Tap Truth EPA drinking water records, in plain English

County drinking water records

Pima County, AZ drinking water systems

148 community water systems serve Pima County, AZ, reporting 1,090,747 people served in all. A system that also serves other counties counts all of its customers here.

35 of them (24%) had at least one health-based violation in the last 10 years. 36 systems still have one unresolved.

148 rely mainly on groundwater, counting water bought from other systems.

142 systems filed a lead service line inventory listing 0 lead lines, 416 galvanized lines that must be replaced and 164,085 lines of unknown material.

18 more systems are placed in Pima County, AZ by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.

Community water systems
148
People served, sum of each system's own figure
1,090,747
Systems with a health-based violation, last 10 years
35
Systems with one unresolved
36
Lead service lines in inventories
0

Water systems serving Pima County

148 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
City of Tucson Tucson, Catalina Foothills and 10 more 732,906 Groundwater 0 0 0
Metropolitan DWID Casas Adobes, Oro Valley and 1 more 45,570 Groundwater 0 1 No inventory
Oro Valley Water Utility Oro Valley 42,316 Groundwater 0 0 0
Community WC of Green Valley Green Valley and Sahuarita 22,085 Groundwater 0 0 0
Usaf Davis Monthan AFB Tucson 18,640 Groundwater 0 0 No inventory
Sahuarita Water Company Sahuarita 18,178 Groundwater 0 0 0
Lago Del Oro Water Company Catalina and Saddlebrooke 18,132 Groundwater 0 0 0
Vail Water Company Vail and Tucson 17,500 Groundwater 0 0 0
Flowing Wells Irrigation District Tucson and Flowing Wells 16,000 Groundwater 1 0 No inventory
Marana Municipal - Marana Marana 15,162 Groundwater 0 0 0
Tucson Water Corona De Tucson Corona de Tucson and Tucson 10,217 Groundwater 0 0 0
Green Valley DWID Green Valley and Elephant Head 8,687 Groundwater 0 0 0
Quail Creek Water Company Sahuarita and Green Valley 6,812 Groundwater 0 0 0
Avra Water Coop Inc Picture Rocks and Tucson 6,685 Groundwater 0 0 0
GW Farmers Water Co - Continental Green Valley and Sahuarita 5,592 Groundwater 0 0 0
Metropolitan DWID - Diablo Village Valencia West and Tucson 5,542 Groundwater 0 0 0
Marana Municipal - Picture Rocks Tucson Mountains and Marana 5,278 Groundwater 0 0 0
Marana Municipal - Hartman Vistas Marana and Casas Adobes 5,248 Groundwater 0 0 0
Marana Municipal - Airline Lambert Marana 4,568 Groundwater 0 0 0
Oro Valley Water Countryside Marana and Oro Valley and land outside them 4,534 Groundwater 0 0 0
Adoc Tucson Tucson 4,500 Groundwater 1 1 0
Ray Water Company Inc Tucson and land outside it 4,495 Groundwater 0 0 0
Metropolitan DWID - Hub Catalina Foothills and Tucson 4,252 Groundwater 0 0 0
Sells Intertie Sells 4,000 Groundwater 0 0 0
GW Farmers Water Co - Santa Rita Springs Green Valley and Sahuarita 3,990 Groundwater 0 0 0
Spanish Trail Water Company Rincon Valley and Tucson 3,822 Groundwater 0 0 0
GW Saguaro Dist Water Co - Las Quintas Sahuarita and Green Valley 3,720 Groundwater 0 1 0
Saguaro Water Company Rincon Valley and Vail 3,243 Groundwater 0 0 0
Voyager Water Company Tucson and land outside it 3,209 Groundwater 0 0 0
GW Ocotillo Water - Rancho Del Sol Lindo Avra Valley 3,128 Groundwater 0 0 0
Ajo Improvement Company Ajo and land outside it 2,654 Groundwater 0 0 0
CS Los Cerros Water Company Inc Catalina 2,613 Groundwater 0 0 0
Arizona Water Co - Ajo Ajo and land outside it 2,100 Purchased groundwater 0 0 0
Marana DWID - Derringer Avra Valley and Marana 1,950 Groundwater 2 0 No inventory
Topawa Intertie Topawa 1,318 Groundwater 0 0 0
GW Ocotillo Water - Catalina Catalina 1,168 Groundwater 0 0 0
