Four Lakes Water District 10, WA
Lead detected, under the action levels
Latest 90th-percentile lead: 0.6 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. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Who runs the water here
Four Lakes Water District 10 serves about 433 people through 184 service connections, which makes it a very small 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: WA5326200. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
That is down 2.6 ppb from 3.2 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Four Lakes Water District 10 is 3.2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.6 ppb |
| 2022 | 3.2 ppb |
| 2019 | 1.1 ppb |
| 2016 | 1.3 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. Four Lakes Water District 10's 0.6 ppb sits at the 40th percentile in Washington and the 45th nationally (higher means more lead).
Neighbouring systems
86 other systems share Spokane County; 48 of them have a higher latest lead result than Four Lakes Water District 10. 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 Four Lakes, WA
Test your own tap with a certified lab first-draw sample; Four Lakes, 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 Four Lakes Water District 10 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. Systems that went over once often dip back under; here is what that means.