Wapato Waterworks, WA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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
Wapato Waterworks serves about 5,255 people through 1,506 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Yakima County, Washington. EPA system ID: WA5392800. Ask the utility on your bill for your address in their service line inventory.
Wapato Waterworks's lead record
Against the period ending 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Wapato Waterworks is 0.7 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2020 | 0.7 ppb |
| 2017 | 0.7 ppb |
How Wapato Waterworks 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. Wapato Waterworks's reported as 0 (not detected) sits at the 33rd percentile in Washington and the 35th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
88 other systems share Yakima County; 35 of them have a higher latest lead result than Wapato Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Yakima Water Division City Of | 112,858 | 0 (not detected) |
| Nob Hill Water Association | 38,050 | 0 (not detected) |
| Sunnyside City Of | 17,194 | 1.4 ppb |
| Toppenish Water Department | 13,382 | 0 (not detected) |
| Grandview City Of | 11,010 | 1.2 ppb |
| Selah City Of | 9,331 | 0 (not detected) |
| Yak Co - Terrace Heights | 8,410 | 0 (not detected) |
| Union Gap Water | 6,433 | 0 (not detected) |
| Moxee Water Department | 5,599 | 2.2 ppb |
| Granger Water Department | 3,993 | 0 (not detected) |
Next steps for Wapato, WA
Look up your address in Wapato Waterworks'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 Wapato Waterworks 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. A zero today does not rule out a jump later - the rules are tightening in 2027.