Arizona Water Systems

Compiled by PlainEnviro Editorial, Environmental Data Editorial Team · July 13, 2026

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

Water Systems

956

Total Violations

4,821

Health Violations

435 systems

Population Served

7,422,128

Arizona operates 956 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 7,422,128 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 4,821 total violations, of which 435 systems carry at least one active health-based violation, a Maximum Contaminant Level (MCL) exceedance or treatment-technique failure. That represents roughly 46% of Arizona 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? (202)

#	System Name	City	Source	Violations	Pop. Served	Health
1	Polacca Polacca	Polacca	Groundwater	172	4,108	Yes
2	Shungopavi Second Mesa	Second Mesa	Groundwater	149	1,756	Yes
3	COTTONWOOD MUNICIPAL WATER CW1 Cottonwood	Cottonwood	Groundwater	144	11,023	Yes
4	PAPAGO BUTTE DWID Maricopa	Maricopa	Groundwater	141	530	Yes
5	WELLTON TOWN OF Wellton	Wellton	Surface Water	136	3,000	Yes
6	Mishongnovi (Upper Sipaulovi/Upper Mishongnovi) Second Mesa	Second Mesa	Groundwater	124	490	Yes
7	Dilkon-Indian Wells-Greasewood-White Cone NTUA Fort Defiance	Fort Defiance	Groundwater	105	4,986	Yes
8	Toadlena NTUA Ft Defiance	Ft Defiance	Groundwater	81	903	Yes
9	Aneth NTUA Ft Defiance	Ft Defiance	Groundwater	71	1,481	Yes
10	SCUA Upper Seven Mile San Carlos	San Carlos	Groundwater	62	8,478	Yes
11	COTTONWOOD MUNICIPAL WATER VV3 Cottonwood	Cottonwood	Groundwater	60	1,458	Yes
12	THUNDERBIRD FARMS DWID Maricopa	Maricopa	Groundwater	58	2,231	Yes
13	OAK CREEK WATER DISTRICT Sedona	Sedona	Groundwater	53	1,507	Yes
14	MARICOPA MOUNTAIN DWID 1 Maricopa	Maricopa	Groundwater	52	450	Yes
15	SIERRA PACIFIC MOBILE MANOR Yuma	Yuma	Groundwater	47	816	Yes
16	CITY OF YUMA Yuma	Yuma	Surface Water	46	103,264	Yes
17	Fort McDowell Community Fountain Hills	Fountain Hills	Groundwater	45	7,260	Yes
18	EPCOR - LAKESIDE El Mirage	El Mirage	Surface Water	45	1,775	Yes
19	EPCOR - MOOVALYA KEYS El Mirage	El Mirage	Surface Water	43	1,298	Yes
20	EPCOR - MARINA VILLAGE El Mirage	El Mirage	Surface Water	39	528	Yes
21	Sweetwater NTUA Ft Defiance	Ft Defiance	Surface Water	37	2,014	Yes
22	EPCOR - PARKER DAM El Mirage	El Mirage	Surface Water	37	429	Yes
23	SCUA Bylas San Carlos	San Carlos	Groundwater	32	3,160	Yes
24	DESERT GARDENS RV RESORT CO-OP, INC Florence	Florence	Groundwater	31	532	Yes
25	Cameron NTUA Fort Defiance	Fort Defiance	Groundwater	28	742	Yes
26	Fort Defiance-Window Rock-St Michaels NTUA Ft Defiance	Ft Defiance	Groundwater	27	12,869	Yes
27	BIG PARK WATER COMPANY Sedona	Sedona	Groundwater	27	7,392	Yes
28	FOOTHILLS UTILITIES KINGMAN EAST Yuma	Yuma	Groundwater	26	2,538	Yes
29	SHEPARD WATER COMPANY Yuma	Yuma	Groundwater	24	430	Yes
30	Hopi High School - BIA Keams Canyon	Keams Canyon	Groundwater	22	1,150	Yes
31	MORENCI WATER ELEC CO MAIN Phoenix	Phoenix	Surface Water	21	4,108	Yes
