Arizona Water Systems

Compiled by PlainEnviro · August 25, 2026

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

Water Systems

949

Health-Based Violation Records

5,259

Health Violations

435 systems

Population Served

7,438,245

Arizona 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? (204)

#	System Name	City	Source	Violations	Pop. Served	Health
1	Polacca Polacca	Polacca	Groundwater	223	3,890	Yes
2	Shungopavi Second Mesa	Second Mesa	Groundwater	189	1,430	Yes
3	WELLTON TOWN OF Wellton	Wellton	Surface Water	149	3,000	Yes
4	PAPAGO BUTTE DWID Maricopa	Maricopa	Groundwater	145	530	Yes
5	COTTONWOOD MUNICIPAL WATER CW1 Cottonwood	Cottonwood	Groundwater	144	11,023	Yes
6	Sipaulovi (Lower Sipaulovi/Lower Mishongnovi) Second Mesa	Second Mesa	Groundwater	126	609	Yes
7	Mishongnovi (Upper Sipaulovi/Upper Mishongnovi) Second Mesa	Second Mesa	Groundwater	124	490	Yes
8	Dilkon-Indian Wells-Greasewood-White Cone NTUA Fort Defiance	Fort Defiance	Groundwater	105	4,986	Yes
9	Toadlena NTUA Ft Defiance	Ft Defiance	Groundwater	82	903	Yes
10	SCUA Upper Seven Mile San Carlos	San Carlos	Groundwater	72	8,478	Yes
11	Aneth NTUA Ft Defiance	Ft Defiance	Groundwater	71	1,481	Yes
12	COTTONWOOD MUNICIPAL WATER VV3 Cottonwood	Cottonwood	Groundwater	60	1,458	Yes
13	THUNDERBIRD FARMS DWID Maricopa	Maricopa	Groundwater	58	2,231	Yes
14	MARICOPA MOUNTAIN DWID 1 Maricopa	Maricopa	Groundwater	54	450	Yes
15	OAK CREEK WATER DISTRICT Sedona	Sedona	Groundwater	53	1,507	Yes
16	SIERRA PACIFIC MOBILE MANOR Yuma	Yuma	Groundwater	48	816	Yes
17	CITY OF YUMA Yuma	Yuma	Surface Water	46	103,264	Yes
18	Fort McDowell Community Fountain Hills	Fountain Hills	Groundwater	46	7,260	Yes
19	EPCOR - LAKESIDE El Mirage	El Mirage	Surface Water	45	1,775	Yes
20	EPCOR - MOOVALYA KEYS El Mirage	El Mirage	Surface Water	43	1,298	Yes
21	EPCOR - MARINA VILLAGE El Mirage	El Mirage	Surface Water	39	528	Yes
22	Sweetwater NTUA Ft Defiance	Ft Defiance	Surface Water	37	2,014	Yes
23	EPCOR - PARKER DAM El Mirage	El Mirage	Surface Water	37	429	Yes
24	Hopi High School - BIA Keams Canyon	Keams Canyon	Groundwater	35	1,005	Yes
25	SCUA Bylas San Carlos	San Carlos	Groundwater	34	3,160	Yes
26	DESERT GARDENS RV RESORT CO-OP, INC Florence	Florence	Groundwater	33	532	Yes
27	BIG PARK WATER COMPANY Sedona	Sedona	Groundwater	29	7,392	Yes
28	Cameron NTUA Fort Defiance	Fort Defiance	Groundwater	28	742	Yes
29	Fort Defiance-Window Rock-St Michaels NTUA Ft Defiance	Ft Defiance	Groundwater	27	12,869	Yes
30	FOOTHILLS UTILITIES KINGMAN EAST Yuma	Yuma	Groundwater	26	2,538	Yes
31	SHEPARD WATER COMPANY Yuma	Yuma	Groundwater	24	430	Yes
32	MORENCI WATER ELEC CO MAIN Phoenix	Phoenix	Surface Water	21	4,108	Yes
33	WILLIAMS CITY OF Williams	Williams	Surface Water	21	3,145	Yes
34	Dishchii Bikoh Community School - BIA Charter White River	White River	Groundwater	21	622	Yes
35	Red Mesa NTUA Ft Defiance	Ft Defiance	Surface Water	20	1,023	Yes
