White Mountain Water Company, AZ
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
About White Mountain Water Company
White Mountain Water Company serves about 475 people through 235 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Navajo County, Arizona. EPA system ID: AZ0409330. Ask the utility on your bill for your address in their service line inventory.
White Mountain Water Company's lead record
That is down 1.1 ppb from 1.1 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for White Mountain Water Company is 5.1 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 1.1 ppb |
| 2020 | 2.9 ppb |
| 2018 | 2.9 ppb |
| 2018 | 2.9 ppb |
| 2017 | 5.1 ppb |
How White Mountain Water Company 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. White Mountain Water Company's reported as 0 (not detected) sits at the 35th percentile in Arizona and the 22nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
39 other systems share Navajo County; 17 of them have a higher latest lead result than White Mountain Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Show Low | 17,139 | 0 (not detected) |
| Arizona Water Co - Overgaard | 13,797 | 0 (not detected) |
| Arizona Water Co - Lakeside | 12,191 | 7.8 ppb |
| Winslow City Of | 9,789 | 0 (not detected) |
| Snowflake Town Of | 5,590 | 1.7 ppb |
| Ponderosa Dwid | 5,375 | 0 (not detected) |
| Holbrook City Of | 4,833 | 0 (not detected) |
| Town Of Taylor | 4,190 | 0 (not detected) |
| Arizona Water Co - Pinetop Lakes | 3,558 | 0 (not detected) |
| Pinetop Water Community Facilities Dist | 3,250 | 10 ppb |
What to do in your house
Look up your address in White Mountain Water Company's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask White Mountain Water Company 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. A zero today does not rule out a jump later - the rules are tightening in 2027.