Wallula Water District, 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
Wallula Water District serves about 200 people through 62 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Walla Walla County, Washington. EPA system ID: WA5392600. Ask the utility on your bill for your address in their service line inventory.
Wallula Water District's lead record
Against the period ending 2022 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Wallula Water District is 1 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 1 ppb |
| 2018 | 1 ppb |
Against other Washington systems
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. Wallula Water District's reported as 0 (not detected) sits at the 22nd percentile in Washington and the 15th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Walla Walla County
32 other systems share Walla Walla County; 18 of them have a higher latest lead result than Wallula Water District. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Walla Walla Water Division | 42,959 | 4.4 ppb |
| College Place Water Dept | 8,147 | 2.1 ppb |
| Snake River Housing Water System | 3,036 | 0 (not detected) |
| Waitsburg City Of | 1,817 | 1.7 ppb |
| Consolidated Irrigation Dist 14 | 1,555 | 0 (not detected) |
| Walla Walla University | 1,273 | 0 (not detected) |
| Valle Lindo Homes | 787 | 0 (not detected) |
| Veterans Affair Med Ctr Dept Of | 785 | 1 ppb |
| Great Basin Water Burbank | 656 | 0 (not detected) |
| Green Tank Irr District 11 | 553 | 0.6 ppb |
Your move
Look up your address in Wallula Water District'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 Wallula Water District 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Small systems behave differently: why small systems go over more often.