Sitka, AK
Exceeded the action level in the past
Latest 90th-percentile lead: 8.3 ppb (monitoring period 2026-2026). 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.
Who runs the water here
Sitka serves about 9,448 people through 3,620 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a Native American tribe and draws surface water, in Sitka City And Borough County, Alaska. EPA system ID: AK2130075; phone on file: 907-747-4074. 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 down 5.7 ppb from 14 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Sitka is 33 ppb across 7 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 8.3 ppb |
| 2025 | 14 ppb over 10 |
| 2024 | 13 ppb over 10 |
| 2024 | 19 ppb over 15 |
| 2023 | 33 ppb over 15 |
| 2020 | 5.4 ppb |
| 2017 | 6.86 ppb |
Where this result ranks
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. Sitka's 8.3 ppb sits at the 94th percentile in Alaska and the 96th nationally (higher means more lead).
Other water systems in Sitka City And Borough County
1 other system shares Sitka City And Borough County; 0 of them have a higher latest lead result than Sitka. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Port Alexander Pws | 95 | 2.5 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Sitka, 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 Sitka 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. Why an old exceedance still matters: over the limit before, under it now.