston	Preston	Groundwater	3	2,967	Yes
88	DALTON WATER ASSN INC Dalton Gardens	Dalton Gardens	Groundwater	3	2,602	Yes
89	OAKLEY CITY OF Oakley	Oakley	Groundwater	3	821	Yes
90	TAYLOR MOUNTAIN WATER AND SEWER DISTRICT Idaho Falls	Idaho Falls	Groundwater	3	600	Yes
91	GEORGETOWN CITY OF Georgetown	Georgetown	Groundwater	3	476	Yes
92	IDOC MOUNTAIN VIEW TRANSFORMATION CENTER Boise	Boise	Groundwater	3	456	Yes
93	ARIMO CITY OF Arimo	Arimo	Groundwater	3	368	Yes
94	BLACKHAWK ESTATES/IRON RIM Idaho Falls	Idaho Falls	Groundwater	3	270	Yes
95	SOUTHVIEW TERRACE PARK Athol	Athol	Groundwater	3	250	Yes
96	CANYON CREEK MOBILE HOME PARK Boise	Boise	Groundwater	3	243	Yes
97	OWYHEE VILLAGE SUBD WATER ASSN INC Caldwell	Caldwell	Groundwater	3	200	Yes
98	CLARK THEURER WATER ASSN Nampa	Nampa	Groundwater	3	155	Yes
99	SUNBROOK ESTATES DIV # 2 Rigby	Rigby	Groundwater	3	144	Yes
100	EMIDA WATER AND SEWER ASSOCIATION St Maries	St Maries	Groundwater	3	120	Yes
101	KRIZVIEW PARK Boise	Boise	Groundwater	3	120	Yes
102	GOLDEN EAGLE RANCH Ketchum	Ketchum	Groundwater	3	120	Yes
103	PRESTON EASTSIDE WATER CO Preston	Preston	Groundwater	3	120	Yes
104	POST FALLS CITY OF Post Falls	Post Falls	Groundwater	2	20,285	Yes
105	RIGBY CITY OF Rigby	Rigby	Groundwater	2	5,400	Yes
106	E SHOSHONE COUNTY WATER DIST WALLACE Wallace	Wallace	Surface Water	2	2,388	Yes
107	RIVERSIDE WATER AND SEWER DISTRICT Orofino	Orofino	Surface Water	2	2,000	Yes
108	HANSEN CITY OF Hansen	Hansen	Groundwater	2	1,200	Yes
109	ARCO CITY OF Arco	Arco	Groundwater	2	1,080	Yes
110	PLUMMER CITY OF Plummer	Plummer	Groundwater	2	1,034	Yes
111	CASCADE CITY OF Cascade	Cascade	Groundwater	2	1,000	Yes
112	COTTONWOOD WATER DEPT Cottonwood	Cottonwood	Groundwater	2	977	Yes
113	GRACE CITY OF Grace	Grace	Groundwater	2	920	Yes
114	DOVER CITY OF Dover	Dover	Surface Water	2	865	Yes
115	POTLATCH CITY OF Potlatch	Potlatch	Groundwater	2	812	Yes
116	FERNWOOD WATER DIST Fernwood	Fernwood	Surface Water	2	514	Yes
117	DUBOIS CITY OF Dubois	Dubois	Groundwater	2	511	Yes
118	RED PHEASANT WATER COMPANY LLC Lewiston	Lewiston	Groundwater	2	480	Yes
119	NEZPERCE WATER DEPT Nezperce	Nezperce	Groundwater	2	460	Yes
120	J AND K WATER CORP Idaho Falls	Idaho Falls	Groundwater	2	370	Yes
121	LANSING MEADOWS Middleton	Middleton	Groundwater	2	320	Yes
122	CONKLING PARK WATER ASSN Worley	Worley	Groundwater	2	309	Yes
123	NORTH TOMER BUTTE W&S DISTRICT Moscow	Moscow	Groundwater	2	259	Yes
124	BOVILL WATER DEPT Bovill	Bovill	Groundwater	2	256	Yes
125	DAY STAR Donnelly	Donnelly	Groundwater	2	250	Yes
126	BENNINGTON WATER SYSTEM Bennington	Bennington	Groundwater	2	250	Yes
127	UPPER TWIN LAKES WATER COMPANY INC Rathdrum	Rathdrum	Groundwater	2	227	Yes
128	KANAKA RAPIDS RANCH WATER SYSTEM INC Buhl	Buhl	Groundwater	2	220	Yes
129	KARCHER RANCHETTE WATER CORP Caldwell	Caldwell	Groundwater	2	213	Yes
130	SOMERSET WEST WATER CORP Caldwell	Caldwell	Groundwater	2	203	Yes
131	HEATHERLANDS SUBD Ketchum	Ketchum	Groundwater	2	200	Yes
132	SNAKE RIVER VIEW ESTATES Blackfoot	Blackfoot	Groundwater	2	175	Yes
133	GOLF CLUB ESTATES WATER INC Priest Lake	Priest Lake	Groundwater	2	140	Yes
134	RIVERS POINT PROPERTY OWNERS ASSN Boise	Boise	Surface Water	2	140	Yes
135	CHERRY CREEK Sun Valley	Sun Valley	Groundwater	2	138	Yes
136	COUNTRY CLUB ESTATES Jerome	Jerome	Groundwater	2	137	Yes
137	LINDA VISTA MOBILE HOME PARK Boise	Boise	Groundwater	2	125	Yes
138	RAPID RIVER WATER & SEWER DIST Riggins	Riggins	Groundwater	2	120	Yes
139	COUNTRY CLUB SUBDIVISIONS WATER ASSN Caldwell	Caldwell	Groundwater	2	120	Yes
140	DIAMOND BENCHVIEW WATER CORP Sandpoint	Sandpoint	Groundwater	2	115	Yes
