Flagstaff City Of, AZ
Lead detected, under the action levels
Latest 90th-percentile lead: 3.6 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.
About Flagstaff City Of
Flagstaff City Of serves about 79,796 people through 23,869 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Coconino County, Arizona. EPA system ID: AZ0403008; phone on file: 928-213-2117. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is up 1.1 ppb from 2.5 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Flagstaff City Of is 3.6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 3.6 ppb |
| 2020 | 2.5 ppb |
| 2017 | 2.1 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. Flagstaff City Of's 3.6 ppb sits at the 87th percentile in Arizona and the 86th nationally (higher means more lead).
Neighbouring systems
32 other systems share Coconino County; 6 of them have a higher latest lead result than Flagstaff City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Grand Canyon National Park | 16,590 | 0 (not detected) |
| Arizona Water Co - Sedona | 12,104 | 6 ppb |
| Doney Park Water | 9,222 | 0 (not detected) |
| Arizona Water Co - Pinewood | 8,115 | 0 (not detected) |
| Page City Of | 7,445 | 0 (not detected) |
| Kachina Village Dwid | 3,500 | 0 (not detected) |
| Williams City Of | 3,145 | 8.6 ppb |
| Blue Ridge Dwid | 1,920 | 0 (not detected) |
| Forest Lakes Water Improvement District | 1,746 | 5.9 ppb |
| Utility Source Llc | 1,710 | 0 (not detected) |
Next steps for Flagstaff, AZ
Test your own tap with a certified lab first-draw sample; Flagstaff, 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 Flagstaff 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. The action level is dropping - the 10 ppb rule from 2027.