Walla Walla University, WA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2021-2023). 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.
About Walla Walla University
Walla Walla University serves about 1,273 people through 460 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Walla Walla County, Washington. EPA system ID: WA5392470. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is down 1.7 ppb from 1.7 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Walla Walla University is 2 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 1.7 ppb |
| 2017 | 2 ppb |
How Walla Walla University compares
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. Walla Walla University's reported as 0 (not detected) sits at the 31st percentile in Washington and the 28th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
32 other systems share Walla Walla County; 18 of them have a higher latest lead result than Walla Walla University. 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) |
| 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 |
| Burbank Irrigation District 4 | 527 | 0 (not detected) |
Your move
Look up your address in Walla Walla University'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 Walla Walla University 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. A zero today does not rule out a jump later - the rules are tightening in 2027.