141	AVERY WATER AND SEWER DIST Avery	Avery	Groundwater	2	114	Yes
142	HIGHWAY 54 WATER ASSOCIATION, INC Post Falls	Post Falls	Groundwater	2	100	Yes
143	LAKE FOREST HOMES ASSN INC Rathdrum	Rathdrum	Groundwater	2	98	Yes
144	KANIKSU SHORES ESTATES Sandpoint	Sandpoint	Groundwater	2	93	Yes
145	MERIDIAN WATER DEPT Meridian	Meridian	Groundwater	1	147,340	Yes
146	CENTRAL SHOSHONE COUNTY WATER DIST Kellogg	Kellogg	Surface Water	1	6,098	Yes
147	HYDE PARK CITY WATER SYSTEM Franklin	Franklin	Groundwater	1	5,200	Yes
148	ST MARIES CITY OF St Maries	St Maries	Surface Water	1	4,173	Yes
149	OROFINO CITY OF Orofino	Orofino	Surface Water	1	2,459	Yes
150	WILDER CITY OF Wilder	Wilder	Groundwater	1	1,690	Yes
151	GENESEE CITY OF Genesee	Genesee	Groundwater	1	1,044	Yes
152	E SHOSHONE COUNTY WATER DIST MULLAN Wallace	Wallace	Surface Water	1	840	Yes
153	CATALDO WATER DIST Kingston	Kingston	Groundwater	1	680	Yes
154	LACLEDE WATER DIST Sandpoint	Sandpoint	Surface Water	1	668	Yes
155	RUSTIC ACRES MOBILE HOME PARK Boise	Boise	Groundwater	1	540	Yes
156	PLUMMER TRIBAL COMMUNITY Plummer	Plummer	Groundwater	1	515	Yes
157	CAVE BAY COMMUNITY SYSTEM Worley	Worley	Groundwater	1	458	Yes
158	HARRISON CITY OF Plummer	Plummer	Groundwater	1	456	Yes
159	DIETRICH WATER SYSTEM Dietrich	Dietrich	Groundwater	1	450	Yes
160	WHITNEY NASHVILLE WATER WORKS Preston	Preston	Groundwater	1	403	Yes
161	PINE RIDGE WATER AND SEWER DIST Kamiah	Kamiah	Surface Water	1	390	Yes
162	DESMET Plummer	Plummer	Groundwater	1	355	Yes
163	BANCROFT CITY OF Bancroft	Bancroft	Groundwater	1	350	Yes
164	NEWDALE CITY OF Newdale	Newdale	Groundwater	1	340	Yes
165	BIG SKY N. SUBDIVISION Pocatello	Pocatello	Groundwater	1	300	Yes
166	DECLO CITY OF Declo	Declo	Groundwater	1	300	Yes
167	BEAR LAKE WEST POA Fish Haven	Fish Haven	Groundwater	1	300	Yes
168	ELKHORN RANCH Rathdrum	Rathdrum	Groundwater	1	278	Yes
169	STITES CITY OF Stites	Stites	Groundwater	1	253	Yes
170	PARADISE VALLEY WATER ASSN Bonners Ferry	Bonners Ferry	Surface Water	1	250	Yes
171	TRINITY ESTATES WATER USERS ASSN Mountain Home	Mountain Home	Groundwater	1	250	Yes
172	DONNELLY CITY OF Donnelly	Donnelly	Groundwater	1	237	Yes
173	KAMIAH Lapwai	Lapwai	Groundwater	1	200	Yes
174	ONAWAY WATER AND SEWER ASSN Potlatch	Potlatch	Groundwater	1	200	Yes
175	RIVERVIEW VILLA American Falls	American Falls	Groundwater	1	200	Yes
176	LEISURE ACRES TRAILER COURT Rathdrum	Rathdrum	Groundwater	1	180	Yes
177	SOURDOUGH POINT Sandpoint	Sandpoint	Surface Water	1	178	Yes
178	ROLLING MEADOWS MHP Garden City	Garden City	Groundwater	1	156	Yes
179	HOYT BLUFF WATER ASSOCIATION Rathdrum	Rathdrum	Groundwater	1	151	Yes
180	TENSED CITY OF Tensed	Tensed	Groundwater	1	146	Yes
181	EAGLE MHC Boise	Boise	Groundwater	1	135	Yes
182	MURTAUGH CITY OF Murtaugh	Murtaugh	Groundwater	1	130	Yes
183	NORTH LAPWAI Lapwai	Lapwai	Groundwater	1	110	Yes
184	WHITEWATER SUBD Pocatello	Pocatello	Groundwater	1	106	Yes
185	SKY RANCH ESTATES Nampa	Nampa	Groundwater	1	104	Yes
186	SUNNY ACRES Kellogg	Kellogg	Groundwater	1	100	Yes
187	KARCHER ACRES SUBD Nampa	Nampa	Groundwater	1	100	Yes
188	PLEASANT VIEW MANOR Caldwell	Caldwell	Groundwater	1	100	Yes
189	SIMPLOT LIVESTOCK COMPANY GRANDVIEW Grand View	Grand View	Groundwater	1	100	Yes
190	ELK MEADOWS Rigby	Rigby	Groundwater	1	100	Yes
191	FOUR SEASONS WATER COMPANY Blackfoot	Blackfoot	Groundwater	1	96	Yes
192	EAST LIZARD BUTTE WATER CORP Caldwell	Caldwell	Groundwater	1	95	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) HOMEDALE CITY OF (3,300) GRANGEVILLE WATER DEPT (3,151) SODA SPRINGS CITY OF (3,111) WENDELL CITY OF (3,000) HEYBURN CITY OF (3,000) 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 (773)

