Twin Peaks, AK
Lead detected, under the action levels
Latest 90th-percentile lead: 4.6 ppb (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. 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.
Twin Peaks at a glance
Twin Peaks serves about 37 people through 12 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Matanuska-Susitna Borough County, Alaska. EPA system ID: AK2227539; phone on file: 218-230-3093. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is up 3.27 ppb from 1.33 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Twin Peaks is 4.6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 4.6 ppb |
| 2021 | 1.33 ppb |
| 2018 | 2.51 ppb |
How Twin Peaks 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. Twin Peaks's 4.6 ppb sits at the 83rd percentile in Alaska and the 89th nationally (higher means more lead).
Other water systems in Matanuska-Susitna Borough County
78 other systems share Matanuska-Susitna Borough County; 9 of them have a higher latest lead result than Twin Peaks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Wasilla Water System | 18,492 | 3.1 ppb |
| Palmer Water System | 8,111 | 2.3 ppb |
| Unified Alaskan Utilities Settlers Bay | 2,733 | 0.72 ppb |
| Talkeetna Water System | 1,850 | 1.4 ppb |
| Valley Utilities Llc | 1,590 | 5 ppb |
| Country Field Water Co. | 1,166 | 0.54 ppb |
| Equestrian Acres | 950 | 1.6 ppb |
| Victoria Estates | 912 | 2.14 ppb |
| Trapper Creek Watering Point | 500 | 0 (not detected) |
| Unified Alaskan Utilities Midtown Est | 495 | 0.9 ppb |
Next steps for Palmer, AK
Test your own tap with a certified lab first-draw sample; Palmer, 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 Twin Peaks 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. Size matters more than most people expect: small vs large water systems.