Deer Park City Of, WA
Exceeded the action level in the past
Latest 90th-percentile lead: 1.6 ppb (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 result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Who runs the water here
Deer Park City Of serves about 5,435 people through 2,616 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 Spokane County, Washington. EPA system ID: WA5318500. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2022 (1.5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Deer Park City Of is 28.1 ppb across 3 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.6 ppb |
| 2022 | 1.5 ppb |
| 2018 | 28.1 ppb over 15 |
How Deer Park City Of 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. Deer Park City Of's 1.6 ppb sits at the 62nd percentile in Washington and the 65th nationally (higher means more lead).
Neighbouring systems
86 other systems share Spokane County; 24 of them have a higher latest lead result than Deer Park City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Spokane City Of | 346,138 | 2 ppb |
| Whitworth Water District 2 | 26,883 | 1.3 ppb |
| Vera Water & Power | 24,692 | 20.8 ppb |
| Consolidated Irrig Dist 19 System 2 | 21,220 | 1.3 ppb |
| Spo Co Water Dist 3 Sys 1 | 19,035 | 1.6 ppb |
| Modern Electric Water Co | 18,487 | 0 (not detected) |
| Eastern Washington University | 17,108 | 6.5 ppb |
| Cheney City Of | 16,954 | 1.3 ppb |
| Liberty Lake Sewer & Water District | 14,500 | 1.5 ppb |
| Fairchild Air Force Base | 9,544 | 4.2 ppb |
Next steps for Deer Park, WA
Test your own tap with a certified lab first-draw sample; Deer Park, 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 Deer Park City Of 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. More in what a past exceedance means today.