Page 2 of 16, ordered by population served.

System	Population Served	Violations
HILLSIDE SERVICE AREA	4,140	0
GOODING CITY OF	3,706	0
EAGLE, CITY OF (EASTERN ZONE)	3,702	0
ST ANTHONY	3,606	0
KETCHUM CITY OF	3,555	0
RIMROCK SERVICE AREA	3,493	0
SUN VALLEY WATER AND SEWER DIST	3,400	0
BONNERS FERRY CITY OF	3,367	0
IDOC SBX COMPLEX	3,309	0
HOMEDALE CITY OF	3,300	0
SALMON CITY OF	3,158	20
GRANGEVILLE WATER DEPT	3,151	0
SODA SPRINGS CITY OF	3,111	0
WENDELL CITY OF	3,000	0
HEYBURN CITY OF	3,000	0
RICHMOND CITY WATER SYSTEM	2,967	3
FILER WATER WORKS	2,858	23
FORT HALL	2,850	4
SPIRIT LAKE CITY OF	2,825	0
MONTPELIER CITY OF	2,772	0
BELLEVUE CITY OF	2,747	22
IONA WATER DEPT	2,717	0
DALTON WATER ASSN INC	2,602	3
OROFINO CITY OF	2,459	1
THREE MILE WATER DIST	2,458	0
SUGAR CITY CITY OF	2,395	0
E SHOSHONE COUNTY WATER DIST WALLACE	2,388	2
VICTOR CITY OF	2,361	0
CABINET MOUNTAINS WATER DIST	2,335	0
PARMA CITY OF	2,250	0
IDOC IDAHO STATE CORRECTIONAL CENTER	2,204	0
MALAD CITY OF	2,200	0
DRIGGS CITY OF	2,200	0
PRIEST RIVER CITY OF	2,173	0
ABERDEEN CITY OF	2,088	0
WILLARD CITY WATER SYSTEM	2,036	0
TWIN LAKES SERVICE AREA	2,023	0
RIVERSIDE WATER AND SEWER DISTRICT	2,000	2
PINEHURST WATER DIST	1,950	0
WILDER CITY OF	1,690	1
SHOSHONE WATER WORKS	1,653	0
NEW PLYMOUTH CITY OF	1,600	0
HAUSER LAKE WATER ASSN INC	1,575	0
ODEN WATER ASSN INC	1,524	0
COMORE LOMA	1,500	0
KAMIAH CITY OF	1,495	0
BAYVIEW WATER AND SEWER DIST	1,320	0
MARSING CITY OF	1,300	0
FAIRVIEW WATER DIST	1,300	0
GLENNS FERRY CITY OF	1,282	0

← Previous Page 2 of 16 Next →

Frequently Asked Questions

How many water systems are in Idaho?

Idaho has 773 community water systems tracked by the EPA, serving a combined population of 1,584,441 people.

How many water systems in Idaho have health violations?

313 water systems in Idaho have health-based violations, which include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. These represent 40% of all systems in the state.

How many health-based violation records are in this extract for Idaho?

PlainEnviro's health-based EPA SDWIS extract contains 2,331 records joined to 773 active community water systems in Idaho. Monitoring and reporting records are not included.

Explore More

Idaho Water Quality → Idaho Environmental Overview → All States →

Other States

AL AK AS AZ AR CA CO CT DE DC FL GA GU HI IL IN IA KS KY LA ME MD MA MI MN MS MO MT NE NV NH NJ NM NY NC ND MP OH OK OR PA PR RI SC SD TN TX VI UT VT VA WA WV WI WY

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

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

Browse all → | Rankings →