Prospect Heights Comm Water Assn, WA
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 15 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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
Prospect Heights Comm Water Assn at a glance
Prospect Heights Comm Water Assn serves about 40 people through 17 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Walla Walla County, Washington. EPA system ID: WA5369700. Ask the utility on your bill for your address in their service line inventory.
Prospect Heights Comm Water Assn's lead record
That is up 13.2 ppb from 1.8 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Prospect Heights Comm Water Assn is 15 ppb across 3 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 15 ppb over 10 |
| 2020 | 1.8 ppb |
| 2017 | 3.6 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. Prospect Heights Comm Water Assn's 15 ppb sits at the 99th percentile in Washington and the 99th nationally (higher means more lead).
Other water systems in Walla Walla County
32 other systems share Walla Walla County; 0 of them have a higher latest lead result than Prospect Heights Comm Water Assn. 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 |
Next steps for Walla Walla, WA
Test your own tap with a certified lab first-draw sample; Walla Walla, WA 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 Prospect Heights Comm Water Assn 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. This system is in the band the 2027 10 ppb rule changes.