Vaya Chin Intertie Ajo 1,151 Groundwater 0 0 0
Mission View Mobile Home Park (Tucson Water Consec Tucson and land outside it 1,125 Purchased groundwater 0 0 0
Rincon Country East RV Park Tucson 912 Groundwater 0 0 0
Rancho Del Conejo Comm Water Coop Picture Rocks and Avra Valley 900 Groundwater 2 0 0
Metropolitan DWID - E&T System Three Points and Tucson 880 Groundwater 0 0 0
Sandario Water Company Picture Rocks and Tucson and land outside them 870 Groundwater 0 1 0
Far Horizons East MHP Tucson 870 Groundwater 0 0 0
Organ Pipe NM Headquarters Outside cities and towns 755 Groundwater 0 0 0
Lakewood Estates Water Company Arivaca Junction and Tucson 722 Groundwater 2 0 0
Mission Palms Apartments Casas Adobes and Tucson 720 Groundwater 0 0 0
Marana DWID - Culver Avra Valley and Marana 709 Groundwater 3 2 No inventory
GW Ocotillo Water - Diamond Bell Three Points and Tucson 706 Groundwater 0 0 0
Winterhaven Water Development Tucson 685 Groundwater 0 0 0
La Casita Water Company 3 Summit and Tucson 605 Groundwater 0 0 0
Anway Manville Water Company Picture Rocks and Avra Valley 576 Groundwater 0 1 0
Vista Del Norte MHP Tucson 554 Groundwater 0 0 0
Trails West MHP Tucson and land outside it 500 Purchased groundwater 0 0 0
GW Ocotillo Water - Valley View Acres Three Points 496 Groundwater 0 0 0
GW Farmers Water Co - Sahuarita Sahuarita and Green Valley 492 Groundwater 0 0 0
GW Farmers Water Co - Sahuarita Highland Sahuarita and land outside it 492 Groundwater 1 0 0
Pisinemo Intertie Pisinemo 472 Groundwater 0 0 0
Campbell Estates MHP Tucson 450 Groundwater 0 0 0
Thim Utility Company 2 Three Points and Tucson 445 Groundwater 0 0 0
Cactus Country RV Resort Tucson and land outside it 420 Groundwater 1 1 0
Ajo DWID Ajo 405 Purchased groundwater 0 0 0
Why DWID Why 400 Groundwater 10 0 0
San Xavier Ord (East) Summit 390 Groundwater 0 0 0
Diamond Grove Mobile Home Estates Flowing Wells and Tucson 385 Groundwater 0 0 0
Lazy C Water Service Tucson Mountains and Tucson 359 Groundwater 0 0 0
Federal Correctional Inst Tucson 350 Groundwater 2 0 0
Bella Capri MHP Flowing Wells and Tucson 342 Groundwater 1 0 0
Little Tucson Ali Chukson and Ali Molina 328 Groundwater 0 0 0
Thim Utility Company Three Points 310 Groundwater 0 0 0
Shiloh Water Company Sahuarita and land outside it 309 Groundwater 0 0 0
Los Arboles Mobile Home Park Sahuarita 303 Groundwater 0 0 0
Valle Verde Del Norte Sahuarita and Green Valley 300 Groundwater 0 1 0
Mesaland Water Company Casas Adobes and Tucson 294 Groundwater 0 1 0
Mt Lemmon DWID Summerhaven 290 Groundwater 0 1 0
Rio Viejo Water Tucson 272 Groundwater 0 0 0
Tierra Linda HOA Water Company Picture Rocks and Tucson 266 Groundwater 1 0 0
GW Ocotillo Water - Silverbell West Nelson and Tucson 263 Groundwater 0 0 0
La Casita Water Company 2 Summit and Tucson 261 Groundwater 0 1 0
Sierrita Mountain Water Coop Three Points and Tucson 258 Groundwater 0 2 0
Far Horizons MHP Tucson 258 Groundwater 0 0 0
GW Saguaro Dist Water Co - Tala Way Three Points and Tucson 255 Groundwater 0 0 0
Thim Utility Company - Well 9 Three Points 254 Groundwater 0 0 0
La Cholla Airpark Oro Valley and Tucson 250 Purchased groundwater 0 0 0
Thim Water Company 2 Three Points and Tucson 247 Groundwater 0 0 0
Comobabi Intertie Three Points and Comobabi 240 Groundwater 1 0 0
GW Saguaro Dist Water Co - Rincon Rincon Valley and Tucson and land outside them 232 Groundwater 17 0 0
Ranchwood Community Tucson and land outside it 225 Groundwater 0 0 0
Desert Shores RV MHP Tucson 220 Groundwater 1 1 0
Rio Vista Mobile Home Park Tucson 217 Groundwater 1 0 0
Halcyon Acres Water Users Association Tucson 215 Groundwater 0 0 0
Crescent Manor MHP Tucson 200 Groundwater 0 0 0
