County · Arizona
Pima County, Arizona: drinking water records
Explore EPA records for 165 community water systems across 51 ZIP codes in Pima County, then find water-testing resources and available recent monitoring-station readings.
Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages
Drinking-water records
EPA survey and compliance records are historical reports. UCMR 5 results are available for 27 of the 165 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems in this county
All 165 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Flowing Wells Irrigation District AZ0410051 | 16,000 | 360 | 6 | 1 | 0 ppbbelow the action level |
| Adoc Tucson AZ0420557 | 4,500 | 60 | 0 | 1 | 0 ppbbelow the action level |
| Tucson City of AZ0410112 | 732,906 | 4,856 | 1 | 0 | 0.6 ppbbelow the action level |
| Metropolitan Dwid AZ0410076 | 45,570 | 1,260 | 2 | 0 | 0.6 ppbbelow the action level |
| Oro Valley Water Utility AZ0410164 | 42,316 | 815 | 0 | 0 | 1 ppbbelow the action level |
| Community Wc of Green Valley AZ0410004 | 22,085 | 240 | 0 | 0 | 0 ppbbelow the action level |
| USAF Davis Monthan Afb AZ0420549 | 18,640 | 300 | 0 | 0 | 0 ppbbelow the action level |
| Sahuarita Water Company AZ0410312 | 18,178 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Vail Water Company AZ0410041 | 17,500 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Marana Municipal - Marana AZ0410150 | 15,162 | 120 | 6 | 0 | 0 ppbbelow the action level |
| Tucson Water Corona de Tucson AZ0410169 | 10,217 | 180 | 0 | 0 | 0.8 ppbbelow the action level |
| Green Valley Dwid AZ0410157 | 8,687 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Quail Creek Water Company AZ0410262 | 6,812 | 60 | 0 | 0 | 0 ppbbelow the action level |
| Avra Water Coop INC AZ0410006 | 6,685 | 120 | 0 | 0 | 0 ppbbelow the action level |
| Gw Farmers Water Co - Continental AZ0410049 | 5,592 | 180 | 0 | 0 | 0 ppbbelow the action level |
| Metropolitan Dwid - Diablo Village AZ0410357 | 5,542 | 120 | 0 | 0 | 0 ppbbelow the action level |
| Marana Municipal - Picture Rocks AZ0410092 | 5,278 | 60 | 4 | 0 | 0 ppbbelow the action level |
| Marana Municipal - Hartman Vistas AZ0410329 | 5,248 | 180 | 2 | 0 | 0 ppbbelow the action level |
| Oro Valley Water Countryside AZ0410175 | 4,534 | 60 | 0 | 0 | 0.5 ppbbelow the action level |
| Ray Water Company INC AZ0410095 | 4,495 | 180 | 0 | 0 | 0 ppbbelow the action level |
| Metropolitan Dwid - Hub AZ0410060 | 4,252 | 300 | 0 | 0 | 2.6 ppbbelow the action level |
| Sells Intertie 090400042 | 4,000 | 60 | 0 | 0 | 0.5 ppbbelow the action level |
| Gw Farmers Water Co - Santa Rita Springs AZ0410213 | 3,990 | 60 | 3 | 0 | 0 ppbbelow the action level |
| Spanish Trail Water Company AZ0410127 | 3,822 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Gw Saguaro Dist Water Co - Las Quintas AZ0410064 | 3,720 | 120 | 0 | 0 | 0.5 ppbbelow the action level |
| Voyager Water Company AZ0410035 | 3,209 | 150 | 0 | 0 | 0 ppbbelow the action level |
| Marana Dwid - Derringer AZ0410139 | 1,950 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Vaya Chin Intertie 090400020 | 1,151 | 120 | 0 | 0 | 0.5 ppbbelow the action level |
| Town & Country Estates AZ0420109 | 960 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Rancho del Conejo Comm Water Coop AZ0410142 | 900 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Lakewood Estates Water Company AZ0410063 | 722 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Mission Palms Apartments AZ0420570 | 720 | 60 | 0 | 0 | 7.9 ppbbelow the action level |
| Marana Dwid - Culver AZ0410070 | 709 | 0 | 0 | 3 | 0 ppbbelow the action level |
| Gw Farmers Water Co - Sahuarita Highland AZ0410414 | 492 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Cactus Country RV Resort AZ0420197 | 420 | 0 | 0 | 1 | 3.2 ppbbelow the action level |
| Why Dwid AZ0410118 | 400 | 0 | 0 | 9 | 0 ppbbelow the action level |
| Federal Correctional Inst AZ0410187 | 350 | 0 | 0 | 3 | 0 ppbbelow the action level |
| Bella Capri MHP AZ0420445 | 342 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Rio Mercado Water AZ0410968 | 266 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Tierra Linda HOA Water Company AZ0410411 | 266 | 0 | 0 | 1 | 8 ppbbelow the action level |
| Comobabi Intertie 090400220 | 240 | 0 | 0 | 1 | 0.7 ppbbelow the action level |
| Gw Saguaro Dist Water Co - Rincon AZ0410144 | 232 | 0 | 0 | 17 | 1.6 ppbbelow the action level |
| Desert Shores RV MHP AZ0420033 | 220 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Rio Vista Mobile Home Park AZ0420487 | 217 | 0 | 0 | 1 | 1.4 ppbbelow the action level |
