Summerset West Water Association, WA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Summerset West Water Association serves about 240 people through 72 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Adams County, Washington. EPA system ID: WA5385080. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is down 1.6 ppb from 1.6 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Summerset West Water Association is 1.6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 1.6 ppb |
| 2018 | 1 ppb |
Where this result ranks
Of the 2,218 Washington systems with a lead result, the median latest reading is 1 ppb; 18 are over 15 ppb right now and 62 have gone over at some point. Summerset West Water Association's reported as 0 (not detected) sits at the 23rd percentile in Washington and the 17th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
30 other systems share Adams County; 5 of them have a higher latest lead result than Summerset West Water Association. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Othello Water Department | 8,755 | 0 (not detected) |
| Ritzville Water Department | 1,725 | 0 (not detected) |
| Lind Town Of | 903 | 0 (not detected) |
| Adams County Water Dist #1 | 870 | 0 (not detected) |
| Othello Manor Llc | 400 | 0 (not detected) |
| Golden Plains Mhp #1 | 360 | 0 (not detected) |
| Washtucna Water Department | 250 | 0 (not detected) |
| Saddle Mountain Water Assoc. | 219 | 2.8 ppb |
| Othello Country Club Water Assn | 208 | 0 (not detected) |
| Radar Community Llc | 200 | 0 (not detected) |
Your move
Look up your address in Summerset West Water Association's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Summerset West Water Association 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. Small systems behave differently: why small systems go over more often.