White Mountain Water System, AK
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2024-2026). 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 White Mountain Water System
White Mountain Water System serves about 210 people through 81 service connections, which makes it a very small system under EPA's size classes. It is owned by a Native American tribe and draws groundwater, in Nome Census Area County, Alaska. EPA system ID: AK2340507; phone on file: 907-638-2230. Call that number and ask whether your address has a lead, galvanized or unknown service line.
White Mountain Water System's lead record
Against the period ending 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for White Mountain Water System is 3.95 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2023 | 0 (not detected) |
| 2022 | 0.79 ppb |
| 2019 | 2.12 ppb |
| 2016 | 3.95 ppb |
Against other Alaska systems
Of the 394 Alaska systems with a lead result, the median latest reading is 1.6 ppb; 3 are over 15 ppb right now and 53 have gone over at some point. White Mountain Water System's 1 ppb sits at the 39th percentile in Alaska and the 52nd nationally (higher means more lead).
Nearby utilities
16 other systems share Nome Census Area County; 12 of them have a higher latest lead result than White Mountain Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Nome Joint Utility System | 3,920 | 2.41 ppb |
| Savoonga Water Supply | 802 | 2.6 ppb |
| Unalakleet City Water Supply | 757 | 1.4 ppb |
| Gambell Water System | 669 | 0.71 ppb |
| Stebbins City Water Supply | 590 | 2.5 ppb |
| Shishmaref Water System | 572 | 0.27 ppb |
| St. Michael Water System | 495 | 3.2 ppb |
| Brevig Mission Water System | 442 | 1.9 ppb |
| Elim Water Supply | 320 | 1.9 ppb |
| Quality Services, Llc Water Delivery | 300 | - |
Your move
Test your own tap with a certified lab first-draw sample; White Mountain, AK 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 White Mountain Water System 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.