32	Dishchii Bikoh Community School - BIA Charter White River	White River	Groundwater	21	622	Yes
33	WILLIAMS CITY OF Williams	Williams	Groundwater	20	3,145	Yes
34	Red Mesa NTUA Ft Defiance	Ft Defiance	Surface Water	20	1,023	Yes
35	COTTONWOOD MUNICIPAL WATER VV6 Cottonwood	Cottonwood	Groundwater	18	4,509	Yes
36	COPPER MOUNTAIN RANCH CFD Casa Grande	Casa Grande	Groundwater	18	1,071	Yes
37	Colorado River Regional Water System Parker	Parker	Groundwater	17	8,490	Yes
38	EPCOR - HOLIDAY HARBOR El Mirage	El Mirage	Surface Water	17	559	Yes
39	Lower Moencopi - Spring Source Tuba City	Tuba City	Groundwater	17	465	Yes
40	CAMERON TRADING POST Cameron	Cameron	Groundwater	15	1,270	Yes
41	COLDWATER CANYON 1 Tucson	Tucson	Groundwater	15	541	Yes
42	POMERENE DWID Pomerene	Pomerene	Groundwater	14	1,030	Yes
43	VALLE ESCONDIDO Maricopa	Maricopa	Groundwater	14	405	Yes
44	SPRINGERVILLE TOWN OF Springerville	Springerville	Groundwater	13	1,972	Yes
45	TOMBSTONE CITY OF Tombstone	Tombstone	Surface Water	13	1,545	Yes
46	Cocopah Bend RV & Golf Resort Somerton	Somerton	Groundwater	13	1,095	Yes
47	COUNTRY LANE TRAILER PARK Show Low	Show Low	Groundwater	13	450	Yes
48	GRAND CANYON NATIONAL PARK Grand Canyon	Grand Canyon	Groundwater	12	16,590	Yes
49	Kaibab Village Pipe Spring	Pipe Spring	Groundwater	12	407	Yes
50	Quechan Utility Yuma	Yuma	Groundwater	10	5,660	Yes
51	Grand Canyon West Peach Springs	Peach Springs	Groundwater	10	3,120	Yes
52	MARICOPA CONSOLIDATED DWID Maricopa	Maricopa	Groundwater	10	928	Yes
53	ELFRIDA WID Elfrida	Elfrida	Groundwater	10	800	Yes
54	USAF LUKE AIR FORCE BASE Luke Afb	Luke Afb	Surface Water	9	8,440	Yes
55	SOUTHLAND UTILITIES - GOLDEN ACRES Tucson	Tucson	Groundwater	9	1,614	Yes
56	SCUA Lower Peridot San Carlos	San Carlos	Groundwater	9	702	Yes
57	TONTO BASIN WATER - CACTUS FOREST Payson	Payson	Groundwater	9	613	Yes
58	SUN VALLEY FARMS UNIT VI San Tan Valley	San Tan Valley	Groundwater	9	600	Yes
59	CITY OF BUCKEYE - VALENCIA TOWN DIVISION Buckeye	Buckeye	Groundwater	8	30,377	Yes
60	GRIC DPW Wild Horse Pass Sacaton	Sacaton	Groundwater	8	22,795	Yes
61	PUEBLO DEL SOL WATER COMPANY Sierra Vista	Sierra Vista	Groundwater	8	12,804	Yes
62	CAVE CREEK WATER Cave Creek	Cave Creek	Surface Water	8	5,895	Yes
63	CENTENNIAL PARK DWID Colorado City	Colorado City	Groundwater	8	1,267	Yes
64	GW -BWC, INC- SUNSHINE Maricopa	Maricopa	Groundwater	8	604	Yes
65	COUNTRY CLUB ACRES WATER INC Wickenburg	Wickenburg	Groundwater	8	431	Yes
66	GRAHAM COUNTY UTILITIES - PIMA Pima	Pima	Groundwater	7	3,799	Yes
67	FEDERAL CORRECTION INSTITUTION Phoenix	Phoenix	Groundwater	7	1,500	Yes
68	DUNCAN TOWN OF Duncan	Duncan	Groundwater	7	605	Yes
69	FISHERS LANDING RESORT Yuma	Yuma	Surface Water	7	402	Yes
70	ADOC EYMAN UNIT Phoenix	Phoenix	Groundwater	6	3,969	Yes
71	KEARNY TOWN OF Kearny	Kearny	Groundwater	6	1,950	Yes
72	PONDEROSA UTILITY CORP Flagstaff	Flagstaff	Groundwater	6	1,585	Yes
73	TONTO BASIN WATER - LR GARDENS WEST Payson	Payson	Groundwater	6	1,172	Yes
74	HEBER DWID Heber	Heber	Groundwater	6	839	Yes
