Thorne Bay, City Of, AK
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Thorne Bay, City Of at a glance
Thorne Bay, City Of serves about 470 people through 251 service connections, which makes it a very small system under EPA's size classes. It is owned by a Native American tribe and draws surface water. EPA system ID: AK2120216. Ask the utility on your bill for your address in their service line inventory.
Thorne Bay, City Of'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 Thorne Bay, City Of is 16.3 ppb across 7 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 16.3 ppb over 15 |
| 2018 | 1.81 ppb |
| 2016 | 1.31 ppb |
| 2016 | 3.07 ppb |
How Thorne Bay, City Of compares
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. Thorne Bay, City Of's reported as 0 (not detected) sits at the 12th percentile in Alaska and the 22nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Next steps for Thorne Bay, AK
Test your own tap with a certified lab first-draw sample; Thorne Bay, 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 Thorne Bay, City Of whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1450 ppb (copper action level 1,300 ppb).
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. More in what a past exceedance means today.