36	COTTONWOOD MUNICIPAL WATER VV6 Cottonwood	Cottonwood	Groundwater	18	4,509	Yes
37	COPPER MOUNTAIN RANCH CFD Casa Grande	Casa Grande	Groundwater	18	1,071	Yes
38	Colorado River Regional Water System Parker	Parker	Groundwater	17	3,476	Yes
39	POMERENE DWID Pomerene	Pomerene	Groundwater	17	1,618	Yes
40	EPCOR - HOLIDAY HARBOR El Mirage	El Mirage	Surface Water	17	559	Yes
41	Lower Moencopi - Spring Source Tuba City	Tuba City	Groundwater	17	465	Yes
42	CENTENNIAL PARK DWID Colorado City	Colorado City	Groundwater	16	1,578	Yes
43	VALLE ESCONDIDO Maricopa	Maricopa	Groundwater	16	405	Yes
44	CAMERON TRADING POST Cameron	Cameron	Groundwater	15	1,270	Yes
45	COLDWATER CANYON 1 Tucson	Tucson	Groundwater	15	541	Yes
46	GRAND CANYON NATIONAL PARK Grand Canyon	Grand Canyon	Groundwater	13	16,590	Yes
47	SPRINGERVILLE TOWN OF Springerville	Springerville	Groundwater	13	1,972	Yes
48	TOMBSTONE CITY OF Tombstone	Tombstone	Surface Water	13	1,545	Yes
49	Cocopah Bend RV & Golf Resort Somerton	Somerton	Groundwater	13	1,095	Yes
50	SCUA Lower Peridot San Carlos	San Carlos	Groundwater	13	702	Yes
51	COUNTRY LANE TRAILER PARK Show Low	Show Low	Groundwater	13	450	Yes
52	Kaibab Village Pipe Spring	Pipe Spring	Groundwater	12	407	Yes
53	MARICOPA CONSOLIDATED DWID Maricopa	Maricopa	Groundwater	11	928	Yes
54	ELFRIDA WID Elfrida	Elfrida	Groundwater	11	800	Yes
55	Quechan Utility Yuma	Yuma	Groundwater	10	5,660	Yes
56	Grand Canyon West Peach Springs	Peach Springs	Groundwater	10	3,120	Yes
57	PUEBLO DEL SOL WATER COMPANY Sierra Vista	Sierra Vista	Groundwater	9	12,804	Yes
58	USAF LUKE AIR FORCE BASE Luke Afb	Luke Afb	Surface Water	9	8,440	Yes
59	SOUTHLAND UTILITIES - GOLDEN ACRES	-	Groundwater	9	1,614	Yes
60	TONTO BASIN WATER - CACTUS FOREST Payson	Payson	Groundwater	9	613	Yes
61	SUN VALLEY FARMS UNIT VI San Tan Valley	San Tan Valley	Groundwater	9	600	Yes
62	CITY OF BUCKEYE - VALENCIA TOWN DIVISION	-	Groundwater	8	30,377	Yes
63	GRIC DPW Wild Horse Pass Sacaton	Sacaton	Groundwater	8	22,795	Yes
64	CAVE CREEK WATER Cave Creek	Cave Creek	Surface Water	8	5,895	Yes
65	ADOC EYMAN UNIT Phoenix	Phoenix	Groundwater	8	3,969	Yes
66	DUNCAN TOWN OF Duncan	Duncan	Groundwater	8	605	Yes
67	GW -BWC, INC- SUNSHINE Maricopa	Maricopa	Groundwater	8	604	Yes
68	COUNTRY CLUB ACRES WATER INC Wickenburg	Wickenburg	Groundwater	8	431	Yes
69	GRAHAM COUNTY UTILITIES - PIMA Pima	Pima	Groundwater	7	3,799	Yes
70	FEDERAL CORRECTION INSTITUTION Phoenix	Phoenix	Groundwater	7	1,500	Yes
71	PARK WATER COMPANY INC Tucson	Tucson	Groundwater	7	416	Yes
72	FISHERS LANDING RESORT Yuma	Yuma	Surface Water	7	402	Yes
73	APACHE JUNCTION WATER DISTRICT Apache Junction	Apache Junction	Surface Water	6	15,610	Yes
74	USMC YUMA MAIN SYSTEM Yuma	Yuma	Surface Water	6	8,353	Yes
75	KEARNY TOWN OF Kearny	Kearny	Groundwater	6	1,950	Yes
76	PONDEROSA UTILITY CORP Flagstaff	Flagstaff	Groundwater	6	1,585	Yes
77	TONTO BASIN WATER - LR GARDENS WEST Payson	Payson	Groundwater	6	1,172	Yes