75	LAKEWOOD ESTATES WATER COMPANY Tucson	Tucson	Groundwater	6	722	Yes
76	PARK WATER COMPANY INC Tucson	Tucson	Groundwater	6	416	Yes
77	NOGALES CITY OF Nogales	Nogales	Groundwater	5	22,000	Yes
78	APACHE JUNCTION WATER DISTRICT Apache Junction	Apache Junction	Surface Water	5	15,610	Yes
79	WMATUA Cibecue Whiteriver	Whiteriver	Groundwater	5	2,590	Yes
80	BIA Keams Canyon Keams Canyon	Keams Canyon	Groundwater	5	925	Yes
81	RANCHO DEL CONEJO COMM WATER COOP Tucson	Tucson	Groundwater	5	900	Yes
82	Dilcon Community Boarding School BIA Winslow	Winslow	Groundwater	5	473	Yes
83	LAKE HAVASU CITY OF Lake Havasu City	Lake Havasu City	Groundwater	4	54,610	Yes
84	PIMA UTILITIES Phoenix	Phoenix	Groundwater	4	20,000	Yes
85	WMATUA Miner Flat Whiteriver	Whiteriver	Surface Water	4	15,570	Yes
86	Farmington Rural-Shiprock-Beclabito NTUA Ft Defiance	Ft Defiance	Surface Water	4	15,233	Yes
87	USMC YUMA MAIN SYSTEM Yuma	Yuma	Surface Water	4	6,324	Yes
88	GOLDEN SHORES WATER COMPANY Williams	Williams	Groundwater	4	3,970	Yes
89	COTTONWOOD MUNICIPAL WATER VV2 Cottonwood	Cottonwood	Groundwater	4	2,893	Yes
90	COTTONWOOD MUNICIPAL WATER VSF1 Cottonwood	Cottonwood	Groundwater	4	2,194	Yes
91	MESCAL LAKES WATER SYSTEM Glendale	Glendale	Groundwater	4	1,390	Yes
92	ADAMAN MUTUAL WATER COMPANY Litchfield Park	Litchfield Park	Groundwater	4	700	Yes
93	ARIZONA TRAINING PROGRAM Phoenix	Phoenix	Groundwater	4	470	Yes
94	GILBERT, TOWN OF Gilbert	Gilbert	Surface Water	3	247,600	Yes
95	EPCOR - AGUA FRIA El Mirage	El Mirage	Surface Water	3	127,718	Yes
96	SAN LUIS CITY OF San Luis	San Luis	Groundwater	3	39,705	Yes
97	BULLHEAD CITY MOHAVE Bullhead City	Bullhead City	Groundwater	3	36,330	Yes
98	FOOTHILLS WATER AND SEWER LLC Yuma	Yuma	Surface Water	3	32,425	Yes
99	Ak-Chin Village Maricopa	Maricopa	Surface Water	3	11,646	Yes
100	PAGE CITY OF Page	Page	Surface Water	3	7,420	Yes
101	ASPC LEWIS COMPLEX WATER SYSTEM Buckeye	Buckeye	Groundwater	3	4,300	Yes
102	CORDES LAKES WATER COMPANY Litchfield Park	Litchfield Park	Groundwater	3	4,257	Yes
103	Ganado-Burnside-Cornfield-Steamboat NTUA Ft Defiance	Ft Defiance	Groundwater	3	3,947	Yes
104	Big River Development Parker	Parker	Groundwater	3	3,550	Yes
105	VOYAGER AT WHITE MOUNTAIN LAKES WC Pinetop	Pinetop	Groundwater	3	1,997	Yes
106	CLEAR SPRINGS UTILITY MAIN Glendale	Glendale	Groundwater	3	1,385	Yes
107	Kykotsmovi Kykotsmovi	Kykotsmovi	Groundwater	3	1,302	Yes
108	ADOC FLORENCE ASP Phoenix	Phoenix	Groundwater	3	1,001	Yes
109	AWC - CASA GRANDE WEST WATER COMPANY Phoenix	Phoenix	Groundwater	3	943	Yes
110	SANDARIO WATER COMPANY Glendale	Glendale	Groundwater	3	870	Yes
111	BROOKE WATER LLC - CIRCLE CITY WC Tucson	Tucson	Groundwater	3	815	Yes
112	GREENEHAVEN WATER COMPANY Tucson	Tucson	Groundwater	3	807	Yes
113	SILVERVIEW RV PARK Bullhead City	Bullhead City	Groundwater	3	800	Yes
114	MARANA DWID - CULVER Marana	Marana	Groundwater	3	709	Yes
115	ASPC APACHE St. Johns	St. Johns	Groundwater	3	540	Yes
116	GW FARMERS WATER CO - SAHUARITA HIGHLAND Maricopa	Maricopa	Groundwater	3	492	Yes