| Casitas de Castilian AZ0420531 | 167 | 0 | 0 | 1 | 0.5 ppbbelow the action level |
| Rillito Water Users Assoc AZ0410098 | 165 | 0 | 0 | 1 | 12 ppbbelow the action level |
| Halcyon Acres 2 AZ0410058 | 164 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Pantano Water Coop AZ0410281 | 156 | 0 | 0 | 1 | 8 ppbbelow the action level |
| Via Verde West MHP AZ0420420 | 156 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Desert Water Coop AZ0410188 | 150 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Crossroads Park MHP AZ0420096 | 100 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Kahlua Well Coop AZ0410405 | 99 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Sahuarita Village Water Company AZ0410123 | 93 | 0 | 0 | 3 | 0.3 ppbbelow the action level |
| Desert Paradise MHP LLC AZ0420546 | 90 | 0 | 0 | 1 | 2.1 ppbbelow the action level |
| Rincon Mesa Landowners AZ0410199 | 75 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Riverside Apartments AZ0420129 | 75 | 0 | 0 | 1 | 2 ppbbelow the action level |
| Carolanne Drive HOA AZ0420529 | 72 | 0 | 0 | 1 | 0 ppbbelow the action level |
| High Chaparral Water Coop AZ0410282 | 72 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Thim Utility Company - Parkin AZ0410250 | 69 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Rancho Sierrita Well Assoc AZ0410286 | 55 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Pita Water Company AZ0420600 | 54 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Wildcat One Well Coop AZ0410810 | 52 | 0 | 0 | 1 | 0.4 ppbbelow the action level |
| Santa Rita Heights MHP AZ0420419 | 50 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Coronado Forest Drive Water Coop AZ0420475 | 30 | 0 | 0 | 1 | 1.3 ppbbelow the action level |
| Wilmot Water Users Group AZ0410402 | 30 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Gator Water Company AZ0410445 | 29 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Siete Casas Joint Venture AZ0410242 | 25 | 0 | 0 | 2 | 0.3 ppbbelow the action level |
| Marana Municipal - Airline Lambert AZ0410138 | 4,568 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Saguaro Water Company AZ0410177 | 3,243 | 0 | 0 | 0 | 8.1 ppbbelow the action level |
| Gw Ocotillo Water - Rancho del Sol Lindo AZ0410173 | 3,128 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Ajo Improvement Company AZ0410001 | 2,654 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| Cs Los Cerros Water Company INC AZ0410128 | 2,613 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Arizona Water Co - Ajo AZ0410003 | 2,100 | 0 | 0 | 0 | 0 ppbbelow the action level |
| San Xavier West 090400035 | 1,511 | 0 | 0 | 0 | 0.9 ppbbelow the action level |
| Greater Santa Rosa Regional 090400226 | 1,352 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Topawa Intertie 090400001 | 1,318 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Gw Ocotillo Water - Catalina AZ0410171 | 1,168 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Mission View Mobile Home Park (Tucson Water Consec 090400228 | 1,125 | 0 | 0 | 0 | 1.1 ppbbelow the action level |
| Rincon Country East RV Park AZ0420602 | 912 | 0 | 0 | 0 | 27 ppbat or above the action level |
| Metropolitan Dwid - E&t System AZ0410046 | 880 | 0 | 0 | 0 | 1.9 ppbbelow the action level |
| Far Horizons East MHP AZ0420443 | 870 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sandario Water Company AZ0410093 | 870 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Organ Pipe Nm Headquarters AZ0410701 | 755 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Marana Municipal - Silverbell Gateway AZ0410501 | 750 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Covered Wells Regional 090400006 | 740 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Gw Ocotillo Water - Diamond Bell AZ0410159 | 706 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Winterhaven Water Development AZ0410119 | 685 | 0 | 0 | 0 | 0 ppbbelow the action level |
| La Casita Water Company 3 AZ0420606 | 605 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Anway Manville Water Company AZ0410354 | 576 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Vista del Norte MHP AZ0420439 | 554 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Trails West MHP AZ0410408 | 500 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gw Ocotillo Water - Valley View Acres AZ0410158 | 496 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gw Farmers Water Co - Sahuarita AZ0410048 | 492 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Pisinemo Intertie 090400030 | 472 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Campbell Estates MHP AZ0420019 | 450 | 0 | 0 | 0 | 2 ppbbelow the action level |
