Greenbrook S/D, AK
Exceeded the action level in the past
Latest 90th-percentile lead: 1.9 ppb (monitoring period 2023-2025). 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.
Who runs the water here
Greenbrook S/D serves about 123 people through 35 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Anchorage Municipality County, Alaska. EPA system ID: AK2210346; phone on file: 907-562-3345. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2022 (2.2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Greenbrook S/D is 17 ppb across 7 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.9 ppb |
| 2022 | 2.2 ppb |
| 2021 | 2.2 ppb |
| 2020 | 3.95 ppb |
| 2020 | 3.22 ppb |
| 2019 | 17 ppb over 15 |
| 2016 | 12.7 ppb over 10 |
How Greenbrook S/D 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. Greenbrook S/D's 1.9 ppb sits at the 55th percentile in Alaska and the 68th nationally (higher means more lead).
Nearby utilities
66 other systems share Anchorage Municipality County; 27 of them have a higher latest lead result than Greenbrook S/D. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Moa Municipality Of Anchorage | 221,351 | 0 (not detected) |
| Jber-Elmendorf | 30,003 | 0 (not detected) |
| Doyon Utilities Jber - Richardson | 20,284 | 0 (not detected) |
| Girdwood Water System | 2,625 | 2.82 ppb |
| Ow Dimond Estates Trailer Court | 1,395 | 0 (not detected) |
| Southwood Manor Tc | 1,005 | 4.8 ppb |
| Penland Park Mhp | 993 | 0.36 ppb |
| Manoogs Isle Mobile Home Park | 935 | 1 ppb |
| Glencaren Court | 828 | 1.2 ppb |
| Rangeview Tc | 795 | 0.05 ppb |
Next steps for Anchorage, AK
Test your own tap with a certified lab first-draw sample; Anchorage, 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 Greenbrook S/D 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. More in what a past exceedance means today.