117	BOWIE WID Tucson	Tucson	Groundwater	3	489	Yes
118	Dzilthnaodithhle Boarding School - BIE Window Rock	Window Rock	Groundwater	3	400	Yes
119	PHOENIX CITY OF Phoenix	Phoenix	Surface Water	2	1,695,000	Yes
120	PEORIA CITY OF Peoria	Peoria	Surface Water	2	187,676	Yes
121	TEMPE CITY OF Tempe	Tempe	Surface Water	2	165,000	Yes
122	EPCOR - SAN TAN San Tan Valley	San Tan Valley	Groundwater	2	87,435	Yes
123	ORO VALLEY WATER UTILITY Oro Valley	Oro Valley	Groundwater	2	42,316	Yes
124	EPCOR - ANTHEM El Mirage	El Mirage	Surface Water	2	23,826	Yes
125	Salt River Public Works Scottsdale	Scottsdale	Groundwater	2	20,951	Yes
126	SAFFORD CITY OF Safford	Safford	Groundwater	2	20,600	Yes
127	FLOWING WELLS IRRIGATION DISTRICT Tucson	Tucson	Groundwater	2	16,000	Yes
128	ARIZONA WATER CO - SIERRA VISTA Phoenix	Phoenix	Groundwater	2	9,175	Yes
129	DONEY PARK WATER Flagstaff	Flagstaff	Groundwater	2	8,996	Yes
130	ARIZONA WATER CO - BISBEE Phoenix	Phoenix	Groundwater	2	8,707	Yes
131	ARIZONA WATER CO - MIAMI CLAYPOOL Phoenix	Phoenix	Groundwater	2	8,656	Yes
132	SUNRISE WATER COMPANY Peoria	Peoria	Groundwater	2	6,490	Yes
133	ARIZONA WATER CO - SAN MANUEL Phoenix	Phoenix	Groundwater	2	4,748	Yes
134	KACHINA VILLAGE DWID Flagstaff	Flagstaff	Groundwater	2	3,500	Yes
135	ARIZONA WATER CO - RIMROCK Phoenix	Phoenix	Groundwater	2	3,423	Yes
136	BISBEE DOUGLAS INTL AIRPORT Douglas	Douglas	Groundwater	2	2,600	Yes
137	ASH FORK WATER SERVICE Ash Fork	Ash Fork	Groundwater	2	2,250	Yes
138	Leupp-Birdsprings-Tolani Lake NTUA Ft Defiance	Ft Defiance	Groundwater	2	2,100	Yes
139	MARANA DWID - DERRINGER Marana	Marana	Groundwater	2	1,950	Yes
140	Twin Lakes NTUA Ft Defiance	Ft Defiance	Groundwater	2	1,833	Yes
141	ARIZONA WATER CO - TIERRA GRANDE Phoenix	Phoenix	Groundwater	2	1,796	Yes
142	LAGOON ESTATES WC UNIT 7 Mohave Valley	Mohave Valley	Groundwater	2	1,578	Yes
143	ST DAVID DWID Saint David	Saint David	Groundwater	2	1,255	Yes
144	WATCO WATER Tucson	Tucson	Groundwater	2	1,153	Yes
145	Shonto Junction NTUA Ft Defiance	Ft Defiance	Groundwater	2	1,146	Yes
146	LeChee NTUA Ft Defiance	Ft Defiance	Surface Water	2	1,115	Yes
147	ALPINE DWID Alpine	Alpine	Groundwater	2	1,030	Yes
148	Houck-Querino Canyon NTUA Ft Defiance	Ft Defiance	Groundwater	2	1,023	Yes
149	Havasupai Village Supai	Supai	Groundwater	2	885	Yes
150	PINAL COUNTY JUSTICE COMPLEX Florence	Florence	Groundwater	2	820	Yes
151	ADJC ADOBE MOUNTAIN SCHOOL Phoenix	Phoenix	Groundwater	2	680	Yes
152	EAST SLOPE WATER - WEST Glendale	Glendale	Groundwater	2	655	Yes
153	ARIZONA WATER CO - STANFIELD Phoenix	Phoenix	Groundwater	2	639	Yes
154	EPCOR - WILLOW VALLEY/LAKE CIMARRON El Mirage	El Mirage	Groundwater	2	596	Yes
155	ORANGEWOOD MOBILE HOME PARK Phoenix	Phoenix	Groundwater	2	500	Yes
156	Pisinemo Intertie Sells	Sells	Groundwater	2	472	Yes
157	PARADISE MHP Phoenix	Phoenix	Surface Water	2	460	Yes
158	TOWN & COUNTRY - PRESTON Nogales	Nogales	Groundwater	2	430	Yes
159	CACTUS COUNTRY RV RESORT Tucson	Tucson	Groundwater	2	420	Yes
