Tapcensus

Arizona

Pinal County drinking water quality

95 active public water systems serve 506,397 people in Pinal County. 15 are compliant, 80 had at least one EPA violation in the past three years, 0 are designated serious violators, and 4 carry a health flag.

Active systems 95 64 community systems
People served 506K by public water systems
Systems with violations 80 84% of active systems, past 3 years
Serious violators 0 4 systems carry a health flag

Needs attention

Eloy City of AZ0411030 · Eloy · Community water system · Serves 8,999 6 rules violated in the past three years. Unresolved: Groundwater Rule (GWR) and Revised Total Coliform Rule (RTCR).
Adoc Eyman Unit AZ0411705 · Florence · Community water system · Serves 3,969 8 rules violated in the past three years. Unresolved: Groundwater Rule (GWR), Public Notification Rule, Revised Total Coliform Rule (RTCR), TTHM (Total Trihalomethanes), and Total Haloacetic Acids (HAA5).
Pinal County Justice Complex AZ0411560 · Florence · Community water system · Serves 820 6 rules violated in the past three years. Unresolved: Groundwater Rule (GWR) and Lead and Copper Rule (LCR).
Kelvin Simmons Coop AZ0411035 · Riverside · Non-Transient non-community system · Serves 28 6 rules violated in the past three years. Unresolved: Lead and Copper Rule (LCR) and Revised Total Coliform Rule (RTCR).

Community water systems

64 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Arizona Water CO Pinal Valley
Casa Grande 		134,432 2 0
Epcor San Tan
Johnson Ranch 		87,435 3 0
GW Santa Cruz Water CO
Maricopa 		84,000 7 0
Arizona Water CO Apache Junction
Apache Junction 		62,055 0 0
Lago del Oro Water Company
Catalina 		18,132 2 0
Apache Junction Water District
Apache Junction 		15,610 6 0
Florence Water Company
Florence 		14,593 5 1
Arizona Water CO Oracle
Oracle 		10,585 0 0
Epcor San Tan Anthem
Johnson Ranch 		10,362 2 0
Eloy City of
Eloy 		8,999 6 1
Cca Eloy Complex
Eloy 		8,852 3 0
Arizona Water CO San Manuel
San Manuel 		4,737 1 0
GW Santa Cruz Water CO Red Rock
Red Rock 		4,248 1 0
Arizona Water CO Superior
Superior 		4,232 0 0
Adoc Eyman Unit
Florence 		3,969 8 2
Goodman Water Company
Catalina 		2,668 2 0
Picacho Water Company
Casa Grande 		2,440 3 1
Thunderbird Farms Dwid
Maricopa 		2,315 2 0
Kearny Town of
Kearny 		1,950 2 0
GW Santa Cruz Water Maricopa SW
Maricopa 		1,848 1 0
Arizona Water CO Tierra Grande
Casa Grande 		1,819 1 0
Queen Valley Dwid
Superior 		1,200 1 0
Mammoth Town of
Mammoth 		1,181 6 1
Copper Mountain Ranch Cfd
Maricopa 		1,071 4 0
Adoc Florence Asp
Florence 		1,001 8 4
Awc Casa Grande West Water Company
Casa Grande 		951 0 0
Maricopa Consolidated Dwid
Maricopa 		928 4 1
Pinal County Justice Complex
Florence 		820 6 2
Tonto Basin Water Cactus Forest
Florence 		730 0 0
Papago Butte Dwid
Maricopa 		700 4 1
Arizona Water CO Stanfield
Casa Grande 		628 1 0
Sun Valley Farms Unit VI
Queen Creek 		600 7 2
Desert Gardens RV Resort Co-Op, INC
Florence 		532 2 0
Arizona Training Program
Coolidge 		470 8 2
Maricopa Mountain Dwid 1
Stanfield 		450 2 0
Park Water Company INC
Florence 		427 4 0
Valle Escondido
Maricopa 		405 7 0
Picacho Peak RV Resort
Red Rock 		400 6 1
Silverbell Irrigation & Drainage Dist
Eloy 		375 6 0
Skyline Resort RV Park
Magma 		375 6 1
Picacho Dwid
Picacho 		285 4 0
Villa Grande Dwid
Eloy 		283 7 0
Sunland Water Company
Arizona City 		227 1 0
Arizonian RV Resort
Apache Junction 		225 6 1
Whispering Wind Mobile Home Park
Coolidge 		200 4 1
The Oaks Mobile Home Park
Superior 		180 2 0
Awc Casa Grande South Water Company
Casa Grande 		176 1 0
Sierra Vista RV Park
Casa Grande 		160 4 0
Antelope Peak Dwid
Stanfield 		150 6 2
Maricopa Mountain Dwid 2
Stanfield 		120 0 0
Non-community systems (31: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Silver Bell Army Heliport
Marana 		500 2 0
Town of Florence Rodeo Well
Florence 		500 0 0
Goldfield Ghost Town
Apache Junction 		450 0 0
Marana Aerospace Solutions
Marana 		400 4 0
JO Combs Elementary School
Queen Creek 		325 4 2
Resolution Copper Company
Superior 		300 2 0
Biosphere II
Oracle 		221 1 0
Nissan Technical Center
Stanfield 		200 2 0
Picacho Elementary School District
Picacho 		200 5 0
Vorelco Test Facility
Vorello 		200 1 0
McPrd San Tan Mtn Park
Queen Creek 		150 0 0
John Wayne RV Ranch
Stanfield 		125 2 0
Rancho Sonora Inn RV Park
Rancho Sonora Inn 		125 0 0
Triangle Y Ranch Camp
Oracle 		125 2 1
AZ State Parks Picacho Peak
Picacho 		121 1 0
Usfs Cnf Pepper Sauce
Oracle 		120 0 0
Arizona National Guard Florence
Florence 		110 1 0
Arizona Ziplines
Oracle 		100 0 0
AZ State Pks Oracle State Park
Oracle 		100 0 0
Central AZ College Aravaipa
Winkelman 		100 3 1
Coolidge Florence Elks Lodge 2350
Florence 		100 2 0
Hitching Post
Apache Junction 		100 2 0
Maricopa Agriculture Center
Maricopa 		100 6 0
Nissan Technical Center Drivers Area
Stanfield 		100 0 0
Ussocom Parachute Training
Marana 		48 1 0
Awc Coolidge City of Municipal Airport
Coolidge 		40 1 0
Youth Haven Ranches
Tucson 		40 2 0
GW Santa Cruz Water CO Picacho Cove
Coolidge 		35 2 0
EL Rancho Robles
Oracle 		34 1 0
Kelvin Simmons Coop
Riverside 		28 6 1
Scotts Miracle Gro
Maricopa 		25 2 0
Inactive systems (185, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Arizona records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.