GW Saguaro Dist Water Co - Mirabell Three Points and Tucson 180 Groundwater 0 0 0
GW Ocotillo Water - Thunderhead Rincon Valley and Tucson 174 Groundwater 0 0 0
La Casita Water Company 1 Summit and Tucson 174 Groundwater 0 1 0
Silver Cholla LLC Flowing Wells and Tucson 168 Groundwater 0 0 0
Casitas De Castilian Casas Adobes and Tucson 167 Groundwater 1 1 0
Santa Rosa Ranch Intertie Three Points 165 Groundwater 0 0 0
Rillito Water Users Assoc Marana and Rillito 165 Groundwater 1 1 0
Halcyon Acres 2 Tucson 164 Groundwater 0 0 0
Wildflower Water Coop Three Points 157 Groundwater 0 0 0
Pantano Water Coop Rincon Valley and Vail 156 Groundwater 1 2 0
Via Verde West MHP Tucson and land outside it 156 Groundwater 1 1 0
Arivaca Townsite Water Coop Arivaca 150 Groundwater 0 0 0
Samalayuca Improvement Assoc Casas Adobes and Tucson 150 Groundwater 0 1 0
Desert Water Coop Three Points and Tucson 150 Groundwater 1 0 0
North La Cholla MHP Flowing Wells and Tucson 150 Groundwater 0 0 0
Raindance Water Coop Three Points and Tucson 148 Groundwater 0 0 0
Orchard Valley Mobile Home Park Catalina 130 Groundwater 0 1 0
Rancho Tierra Blanca POA Picture Rocks and Marana 126 Groundwater 0 0 0
Marana Municipal - Palo Verde Picture Rocks and Marana 118 Groundwater 0 0 0
GW Saguaro Dist Water Co - Lyn Lee Marana 114 Groundwater 0 0 0
Mobile Home Properties Summit and Sahuarita 114 Groundwater 0 1 0
GW Saguaro Dist Water Co - Amber Ann Three Points 108 Groundwater 0 1 0
Catalina Village Tucson 107 Groundwater 0 2 0
Thim Utility Company - Rancho Vista Three Points and Tucson 105 Groundwater 0 0 0
Crossroads Park MHP Tucson 100 Groundwater 1 1 0
Kahlua Well Coop Rincon Valley and Vail 99 Groundwater 1 0 0
Sahuarita Village Water Company Sahuarita 93 Purchased groundwater 3 1 0
Desert Paradise MHP LLC Outside cities and towns 90 Groundwater 1 1 0
GW Ocotillo Water - Sierrita Foothills Three Points and Sahuarita 84 Groundwater 0 0 0
Wells Fargo Water Company Three Points and Tucson 83 Groundwater 0 1 0
Metropolitan DWID - Lazy B Tucson Estates and Tucson 77 Groundwater 0 0 0
Catalina Country Estates Catalina and Tucson 77 Groundwater 0 1 0
Rincon Mesa Landowners Rincon Valley and Tucson 75 Groundwater 1 1 No inventory
Lazy Acres MHP Summit and Sahuarita 75 Groundwater 0 1 0
High Chaparral Water Coop Three Points and Tucson 72 Groundwater 1 0 0
Carolanne Drive HOA Casas Adobes and Tucson 72 Groundwater 1 0 No inventory
Charco 27 Ajo 70 Groundwater 0 0 0
GW Saguaro Dist Water Co - Tortolita Marana and Tucson 69 Groundwater 0 0 0
Pocketknife Water Coop Rincon Valley and Vail 65 Groundwater 0 0 0
Queens Well Three Points 64 Groundwater 0 0 0
Cammies Foothills Vista MHC Tucson 62 Groundwater 0 0 0
Worden Water Company Three Points 60 Groundwater 0 1 0
Rancho Sierrita Well Assoc Three Points and Tucson 55 Groundwater 1 1 0
Pita Water Company Arivaca Junction 54 Groundwater 2 0 0
Summit Water Coop Summit and Tucson 53 Groundwater 0 0 0
Wildcat One Well Coop Rincon Valley and Vail 52 Groundwater 1 0 0
Sierra Court MHC LLC Tucson 51 Groundwater 0 1 0
Santa Rita Heights MHP Sahuarita and land outside it 50 Groundwater 2 1 0
Pico Vista Community Well Tucson and land outside it 49 Groundwater 0 0 0
Superstition Water Coop Rincon Valley and Vail 45 Groundwater 0 0 0
Klafter Well Coop Tucson and land outside it 45 Groundwater 0 0 0
Sasabe Border Village Outside cities and towns 42 Groundwater 0 1 0
Garigans Gulch Water Coop Rincon Valley and Vail 35 Groundwater 0 0 0
Wilmot Water Users Group Tucson and land outside it 30 Groundwater 1 0 0
Coronado Forest Drive Water Coop Catalina 30 Groundwater 1 0 0
Gator Water Company Tucson and land outside it 29 Groundwater 1 1 0
Siete Casas Joint Venture Casas Adobes and Tucson 25 Groundwater 0 0 0