160	MOBILE GARDENS DWID Wittmann	Wittmann	Groundwater	2	400	Yes
161	CHANDLER CITY OF Chandler	Chandler	Surface Water	1	247,328	Yes
162	GW SANTA CRUZ WATER CO Maricopa	Maricopa	Groundwater	1	84,000	Yes
163	FLAGSTAFF CITY OF Flagstaff	Flagstaff	Surface Water	1	76,960	Yes
164	LIBERTY WATER LPSCO Litchfield Park	Litchfield Park	Groundwater	1	50,770	Yes
165	PRESCOTT CITY OF Prescott	Prescott	Groundwater	1	42,217	Yes
166	EPCOR - CHAPARRAL CITY El Mirage	El Mirage	Surface Water	1	26,026	Yes
167	CITY OF SHOW LOW Show Low	Show Low	Groundwater	1	17,139	Yes
168	DOUGLAS CITY OF Douglas	Douglas	Groundwater	1	16,656	Yes
169	US ARMY FORT HUACHUCA Dragoon	Dragoon	Groundwater	1	15,603	Yes
170	ARIZONA WATER CO - SEDONA Phoenix	Phoenix	Groundwater	1	12,104	Yes
171	GLOBE CITY OF Globe	Globe	Groundwater	1	7,536	Yes
172	HOLBROOK CITY OF Holbrook	Holbrook	Groundwater	1	5,318	Yes
173	GRIC DPW Sacaton Sacaton	Sacaton	Groundwater	1	5,307	Yes
174	NORTH MOHAVE VALLEY Bullhead City	Bullhead City	Groundwater	1	5,190	Yes
175	TOWN OF CAMP VERDE UTILITIES Camp Verde	Camp Verde	Groundwater	1	5,013	Yes
176	GLEN CANYON NRA WAHWEAP Page	Page	Groundwater	1	4,439	Yes
177	ASPC YUMA Yuma	Yuma	Groundwater	1	4,197	Yes
178	GOLDEN VALLEY IMPROVEMENT DISTRICT Kingman	Kingman	Groundwater	1	3,950	Yes
179	EPCOR - WILLOW VALLEY/KING STREET El Mirage	El Mirage	Groundwater	1	3,408	Yes
180	FREEPORT MCMORAN BAGDAD TOWN Bagdad	Bagdad	Groundwater	1	3,200	Yes
181	DESERT FOOTHILLS Bullhead City	Bullhead City	Groundwater	1	3,091	Yes
182	WMATUA Hondah-McNary Whiteriver	Whiteriver	Groundwater	1	2,988	Yes
183	GRIC DPW Casa Blanca_Bapchule Sacaton	Sacaton	Groundwater	1	2,603	Yes
184	GRIC DPW Stotonic Sacaton	Sacaton	Groundwater	1	2,566	Yes
185	CLEARWATER UTILITY COMPANY INC Buckeye	Buckeye	Groundwater	1	2,175	Yes
186	San Carlos Apache Health Center Peridot	Peridot	Groundwater	1	2,085	Yes
187	TOWN OF HUACHUCA CITY Tucson	Tucson	Groundwater	1	1,750	Yes
188	FOREST LAKES WATER IMPROVEMENT DISTRICT Forest Lakes	Forest Lakes	Groundwater	1	1,746	Yes
189	UTILITY SOURCE LLC Queen Creek	Queen Creek	Groundwater	1	1,710	Yes
190	Hotevilla Village Hotevilla	Hotevilla	Groundwater	1	1,601	Yes
191	Many Farms Community School BIA Many Farms	Many Farms	Groundwater	1	1,506	Yes
192	BEARIZONA Williams	Williams	Groundwater	1	1,423	Yes
193	USDJ FBP FED CORR INST SAFFORD Safford	Safford	Groundwater	1	949	Yes
194	VERDE LAKES WATER - DINKY CREEK Camp Verde	Camp Verde	Groundwater	1	875	Yes
195	VERDE LAKES WATER - BIG VALLEY Camp Verde	Camp Verde	Groundwater	1	870	Yes
196	ADOC ASPC FORT GRANT Safford	Safford	Groundwater	1	800	Yes
197	LAKE MOHAVE HIGHLANDS Bullhead City	Bullhead City	Groundwater	1	746	Yes
198	SCUA Beverly Hills San Carlos	San Carlos	Groundwater	1	612	Yes
199	WHITE MOUNTAIN WATER COMPANY Taylor	Taylor	Groundwater	1	475	Yes
200	OAK CREEK VALLEY Clarkdale	Clarkdale	Groundwater	1	450	Yes
201	COUNTRY ESTATES MOBILE HOME PARK Scottsdale	Scottsdale	Groundwater	1	425	Yes
202	EDEN WATER COMPANY INC Eden	Eden	Groundwater	1	400	Yes