78	HEBER DWID Heber	Heber	Groundwater	6	839	Yes
79	LAKEWOOD ESTATES WATER COMPANY	-	Groundwater	6	722	Yes
80	NOGALES CITY OF Nogales	Nogales	Groundwater	5	22,000	Yes
81	WMATUA Miner Flat Whiteriver	Whiteriver	Surface Water	5	15,570	Yes
82	WMATUA Cibecue Whiteriver	Whiteriver	Groundwater	5	2,590	Yes
83	ADOC FLORENCE ASP Phoenix	Phoenix	Groundwater	5	1,001	Yes
84	BIA Keams Canyon Keams Canyon	Keams Canyon	Groundwater	5	925	Yes
85	RANCHO DEL CONEJO COMM WATER COOP Tucson	Tucson	Groundwater	5	900	Yes
86	ADAMAN MUTUAL WATER COMPANY Litchfield Park	Litchfield Park	Groundwater	5	700	Yes
87	SCUA Beverly Hills San Carlos	San Carlos	Groundwater	5	612	Yes
88	ASPC APACHE St. Johns	St. Johns	Groundwater	5	540	Yes
89	Dilcon Community Boarding School BIA Winslow	Winslow	Groundwater	5	473	Yes
90	ARIZONA TRAINING PROGRAM Phoenix	Phoenix	Groundwater	5	470	Yes
91	LAKE HAVASU CITY OF Lake Havasu City	Lake Havasu City	Groundwater	4	54,610	Yes
92	SAN LUIS CITY OF San Luis	San Luis	Groundwater	4	39,705	Yes
93	PIMA UTILITIES Phoenix	Phoenix	Groundwater	4	20,000	Yes
94	Farmington Rural-Shiprock-Beclabito NTUA Ft Defiance	Ft Defiance	Surface Water	4	15,233	Yes
95	GOLDEN SHORES WATER COMPANY Williams	Williams	Groundwater	4	3,970	Yes
96	COTTONWOOD MUNICIPAL WATER VV2 Cottonwood	Cottonwood	Groundwater	4	2,893	Yes
97	COTTONWOOD MUNICIPAL WATER VSF1 Cottonwood	Cottonwood	Groundwater	4	2,194	Yes
98	MESCAL LAKES WATER SYSTEM Glendale	Glendale	Groundwater	4	1,390	Yes
99	MARANA DWID - CULVER Marana	Marana	Groundwater	4	709	Yes
100	GILBERT, TOWN OF Gilbert	Gilbert	Surface Water	3	247,600	Yes
101	EPCOR - AGUA FRIA El Mirage	El Mirage	Surface Water	3	127,718	Yes
102	BULLHEAD CITY MOHAVE Bullhead City	Bullhead City	Groundwater	3	36,330	Yes
103	FOOTHILLS WATER AND SEWER LLC Yuma	Yuma	Surface Water	3	32,425	Yes
104	FLOWING WELLS IRRIGATION DISTRICT Tucson	Tucson	Groundwater	3	16,000	Yes
105	Ak-Chin Village Maricopa	Maricopa	Surface Water	3	11,646	Yes
106	ARIZONA WATER CO - SIERRA VISTA Phoenix	Phoenix	Groundwater	3	9,175	Yes
107	ARIZONA WATER CO - BISBEE Phoenix	Phoenix	Groundwater	3	8,707	Yes
108	ARIZONA WATER CO - MIAMI CLAYPOOL Phoenix	Phoenix	Groundwater	3	8,656	Yes
109	PAGE CITY OF Page	Page	Surface Water	3	7,420	Yes
110	ARIZONA WATER CO - SAN MANUEL Phoenix	Phoenix	Groundwater	3	4,748	Yes
111	ASPC LEWIS COMPLEX WATER SYSTEM Buckeye	Buckeye	Groundwater	3	4,300	Yes
112	CORDES LAKES WATER COMPANY Litchfield Park	Litchfield Park	Groundwater	3	4,257	Yes
113	Ganado-Burnside-Cornfield-Steamboat NTUA Ft Defiance	Ft Defiance	Groundwater	3	3,947	Yes
114	Big River Development Parker	Parker	Groundwater	3	3,550	Yes
115	ARIZONA WATER CO - RIMROCK Phoenix	Phoenix	Groundwater	3	3,423	Yes
116	CLEARWATER UTILITY COMPANY INC Buckeye	Buckeye	Groundwater	3	2,175	Yes
117	VOYAGER AT WHITE MOUNTAIN LAKES WC Pinetop	Pinetop	Groundwater	3	1,997	Yes
118	MARANA DWID - DERRINGER Marana	Marana	Groundwater	3	1,950	Yes
