Arizona Drinking Water Compliance Records
763 water systems serving 7,178,595 people. 30,461 historical EPA violation records in the Q2 2026 snapshot.
TapScore Compliance-History Grades
A
372
49%
B
168
22%
C
166
22%
D
50
7%
F
7
1%
763
Water Systems
7,178,595
Population Served
30,461
Historical Records
1,137
Health-Based (All Years)
Systems With the Most Recent EPA Records
FOOTHILLS WATER AND SEWER LLC
32,425 served467 historical records173 recent
C
BULLHEAD CITY MOHAVE
36,330 served383 historical records101 recent
C
PUEBLO DEL SOL WATER COMPANY
12,804 served608 historical records85 recent
D
CHANDLER CITY OF
247,328 served383 historical records68 recent
C
BIG PARK WATER COMPANY
7,392 served201 historical records65 recent
D
METROPOLITAN DWID
45,570 served140 historical records49 recent
C
ADOC ASPC FORT GRANT
800 served397 historical records45 recent
D
WELLTON TOWN OF
3,000 served121 historical records44 recent
F
FLOWING WELLS IRRIGATION DISTRICT
16,000 served246 historical records38 recent
D
RIM TRAIL DWID
200 served105 historical records37 recent
D
Large Systems With No Recent Records
TEMPE CITY OF
165,000 served70 historical records
A
QUEEN CREEK TOWN OF
95,502 served49 historical records
A
EPCOR - SAN TAN
87,435 served20 historical records
A
ARIZONA WATER CO - APACHE JUNCTION
62,055 served20 historical records
A
ORO VALLEY WATER UTILITY
42,316 served655 historical records
A
SURPRISE CITY OF - MOUNTAIN VISTA
40,007 served40 historical records
A
EPCOR - SUN CITY
38,016 served43 historical records
A
EPCOR - SUN CITY WEST
25,796 served11 historical records
A
DESERT OASIS
23,963 served11 historical records
A
COMMUNITY WC OF GREEN VALLEY
22,085 served40 historical records
A
Largest Water Systems in Arizona
| Water System | Grade | Population | Historical Records |
|---|---|---|---|
| PHOENIX CITY OF | B | 1,695,000 | 13 |
| TUCSON CITY OF | C | 732,906 | 737 |
| MESA CITY OF | C | 466,000 | 940 |
| GILBERT, TOWN OF | C | 247,600 | 319 |
| CHANDLER CITY OF | C | 247,328 | 383 |
| SCOTTSDALE CITY OF | B | 241,361 | 211 |
| GLENDALE CITY OF | B | 234,766 | 162 |
| PEORIA CITY OF | C | 187,676 | 1140 |
| TEMPE CITY OF | A | 165,000 | 70 |
| ARIZONA WATER CO - PINAL VALLEY | B | 134,432 | 50 |
| EPCOR - AGUA FRIA | C | 127,718 | 43 |
| CITY OF YUMA | D | 103,264 | 52 |
| AVONDALE CITY OF | B | 96,130 | 46 |
| QUEEN CREEK TOWN OF | A | 95,502 | 49 |
| EPCOR - SAN TAN | A | 87,435 | 20 |
| GW SANTA CRUZ WATER CO | D | 84,000 | 14 |
| FLAGSTAFF CITY OF | C | 79,796 | 308 |
| ARIZONA WATER CO - APACHE JUNCTION | A | 62,055 | 20 |
| TOWN OF PRESCOTT VALLEY | B | 57,048 | 86 |
| LIBERTY WATER LPSCO | B | 55,810 | 49 |
Contaminants in Arizona
Lead in ArizonaArsenic in ArizonaNitrate in ArizonaFluoride in ArizonaPFOS in ArizonaPFOA in ArizonaTHMs in ArizonaHAA5 in Arizona
Cities in Arizona
PHOENIX(43)TUCSON(112)MESA(2)EL MIRAGE(20)CHANDLER(8)GLENDALE(20)GILBERT(5)SCOTTSDALE(9)SURPRISE(13)PEORIA(5)TEMPE(4)YUMA(25)CASA GRANDE(9)MARICOPA(40)SAN TAN VALLEY(4)QUEEN CREEK(3)JOHNSON RANCH(2)FLAGSTAFF(16)AVONDALE(1)LITCHFIELD PARK(8)APACHE JUNCTION(4)BULLHEAD CITY(15)SIERRA VISTA(17)BUCKEYE(16)KINGMAN(13)PRESCOTT VALLEY(5)LAKE HAVASU CITY(4)DEWEY(3)PRESCOTT(23)GOODYEAR(2)GREEN VALLEY(8)ORO VALLEY(3)SAN LUIS(1)SUN CITY(4)MARANA(12)SHOW LOW(11)FORT MOHAVE(3)PAYSON(27)FOUNTAIN HILLS(1)SUN CITY WEST(1)SEDONA(19)NOGALES(5)CATALINA(6)ANTHEM(1)SAHUARITA(10)COTTONWOOD(11)FLORENCE(7)HOLLYWOOD(4)SAFFORD(4)VAIL(9)SUN LAKES(2)DOUGLAS(6)WHITE TANKS(1)DAVIS-MONTHAN AFB(1)RIO RICO(1)HEBER(6)ELOY(4)GRAND CANYON(2)DES PERES(33)PINETOP(8)CHEROKEE(4)CHOCTAW(4)DRAGOON(2)TOWN OF BUCKEYE-SONO(1)FORT HUACHUCA(2)PARADISE VALLEY(2)SOMERTON(1)BISBEE(4)WILLIAMS(6)ORACLE(1)CAVE CREEK(3)WINSLOW(2)GOLDEN VALLEY(3)WICKENBURG(5)TOLLESON(1)GLOBE(6)CAMP VERDE(12)CHINO VALLEY(12)PAGE(3)LUKE AFB(2)MIAMI(1)PINE(4)MUNDS PARK(1)BENSON(5)HOLBROOK(4)AJO(5)MOHAVE VALLEY(6)ATMORE(1)MORENCI(2)SUPERIOR(3)SNOWFLAKE(2)CLARKDALE(3)RIO VERDE(1)QUARTZSITE(4)TAYLOR(3)PARKER(7)SAN MANUEL(1)EAGAR(2)PIMA(3)CORDES LAKES(1)