Usfs Knf Tusayan Admin, AZ
Lead detected, under the action levels
Latest 90th-percentile lead: 3.9 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.
Who runs the water here
Usfs Knf Tusayan Admin serves about 80 people through 31 service connections, which makes it a very small system under EPA's size classes. It is federally owned and draws groundwater, in Coconino County, Arizona. EPA system ID: AZ0403659; phone on file: 928-522-3332. 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 1.82 ppb from 2.08 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Usfs Knf Tusayan Admin is 6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 3.9 ppb |
| 2020 | 2.08 ppb |
| 2017 | 6 ppb |
Against other Arizona systems
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. Usfs Knf Tusayan Admin's 3.9 ppb sits at the 88th percentile in Arizona and the 87th nationally (higher means more lead).
Other water systems in Coconino County
32 other systems share Coconino County; 4 of them have a higher latest lead result than Usfs Knf Tusayan Admin. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Flagstaff City Of | 79,796 | 3.6 ppb |
| 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 |
What to do in your house
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 Usfs Knf Tusayan Admin 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. Systems that went over once often dip back under; here is what that means.