119	ARIZONA WATER CO - TIERRA GRANDE Phoenix	Phoenix	Groundwater	3	1,796	Yes
120	CLEAR SPRINGS UTILITY MAIN Glendale	Glendale	Groundwater	3	1,385	Yes
121	Kykotsmovi Kykotsmovi	Kykotsmovi	Groundwater	3	1,302	Yes
122	AWC - CASA GRANDE WEST WATER COMPANY Phoenix	Phoenix	Groundwater	3	943	Yes
123	SANDARIO WATER COMPANY Glendale	Glendale	Groundwater	3	870	Yes
124	PINAL COUNTY JUSTICE COMPLEX	-	Groundwater	3	820	Yes
125	CIRCLE CITY - CITY OF SURPRISE Surprise	Surprise	Groundwater	3	815	Yes
126	GREENEHAVEN WATER COMPANY	-	Groundwater	3	807	Yes
127	SILVERVIEW RV PARK Bullhead City	Bullhead City	Groundwater	3	800	Yes
128	ARIZONA WATER CO - STANFIELD Phoenix	Phoenix	Groundwater	3	639	Yes
129	GW FARMERS WATER CO - SAHUARITA HIGHLAND Maricopa	Maricopa	Groundwater	3	492	Yes
130	BOWIE WID	-	Groundwater	3	489	Yes
131	Dzilthnaodithhle Boarding School - BIE Window Rock	Window Rock	Groundwater	3	400	Yes
132	PHOENIX CITY OF	-	Surface Water	2	1,695,000	Yes
133	PEORIA CITY OF Peoria	Peoria	Surface Water	2	187,676	Yes
134	TEMPE CITY OF Tempe	Tempe	Surface Water	2	165,000	Yes
135	EPCOR - SAN TAN San Tan Valley	San Tan Valley	Groundwater	2	87,435	Yes
136	GW SANTA CRUZ WATER CO Maricopa	Maricopa	Groundwater	2	84,000	Yes
137	LIBERTY WATER LPSCO Litchfield Park	Litchfield Park	Groundwater	2	55,810	Yes
138	ORO VALLEY WATER UTILITY Oro Valley	Oro Valley	Groundwater	2	42,316	Yes
139	EPCOR - ANTHEM El Mirage	El Mirage	Surface Water	2	23,826	Yes
140	Salt River Public Works Scottsdale	Scottsdale	Groundwater	2	20,951	Yes
141	SAFFORD CITY OF Safford	Safford	Groundwater	2	20,600	Yes
142	US ARMY FORT HUACHUCA Dragoon	Dragoon	Groundwater	2	15,603	Yes
143	ARIZONA WATER CO - SEDONA Phoenix	Phoenix	Groundwater	2	12,104	Yes
144	DONEY PARK WATER Flagstaff	Flagstaff	Groundwater	2	8,996	Yes
145	GLOBE CITY OF Globe	Globe	Groundwater	2	7,536	Yes
146	SUNRISE WATER COMPANY Peoria	Peoria	Groundwater	2	6,490	Yes
147	TOWN OF CAMP VERDE UTILITIES Camp Verde	Camp Verde	Groundwater	2	5,013	Yes
148	ASPC YUMA Yuma	Yuma	Groundwater	2	4,197	Yes
149	KACHINA VILLAGE DWID Flagstaff	Flagstaff	Groundwater	2	3,500	Yes
150	EPCOR - WILLOW VALLEY/KING STREET El Mirage	El Mirage	Groundwater	2	3,408	Yes
151	BISBEE DOUGLAS INTL AIRPORT Douglas	Douglas	Groundwater	2	2,600	Yes
152	ASH FORK WATER SERVICE Ash Fork	Ash Fork	Groundwater	2	2,250	Yes
153	Leupp-Birdsprings-Tolani Lake NTUA Ft Defiance	Ft Defiance	Groundwater	2	2,100	Yes
154	Twin Lakes NTUA Ft Defiance	Ft Defiance	Groundwater	2	1,833	Yes
155	TOWN OF HUACHUCA CITY Tucson	Tucson	Groundwater	2	1,750	Yes
156	LAGOON ESTATES WC UNIT 7 Mohave Valley	Mohave Valley	Groundwater	2	1,578	Yes
157	ST DAVID DWID Saint David	Saint David	Groundwater	2	1,255	Yes
158	WATCO WATER	-	Groundwater	2	1,153	Yes
159	Shonto Junction NTUA Ft Defiance	Ft Defiance	Groundwater	2	1,146	Yes
160	LeChee NTUA Ft Defiance	Ft Defiance	Surface Water	2	1,115	Yes
161	ALPINE DWID Alpine	Alpine	Groundwater	2	1,030	Yes