Systems placed by county record in Pima County

18 systems

EPA has no service area map for some of these systems, and the maps it has for the others do not line up with their own records. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
San Xavier West County on record 1,511 Groundwater 0 0 0
Greater Santa Rosa Regional County on record 1,352 Groundwater 0 0 0
Town & Country Estates County on record 960 Groundwater 1 1 0
Marana Municipal - Silverbell Gateway County on record 750 Purchased groundwater 0 0 0
Covered Wells Regional County on record 740 Groundwater 0 1 0
Rio Mercado Water County on record 266 Groundwater 1 1 0
Kerwo Intertie County on record 233 Groundwater 0 0 0
Marana Municipal - Tortolita Mountain County on record 200 Purchased groundwater 0 0 No inventory
San Pedro County on record 135 Groundwater 0 0 0
Vamori County on record 125 Groundwater 0 0 0
Cowlic County on record 120 Groundwater 0 0 0
Fresnal County on record 105 Groundwater 0 0 0
Ventana County on record 80 Groundwater 0 0 0
Riverside Apartments County on record 75 Groundwater 1 0 No inventory
Thim Utility Company - Parkin County on record 69 Groundwater 1 0 No inventory
New Fields County on record 67 Groundwater 0 0 0
Shae Water Company County on record 54 Groundwater 0 1 0
Gunsight (Schuchuligk) County on record 40 Groundwater 0 1 0

Cities and towns in Pima County

39 places

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Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations