Phoenix City Of, AZ
Lead detected, under the action levels
Latest 90th-percentile lead: 2.74 ppb (monitoring period 2022-2024). 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.
About Phoenix City Of
Phoenix City Of serves about 1,695,000 people through 430,118 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 surface water, in Maricopa County, Arizona. EPA system ID: AZ0407025; phone on file: 602-256-5658. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Phoenix City Of's lead record
Against the period ending 2021 (3.55 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Phoenix City Of is 4.4 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2.74 ppb |
| 2021 | 3.55 ppb |
| 2019 | 3.3 ppb |
| 2018 | 4.4 ppb |
Where this result ranks
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. Phoenix City Of's 2.74 ppb sits at the 84th percentile in Arizona and the 79th nationally (higher means more lead).
Nearby utilities
99 other systems share Maricopa County; 14 of them have a higher latest lead result than Phoenix City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mesa City Of | 466,000 | 5.01 ppb |
| Gilbert, Town Of | 247,600 | 0 (not detected) |
| Chandler City Of | 247,328 | 1.4 ppb |
| Scottsdale City Of | 241,361 | 2.3 ppb |
| Glendale City Of | 234,766 | 2.11 ppb |
| Peoria City Of | 187,676 | 0 (not detected) |
| Tempe City Of | 165,000 | 4.4 ppb |
| Epcor - Agua Fria | 128,040 | 0 (not detected) |
| Avondale City Of | 96,130 | 0 (not detected) |
| Queen Creek Town Of | 95,502 | 0 (not detected) |
Next steps for Phoenix, AZ
Test your own tap with a certified lab first-draw sample; Phoenix, 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 Phoenix 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Size matters more than most people expect: small vs large water systems.