Tucson City Of, AZ
Lead detected, under the action levels
Latest 90th-percentile lead: 0.65 ppb (monitoring period 2021-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Tucson City Of at a glance
Tucson City Of serves about 732,906 people through 191,264 service connections, which makes it a very large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Pima County, Arizona. EPA system ID: AZ0410112; phone on file: 520-837-2430. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Tucson City Of's lead record
Against the period ending 2020 (0.9 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Tucson City Of is 1.1 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0.65 ppb |
| 2020 | 0.9 ppb |
| 2017 | 1.1 ppb |
How Tucson City Of compares
Of the 730 Arizona systems with a lead result, the median latest reading is 0 ppb; 9 are over 15 ppb right now and 58 have gone over at some point. Tucson City Of's 0.65 ppb sits at the 71st percentile in Arizona and the 46th nationally (higher means more lead).
Other water systems in Pima County
137 other systems share Pima County; 32 of them have a higher latest lead result than Tucson City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Metropolitan Dwid | 45,570 | 0.57 ppb |
| Oro Valley Water Utility | 42,316 | 1 ppb |
| Community Wc Of Green Valley | 22,085 | 0 (not detected) |
| Usaf Davis Monthan Afb | 18,640 | 0 (not detected) |
| Sahuarita Water Company | 18,178 | 0 (not detected) |
| Vail Water Company | 17,500 | 0 (not detected) |
| Flowing Wells Irrigation District | 16,000 | 0 (not detected) |
| Marana Municipal - Marana | 15,162 | 0 (not detected) |
| Tucson Water Corona De Tucson | 10,217 | 0.78 ppb |
| Green Valley Dwid | 8,687 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Tucson, AZ may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Tucson City Of whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.