162	Houck-Querino Canyon NTUA Ft Defiance	Ft Defiance	Groundwater	2	971	Yes
163	Havasupai Village Supai	Supai	Groundwater	2	885	Yes
164	VERDE LAKES WATER - DINKY CREEK Camp Verde	Camp Verde	Groundwater	2	875	Yes
165	VERDE LAKES WATER - BIG VALLEY Camp Verde	Camp Verde	Groundwater	2	870	Yes
166	ADOC ASPC FORT GRANT Safford	Safford	Groundwater	2	800	Yes
167	ADJC ADOBE MOUNTAIN SCHOOL Phoenix	Phoenix	Groundwater	2	680	Yes
168	EAST SLOPE WATER - WEST Glendale	Glendale	Groundwater	2	655	Yes
169	EPCOR - WILLOW VALLEY/LAKE CIMARRON El Mirage	El Mirage	Groundwater	2	596	Yes
170	GLEN CANYON NRA WAHWEAP Page	Page	Groundwater	2	579	Yes
171	ORANGEWOOD MOBILE HOME PARK Phoenix	Phoenix	Groundwater	2	500	Yes
172	WHITE MOUNTAIN WATER COMPANY Taylor	Taylor	Groundwater	2	475	Yes
173	Pisinemo Intertie Sells	Sells	Groundwater	2	472	Yes
174	PARADISE MHP Phoenix	Phoenix	Surface Water	2	460	Yes
175	TOWN & COUNTRY - PRESTON Nogales	Nogales	Groundwater	2	430	Yes
176	CACTUS COUNTRY RV RESORT Tucson	Tucson	Groundwater	2	420	Yes
177	MOBILE GARDENS DWID Wittmann	Wittmann	Groundwater	2	400	Yes
178	CHANDLER CITY OF Chandler	Chandler	Surface Water	1	247,328	Yes
179	FLAGSTAFF CITY OF Flagstaff	Flagstaff	Surface Water	1	79,796	Yes
180	PRESCOTT CITY OF Prescott	Prescott	Groundwater	1	42,217	Yes
181	EPCOR - CHAPARRAL CITY El Mirage	El Mirage	Surface Water	1	26,026	Yes
182	CITY OF SHOW LOW Show Low	Show Low	Groundwater	1	17,139	Yes
183	DOUGLAS CITY OF Douglas	Douglas	Groundwater	1	16,656	Yes
184	FLORENCE WATER COMPANY Florence	Florence	Groundwater	1	15,900	Yes
185	GRIC DPW Sacaton Sacaton	Sacaton	Groundwater	1	5,307	Yes
186	NORTH MOHAVE VALLEY Bullhead City	Bullhead City	Groundwater	1	5,190	Yes
187	HOLBROOK CITY OF Holbrook	Holbrook	Groundwater	1	4,833	Yes
188	ADOC TUCSON Tucson	Tucson	Groundwater	1	4,500	Yes
189	GOLDEN VALLEY IMPROVEMENT DISTRICT Kingman	Kingman	Groundwater	1	3,950	Yes
190	FREEPORT MCMORAN BAGDAD TOWN Bagdad	Bagdad	Groundwater	1	3,200	Yes
191	DESERT FOOTHILLS Bullhead City	Bullhead City	Groundwater	1	3,091	Yes
192	WMATUA Hondah-McNary Whiteriver	Whiteriver	Groundwater	1	2,988	Yes
193	GRIC DPW Casa Blanca_Bapchule Sacaton	Sacaton	Groundwater	1	2,603	Yes
194	GRIC DPW Stotonic Sacaton	Sacaton	Groundwater	1	2,566	Yes
195	San Carlos Apache Health Center Peridot	Peridot	Groundwater	1	2,085	Yes
196	FOREST LAKES WATER IMPROVEMENT DISTRICT Forest Lakes	Forest Lakes	Groundwater	1	1,746	Yes
197	UTILITY SOURCE LLC Queen Creek	Queen Creek	Groundwater	1	1,710	Yes
198	Hotevilla Village Hotevilla	Hotevilla	Groundwater	1	1,601	Yes
199	Many Farms Community School BIA Many Farms	Many Farms	Groundwater	1	1,506	Yes
200	BEARIZONA Williams	Williams	Groundwater	1	1,423	Yes
201	USDJ FBP FED CORR INST SAFFORD Safford	Safford	Groundwater	1	949	Yes
202	LAKE MOHAVE HIGHLANDS Bullhead City	Bullhead City	Groundwater	1	746	Yes
203	OAK CREEK VALLEY Clarkdale	Clarkdale	Groundwater	1	450	Yes
204	EDEN WATER COMPANY INC Eden	Eden	Groundwater	1	400	Yes