| Thim Utility Company 2 AZ0410228 | 445 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Kerwo Intertie 090400041 | 441 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Ajo Dwid AZ0410153 | 405 | 0 | 0 | 0 | 2 ppbbelow the action level |
| San Xavier Ord (East) 090400227 | 390 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Diamond Grove Mobile Home Estates AZ0420542 | 385 | 0 | 0 | 0 | 3 ppbbelow the action level |
| Lazy C Water Service AZ0410065 | 359 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Little Tucson 090400040 | 328 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Thim Utility Company AZ0410117 | 310 | 0 | 0 | 0 | 3.6 ppbbelow the action level |
| Shiloh Water Company AZ0410450 | 309 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Los Arboles Mobile Home Park AZ0420175 | 303 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Valle Verde del Norte AZ0410152 | 300 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Mesaland Water Company AZ0410074 | 294 | 0 | 0 | 0 | 1.8 ppbbelow the action level |
| Mt Lemmon Dwid AZ0410140 | 290 | 0 | 0 | 0 | 5.7 ppbbelow the action level |
| Rio Viejo Water AZ0410011 | 272 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gw Ocotillo Water - Silverbell West AZ0410162 | 263 | 0 | 0 | 0 | 0 ppbbelow the action level |
| La Casita Water Company 2 AZ0410410 | 261 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Far Horizons MHP AZ0420042 | 258 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sierrita Mountain Water Coop AZ0410208 | 258 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gw Saguaro Dist Water Co - Tala Way AZ0410283 | 255 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Thim Utility Company - Well 9 AZ0410206 | 254 | 0 | 0 | 0 | 3 ppbbelow the action level |
| La Cholla Airpark AZ0420597 | 250 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Thim Water Company 2 AZ0410264 | 247 | 0 | 0 | 0 | 11 ppbbelow the action level |
| Ranchwood Community AZ0420205 | 225 | 0 | 0 | 0 | 4.1 ppbbelow the action level |
| Halcyon Acres Water Users Association AZ0410057 | 215 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Crescent Manor MHP AZ0420026 | 200 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Marana Municipal - Tortolita Mountain AZ0410505 | 200 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gw Saguaro Dist Water Co - Mirabell AZ0410178 | 180 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gw Ocotillo Water - Thunderhead AZ0410179 | 174 | 0 | 0 | 0 | 0 ppbbelow the action level |
| La Casita Water Company 1 AZ0410409 | 174 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Silver Cholla LLC AZ0420478 | 168 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Santa Rosa Ranch Intertie 090400018 | 165 | 0 | 0 | 0 | 1.8 ppbbelow the action level |
| Wildflower Water Coop AZ0410265 | 157 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Arivaca Townsite Water Coop AZ0410002 | 150 | 0 | 0 | 0 | 0 ppbbelow the action level |
| North la Cholla MHP AZ0420043 | 150 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Samalayuca Improvement Assoc AZ0410101 | 150 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Raindance Water Coop AZ0410278 | 148 | 0 | 0 | 0 | 0 ppbbelow the action level |
| San Pedro 090400036 | 135 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Orchard Valley Mobile Home Park AZ0420159 | 130 | 0 | 0 | 0 | 4.5 ppbbelow the action level |
| Rancho Tierra Blanca Poa AZ0410272 | 126 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Vamori 090400038 | 125 | 0 | 0 | 0 | 1.4 ppbbelow the action level |
| Cowlic 090400029 | 120 | 0 | 0 | 0 | 8.3 ppbbelow the action level |
| Marana Municipal - Palo Verde AZ0410136 | 118 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gw Saguaro Dist Water Co - Lyn Lee AZ0410007 | 114 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Mobile Home Properties AZ0410319 | 114 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gw Saguaro Dist Water Co - Amber Ann AZ0410317 | 108 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Catalina Village AZ0410219 | 107 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Fresnal 090400004 | 105 | 0 | 0 | 0 | 2.2 ppbbelow the action level |
| Thim Utility Company - Rancho Vista AZ0410351 | 105 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gw Ocotillo Water - Sierrita Foothills AZ0410270 | 84 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Wells Fargo Water Company AZ0410269 | 83 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Catalina Country Estates AZ0420500 | 77 | 0 | 0 | 0 | 1 ppbbelow the action level |