Systems with No Violations (298)

298 water systems in Arizona have zero recorded violations. Showing the 50 largest by population served.

TUCSON CITY OF (732,906) MESA CITY OF (466,000) SCOTTSDALE CITY OF (241,361) GLENDALE CITY OF (234,766) ARIZONA WATER CO - PINAL VALLEY (134,432) QUEEN CREEK TOWN OF (95,502) AVONDALE CITY OF (83,001) ARIZONA WATER CO - APACHE JUNCTION (62,055) TOWN OF PRESCOTT VALLEY (57,048) GOODYEAR WATER DEPARTMENT (50,001) METROPOLITAN DWID (45,570) KINGMAN MUNICIPAL WATER (45,000) SURPRISE CITY OF - MOUNTAIN VISTA (40,007) EL MIRAGE CITY OF (39,884) EPCOR - SUN CITY (38,016) EPCOR - SUN CITY WEST (25,796) BERMUDA WATER COMPANY INC (25,000) DESERT OASIS (23,963) COMMUNITY WC OF GREEN VALLEY (22,085) BELLA VISTA CITY WATER SYSTEM (20,045) ARIZONA WATER CO - WHITE TANKS (18,858) USAF DAVIS MONTHAN AFB (18,640) SAHUARITA WATER COMPANY (18,178) LAGO DEL ORO WATER COMPANY (18,132) LIBERTY WATER RIO RICO (17,960) PAYSON TOWN OF (17,682) VAIL WATER COMPANY (17,500) FLORENCE WATER COMPANY (15,900) CITY OF BUCKEYE SONORA - SUNDANCE (15,783) MARANA MUNICIPAL - MARANA (15,162) EPCOR - NORTH EAST AGUA FRIA (14,723) SOMERTON CITY OF (14,197) EPCOR - PARADISE VALLEY/SCOTTSDALE (14,107) ARIZONA WATER CO - OVERGAARD (13,797) ARIZONA WATER CO - LAKESIDE (12,191) ARIZONA WATER CO - ORACLE (10,585) EPCOR - SAN TAN ANTHEM (10,362) FESTIVAL RANCH (10,313) TUCSON WATER CORONA DE TUCSON (10,217) CITY OF BUCKEYE TARTESSO WATER SYSTEM (10,123) WINSLOW CITY OF (9,789) TOLLESON CITY OF (9,300) BEARDSLEY WATER COMPANY 1 (9,002) CCA - ELOY COMPLEX (8,852) GREEN VALLEY DWID (8,687) Chinle-Many Farms-Del Muerto NTUA (8,458) ARIZONA WATER CO - PINEWOOD (8,089) PINE STRAWBERRY WID (8,013) ELOY CITY OF (7,903) BUCKEYE CITY OF (7,008) +248 more

