Kongiganak Water System, AK
Exceeded the action level in the past
Latest 90th-percentile lead: 4.5 ppb (monitoring period 2025-2025). 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.
Kongiganak Water System at a glance
Kongiganak Water System serves about 547 people through 3 service connections, which makes it a small system under EPA's size classes. It is owned by a Native American tribe and draws surface water, in Bethel Census Area County, Alaska. EPA system ID: AK2271025; phone on file: 907-557-2322. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is up 2.2 ppb from 2.3 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Kongiganak Water System is 30 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4.5 ppb |
| 2025 | 2.3 ppb |
| 2024 | 6 ppb |
| 2024 | 6 ppb |
| 2023 | 30 ppb over 15 |
| 2022 | 1.2 ppb |
How Kongiganak Water System 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. Kongiganak Water System's 4.5 ppb sits at the 82nd percentile in Alaska and the 89th nationally (higher means more lead).
Neighbouring systems
34 other systems share Bethel Census Area County; 14 of them have a higher latest lead result than Kongiganak Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Bethel Heights Water System | 2,228 | 3.57 ppb |
| Bethel-City S/D Water | 1,660 | 0 (not detected) |
| Kwethluk New Piped Water System | 760 | 2 ppb |
| Quinhagak Water System | 724 | 0.75 ppb |
| Toksook Bay Water System | 661 | 5.6 ppb |
| Kipnuk Water System | 639 | 1 ppb |
| Akiachak Water System | 627 | 6.2 ppb |
| Chefornak Water System | 513 | 1 ppb |
| Nunapitchuk Water System | 496 | 4.6 ppb |
| Bethel Trailer Court | 446 | 2.2 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Kongiganak, 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 Kongiganak Water System whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1456 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. Why an old exceedance still matters: over the limit before, under it now.