Tapcensus

Arizona

Cochise County drinking water quality

105 active public water systems serve 130,495 people in Cochise County. 19 are compliant, 86 had at least one EPA violation in the past three years, 7 are designated serious violators, and 7 carry a health flag.

Active systems 105 53 community systems
People served 130K by public water systems
Systems with violations 86 82% of active systems, past 3 years
Serious violators 7 7 systems carry a health flag

Needs attention

Pomerene Dwid AZ0402012 · Pomerene · Community water system · Serves 1,618 5 rules violated in the past three years
Tombstone City of AZ0402033 · Tombstone · Community water system · Serves 1,545 4 rules violated in the past three years. Unresolved: Public Notice Rule and Revised PN Rule.
San Simon Dwid AZ0402027 · San Simon · Community water system · Serves 312 6 rules violated in the past three years. Unresolved: Public Notice Rule and Revised PN Rule and Consumer Confidence Rule.
Western Refining Speedway 2962 AZ0402128 · Sierra Vista · Transient non-community system · Serves 162 2 rules violated in the past three years. Unresolved: Revised Total Coliform Rule and Public Notice Rule and Revised PN Rule.
Double Adobe School AZ0402076 · Double Adobe · Non-Transient non-community system · Serves 63 6 rules violated in the past three years. Unresolved: Public Notice Rule and Revised PN Rule.
The Brite Spot AZ0402392 · Palominas · Transient non-community system · Serves 57 2 rules violated in the past three years. Unresolved: Revised Total Coliform Rule and Public Notice Rule and Revised PN Rule.
Tombstone Investors, LLC AZ0402413 · Tombstone · Transient non-community system · Serves 50 3 rules violated in the past three years. Unresolved: Revised Total Coliform Rule and Public Notice Rule and Revised PN Rule.
Naco Water CO Main AZ0402024 · Naco · Community water system · Serves 658 1 rule violated in the past three years. Unresolved: Revised Total Coliform Rule.
Coronado Elementary AZ0402102 · Coranado School · Non-Transient non-community system · Serves 446 1 rule violated in the past three years. Unresolved: Revised Total Coliform Rule.
Monte Vista Water Company AZ0402043 · Douglas · Community water system · Serves 150 8 rules violated in the past three years. Unresolved: Revised Total Coliform Rule.

1 more systems with a serious violator or health flag designation are in the lists below.

Community water systems

53 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Desert Winds Mobile Park
Huachuca City 		34 5 1
LA Costa Water Users Assoc
Douglas 		30 2 1
Palominas Water Sewer CO
Palominas 		27 0 0
Non-community systems (52: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Adot San Simon Rest Area
San Simon 		2,500 0 0
Cochise County Community College Distric
Douglas 		1,120 0 0
Adot Texas Canyon Rest Area
Texas Canyon 		1,006 0 0
Apple Annies Orchard
Willcox 		675 3 1
Aspb Kartchner Caverns
Benson 		483 3 0
Douglas Border Patrol Station
Douglas 		450 3 0
Coronado Elementary
Coranado School 		446 1 1
Palominas Elementary
Palominas 		421 3 0
Fiesta Canning CO INC
Mcneal 		300 1 0
Valley View Elementary
Hereford 		231 2 0
Chiricahua Natl Monument Bonita CG
Willcox 		200 1 0
Fort Bowie National Historic Site
Bowie 		200 1 0
Mountain View RV Park
Huachuca City 		200 0 0
Adot San Simon Port of Entry
San Simon 		175 0 0
Western Refining Speedway 2962
Sierra Vista 		162 2 2
Quail Ridge RV Park
Fairbank 		144 1 0
The Pharm
Willcox 		140 3 0
Amerind Foundation
Dragoon 		135 1 0
Coronado Memorial
Sierra Vista 		135 2 0
Benson Arizona KOA Kampground
Benson 		120 0 0
Cochise Elementary School
Willcox 		105 1 0
AZ Electric Power Apache
Willcox 		100 2 0
Bowie Travel Center
Bowie 		100 1 0
Pearce Elementary School
Pearce 		100 3 0
Valley Union High School
Elfrida 		100 4 0
Red Barn Campground
Benson 		98 0 0
Usfs Cnf Cave Creek
Portal 		90 0 0
Double Adobe RV Park
Double Adobe 		82 1 0
Apache Nitrogen Products
St David 		70 0 0
Double Adobe School
Double Adobe 		63 6 1
Desert Oasis Campground
Mcneal 		60 3 0
Blm San Pedro House
Sierra Vista 		58 4 0
Johnson Camp Mine Water
Dragoon 		58 1 0
The Brite Spot
Palominas 		57 2 2
Holy Trinity Monastery
St David 		55 0 0
Parker Lakeview Estates
Parker Canyon Lake 		54 2 0
Ash Creek Elementary School
Sunizona 		50 3 0
Dairy Queen
Sierra Vista 		50 1 0
Fort Willcox RV Park
Willcox 		50 2 0
Morning Star Cafe
Hereford 		50 1 0
Sierra Vista Airport
Sierra Vista 		50 1 1
Tombstone Investors, LLC
Tombstone 		50 3 2
Tombstone Territories RV
Huachuca City 		45 1 1
Usfs Cnf Douglas Ranger Station
Douglas 		45 2 0
Portal Store
Portal 		40 1 0
Southwestern Research Station
Portal 		40 3 0
McNeal Elementary School
Mcneal 		38 3 0
High Low RV Park
Benson 		30 0 0
Usfs Cnf Lake View
Parker 		30 1 0
Chevron Freeway
Willcox 		25 1 0
The Nature Conservancy
Ramsey Canyon 		25 1 1
Diamond Mountain Retreat
Bowie 		23 1 1
Inactive systems (83, 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.