All Water Systems in Arizona (956)

Page 4 of 20, ordered by population served.

System	Population Served	Violations
Crownpoint-Littlewater-Three Mile Point NTUA	3,950	0
Ganado-Burnside-Cornfield-Steamboat NTUA	3,947	3
CAREFREE WATER COMPANY	3,894	0
Kayenta NTUA	3,844	0
SPANISH TRAIL WATER COMPANY	3,822	0
GW SANTA CRUZ WATER CO - RED ROCK	3,813	0
GRAHAM COUNTY UTILITIES - PIMA	3,799	7
GW SAGUARO DIST WATER CO - LAS QUINTAS	3,720	0
Big River Development	3,550	3
ARIZONA WATER CO - PINETOP LAKES	3,513	0
ST JOHNS CITY OF	3,500	0
KACHINA VILLAGE DWID	3,500	2
AZ STATE PRISON - GEO GROUP - KINGMAN	3,500	0
ARIZONA WATER CO - RIMROCK	3,423	2
EPCOR - WILLOW VALLEY/KING STREET	3,408	1
Town of Parker	3,360	0
PINETOP WATER COMMUNITY FACILITIES DIST	3,250	0
SAGUARO WATER COMPANY	3,243	0
CITY OF WILLCOX	3,236	0
VOYAGER WATER COMPANY	3,209	0
FREEPORT MCMORAN BAGDAD TOWN	3,200	1
SCUA Bylas	3,160	32
WILLIAMS CITY OF	3,145	20
GW OCOTILLO WATER - RANCHO DEL SOL LINDO	3,128	0
Grand Canyon West	3,120	10
DESERT FOOTHILLS	3,091	1
WELLTON TOWN OF	3,000	136
WMATUA Hondah-McNary	2,988	1
COTTONWOOD MUNICIPAL WATER VV2	2,893	4
WICKENBURG RANCH ESTATES	2,877	0
QUARTZSITE TOWN OF	2,761	0
CHINO VALLEY TOWN OF	2,742	0
GOODMAN WATER COMPANY	2,656	0
AJO IMPROVEMENT COMPANY	2,654	0
CHANDLER HEIGHTS CITRUS IRRIGATION DIST	2,620	0
GRIC DPW Casa Blanca_Bapchule	2,603	1
BISBEE DOUGLAS INTL AIRPORT	2,600	2
WMATUA Cibecue	2,590	5
Tonto Apache	2,580	0
GRIC DPW Stotonic	2,566	1
FOOTHILLS UTILITIES KINGMAN EAST	2,538	26
PICACHO WATER COMPANY	2,440	0
BLACK CANYON CITY WID	2,437	0
CHINO MEADOWS II	2,350	0
VALLE VERDE WATER COMPANY - EAST	2,331	0
MT TIPTON WATER COMPANY	2,257	0
ASH FORK WATER SERVICE	2,250	2
THUNDERBIRD FARMS DWID	2,231	58
Yavapai Apache - Middle Verde	2,200	0
COTTONWOOD MUNICIPAL WATER VSF1	2,194	4

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Frequently Asked Questions

How many water systems are in Arizona?

Arizona has 956 community water systems tracked by the EPA, serving a combined population of 7,422,128 people.

How many water systems in Arizona have health violations?

435 water systems in Arizona have health-based violations, which include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. These represent 46% of all systems in the state.

What is the total number of water violations in Arizona?

Arizona water systems have accumulated 4,821 total violations across all 956 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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