| Granite Oaks Water Users Association | Prescott, AZ | 1,200 | 137 | - |
| Mammoth Town Of | Mammoth, AZ | 1,181 | 153 | - |
| Tonto Basin Water - Lr Gardens West | Payson, AZ | 1,172 | 356 | - |
| Gw Santa Cruz Water - Maricopa SW | Maricopa, AZ | 1,170 | 2 | - |
| Gw Ocotillo Water - Catalina | Maricopa, AZ | 1,168 | 25 | - |
| Town of Star Valley Water Department | Payson, AZ | 1,157 | 324 | - |
| Watco Water | Tucson, AZ | 1,153 | 79 | - |
| Adot Airport Grand Canyon | Phoenix, AZ | 1,140 | 317 | - |
| Bradshaw Mountain View Water | Mayer, AZ | 1,127 | 158 | - |
| Livco Water Company | Glendale, AZ | 1,120 | 136 | - |
| Cochise County Community College Distric | Sierra Vista, AZ | 1,120 | 200 | - |
| Baca Float Water Company | Glendale, AZ | 1,090 | 78 | - |
| Copper Mountain Ranch Cfd | Casa Grande, AZ | 1,071 | 370 | Clean |
| Beaver Dam WC System 1 | Littlefield, AZ | 1,048 | 92 | - |
| Alpine Dwid | Alpine, AZ | 1,030 | 64 | - |
| Pomerene Dwid | Pomerene, AZ | 1,030 | 337 | - |
| Adot Bouse Wash Rest Area | Phoenix, AZ | 1,026 | 36 | - |
| Adot Sunset Point Rest Area | Phoenix, AZ | 1,008 | 57 | - |
| Adot Texas Canyon Rest Area | Phoenix, AZ | 1,006 | 36 | - |
| Adot Meteor Crater Rest Area | Phoenix, AZ | 1,006 | 44 | - |
| Adoc Florence Asp | Phoenix, AZ | 1,001 | 699 | Clean |
| Adot Oak Creek Rim M/S - Overlook Vista | Phoenix, AZ | 1,000 | 36 | - |
| Wupatki National Monument | Flagstaff, AZ | 1,000 | 46 | - |
| Outlets North Phoenix | Newport Beach, AZ | 1,000 | 116 | - |
| Adot Haviland Rest Area | Phoenix, AZ | 1,000 | 52 | - |
| Ehrenberg Improvement District | Ehrenberg, AZ | 989 | 240 | - |
| Aguila Water Service | Sun City, AZ | 987 | 129 | - |
| Payson Water - Mesa de Caballo | Payson, AZ | 976 | 286 | - |
| Mountain Glen Water Servic Linden Trails | Glendale, AZ | 975 | 128 | - |
| Chaparral Water Company | Tucson, AZ | 963 | 268 | - |
| Chino Valley High School | Chino Valley, AZ | 960 | 97 | Detected |
| Town & Country Estates | Farmington Hills, AZ | 960 | 222 | - |
| Usdj Fbp Fed Corr Inst Safford | Safford, AZ | 949 | 357 | - |
| Awc - Casa Grande West Water Company | Phoenix, AZ | 943 | 391 | - |
| Whetstone Dwid | Huachuca City, AZ | 940 | 105 | - |
| Maricopa Consolidated Dwid | Maricopa, AZ | 928 | 141 | - |
| Timberland Acres Dwid | Pinetop, AZ | 922 | 207 | - |
| Freeport McMoran Miami - Barney | Claypool, AZ | 916 | 82 | - |
| Rincon Country East RV Park | Tucson, AZ | 912 | 61 | - |
| Usfs Asnf Woods Canyon - Aspen Camp Area | Overgaard, AZ | 900 | 63 | - |
| Rancho del Conejo Comm Water Coop | Tucson, AZ | 900 | 275 | - |
| Adot Mohawk Ra | Phoenix, AZ | 900 | 67 | - |
| Gcnra Lees Ferry | Page, AZ | 890 | 138 | - |
| Walker Cantonment Area | Yuma, AZ | 888 | 295 | - |
| Metropolitan Dwid - E&t System | Tucson, AZ | 880 | 101 | - |
| Walden Meadows Comm Coop | Walhoit, AZ | 880 | 37 | - |
| Verde Lakes Water - Dinky Creek | Camp Verde, AZ | 875 | 190 | - |
| Sandario Water Company | Glendale, AZ | 870 | 45 | - |
| Verde Lakes Water - Big Valley | Camp Verde, AZ | 870 | 203 | - |
| Far Horizons East MHP | Tucson, AZ | 870 | 34 | - |