Systems with No Violations (296)

296 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) AVONDALE CITY OF (96,130) QUEEN CREEK TOWN OF (95,502) 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) 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) BEARDSLEY WATER COMPANY 1 (10,263) 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) 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) QUAIL CREEK WATER COMPANY (6,812) +246 more

All Water Systems in Arizona (949)

Page 3 of 19, ordered by population served.

System	Population Served	Violations
AVRA WATER COOP INC	6,685	0
SUNRISE WATER COMPANY	6,490	2
WICKENBURG TOWN OF	6,481	0
Tuba City NTUA	6,276	0
ROSE VALLEY WATER COMPANY	6,202	0
VALLEY PIONEERS WATER COMPANY INC	6,063	0
VALLEY UTILITIES WATER COMPANY GLENDALE	5,940	0
CAVE CREEK WATER	5,895	8
Quechan Utility	5,660	10
GW FARMERS WATER CO - CONTINENTAL	5,592	0
SNOWFLAKE TOWN OF	5,590	0
METROPOLITAN DWID - DIABLO VILLAGE	5,542	0
PONDEROSA DWID	5,375	0
BENSON, CITY OF WATER SYSTEM	5,355	0
EPCOR- RIO VERDE	5,330	0
GRIC DPW Sacaton	5,307	1
MARANA MUNICIPAL - PICTURE ROCKS	5,278	0
MARANA MUNICIPAL - HARTMAN VISTAS	5,248	0
Pinon-District 4 NTUA	5,195	0
NORTH MOHAVE VALLEY	5,190	1
TOWN OF CAMP VERDE UTILITIES	5,013	2
Dilkon-Indian Wells-Greasewood-White Cone NTUA	4,986	105
CLARKDALE MUNICIPAL WATER SYSTEM	4,920	0
EPCOR - TIERRA DEL RIO	4,868	0
HOLBROOK CITY OF	4,833	1
EPCOR - LAKE HAVASU	4,788	0
ARIZONA WATER CO - SAN MANUEL	4,748	3
EAGAR TOWN OF	4,590	0
MARANA MUNICIPAL - AIRLINE LAMBERT	4,568	0
Mariano Lake-Pinedale-Church Rock NTUA	4,562	0
ORO VALLEY WATER COUNTRYSIDE	4,534	0
COTTONWOOD MUNICIPAL WATER VV6	4,509	18
ADOC TUCSON	4,500	1
RAY WATER COMPANY INC	4,495	0
ARIZONA WATER CO - SUPERIOR	4,393	0
ASPC LEWIS COMPLEX WATER SYSTEM	4,300	3
CORDES LAKES WATER COMPANY	4,257	3
METROPOLITAN DWID - HUB	4,252	0
DESERT HILLS WATER	4,220	0
ASPC YUMA	4,197	2
TOWN OF TAYLOR	4,190	0
MORENCI WATER ELEC CO MAIN	4,108	21
Sells Intertie	4,000	0
GW FARMERS WATER CO - SANTA RITA SPRINGS	3,990	0
GOLDEN SHORES WATER COMPANY	3,970	4
ADOC EYMAN UNIT	3,969	8
GOLDEN VALLEY IMPROVEMENT DISTRICT	3,950	1
Crownpoint-Littlewater-Three Mile Point NTUA	3,950	0
Ganado-Burnside-Cornfield-Steamboat NTUA	3,947	3
CAREFREE WATER COMPANY	3,894	0

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Frequently Asked Questions

How many water systems are in Arizona?

Arizona has 949 community water systems tracked by the EPA, serving a combined population of 7,438,245 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.

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

PlainEnviro's health-based EPA SDWIS extract contains 5,259 records joined to 949 active community water systems in Arizona. Monitoring and reporting records are not included.

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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

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

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