Cascadia Park Water Company, 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.
About Cascadia Park Water Company
Cascadia Park Water Company serves about 93 people through 31 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Yakima County, Washington. EPA system ID: WA5311625. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2022 (0.5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Cascadia Park Water Company is 1.6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0.5 ppb |
| 2018 | 1.6 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. Cascadia Park Water Company's reported as 0 (not detected) sits at the 14th percentile in Washington and the 9th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
88 other systems share Yakima County; 35 of them have a higher latest lead result than Cascadia Park Water Company. 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 |
| Wapato Waterworks | 5,255 | 0 (not detected) |
What to do in your house
Look up your address in Cascadia Park Water Company'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 Cascadia Park Water Company 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.