| Metropolitan Dwid - Lazy B AZ0410218 | 77 | 0 | 0 | 0 | 0.4 ppbbelow the action level |
| Lazy Acres MHP AZ0420176 | 75 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Charco 27 090400008 | 70 | 0 | 0 | 0 | 1.4 ppbbelow the action level |
| Gw Saguaro Dist Water Co - Tortolita AZ0410154 | 69 | 0 | 0 | 0 | 0 ppbbelow the action level |
| New Fields 090400019 | 67 | 0 | 0 | 0 | 7.1 ppbbelow the action level |
| Pocketknife Water Coop AZ0410008 | 65 | 0 | 0 | 0 | 0.3 ppbbelow the action level |
| Queens Well 090400005 | 64 | 0 | 0 | 0 | 0.9 ppbbelow the action level |
| Cammies Foothills Vista MHC AZ0420575 | 62 | 0 | 0 | 0 | 1.3 ppbbelow the action level |
| Worden Water Company AZ0410132 | 60 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Shae Water Company AZ0410268 | 54 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Summit Water Coop AZ0420595 | 53 | 0 | 0 | 0 | 7 ppbbelow the action level |
| Sierra Court MHC LLC AZ0420092 | 51 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Pico Vista Community Well AZ0410435 | 49 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Klafter Well Coop AZ0410400 | 45 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Superstition Water Coop AZ0410311 | 45 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sasabe Border Village AZ0410047 | 42 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gunsight (Schuchuligk) 090400032 | 40 | 0 | 0 | 0 | 0.9 ppbbelow the action level |
| Garigans Gulch Water Coop AZ0410481 | 35 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Ventana 090400027 | 80 | 0 | 0 | 0 | not reported |
Shaded rows report lead at or above the 15 ppb action level in their latest monitoring period. EPA sets that level for the value 9 in 10 sampled homes fall at or below; reaching it requires the utility to act, and it is not a measurement of any single tap. One system in this table is at or above it. What an action level means
USGS · Monitoring stations
The water, more recently.
Available station readings in Pima County, Arizona. Each measurement keeps its time, unit and original source.
These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.
Recent observations load when this section comes into view.
How these readings update
We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.
Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.
Your next step
Water testing, reports & local help.
Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.
Official national directories
Water testing
Find your state’s private-well program
EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.
Water testing
Find a certified drinking-water laboratory
Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.
Public records
Find your utility’s Consumer Confidence Report
EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.
Public records
Explore USGS water observations
Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.
A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.
Understand water testing and laboratory reportsResource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction
Explore your area
Local coverage in Pima County
51ZIP areas in this overview
Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.
Towns and communities
- Ajo
- Arivaca
- Casas Adobes
- Catalina Foothills
- Drexel Heights
- Elephant Head
- Green Valley
- Marana
- Oro Valley
- Picture Rocks
- Rillito
- Sahuarita
- Sells
- Summerhaven
- Tanque Verde
- Three Points
- Topawa
- Tucson
- Tucson Mountains
- Vail
- Valencia West
View ZIP areas and understand coverage
- 85321Ajo
- 85341
- 85601Arivaca
- 85614Green Valley
- 85619Summerhaven
- 85622Green Valley
- 85629Sahuarita
- 85633
- 85634Sells
- 85639Topawa
- 85641Vail
- 85645Elephant Head
- 85653Marana
- 85654Rillito
- 85701Tucson
- 85704Casas Adobes
- 85705Tucson
- 85706Tucson
- 85707Tucson
- 85708Tucson
- 85709Tucson
- 85710Tucson
- 85711Tucson
- 85712Tucson
- 85713Tucson
- 85714Tucson
- 85715Tucson
- 85716Tucson
- 85718Catalina Foothills
- 85719Tucson
- 85721Tucson
- 85723Tucson
- 85724Tucson
- 85726Tucson
- 85730Tucson
- 85734Tucson
- 85735Three Points
- 85736Three Points
- 85737Oro Valley
- 85741Casas Adobes
- 85742Casas Adobes
- 85743Picture Rocks
- 85745Tucson Mountains
- 85746Drexel Heights
- 85747Tucson
- 85748Tucson
- 85749Tanque Verde
- 85750Catalina Foothills
- 85755Oro Valley
- 85756Tucson
- 85757Valencia West
These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.
Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.
Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.