Burton Water Cooperative, WA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.6 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. 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.
About Burton Water Cooperative
Burton Water Cooperative serves about 964 people through 422 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in King County, Washington. EPA system ID: WA5309800. Ask the utility on your bill for your address in their service line inventory.
Burton Water Cooperative's lead record
Against the period ending 2021 (1.4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Burton Water Cooperative is 1.6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1.6 ppb |
| 2021 | 1.4 ppb |
| 2018 | 1 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. Burton Water Cooperative's 1.6 ppb sits at the 62nd percentile in Washington and the 65th nationally (higher means more lead).
Neighbouring systems
153 other systems share King County; 48 of them have a higher latest lead result than Burton Water Cooperative. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Seattle Public Utilities | 1,161,961 | 1.6 ppb |
| Bellevue City Of | 321,349 | - |
| Kent Water Department | 166,421 | 0 (not detected) |
| Redmond Water System City Of | 163,335 | 2 ppb |
| Lakehaven Water And Sewer District | 148,809 | 3.3 ppb |
| Renton City Of | 108,091 | 1.9 ppb |
| Auburn City Of | 107,655 | 2.2 ppb |
| Highline Water District | 100,170 | 1.4 ppb |
| Northshore Utility District | 99,789 | - |
| Sammamish Plateau Water & Sewer | 79,362 | 1.7 ppb |
Next steps for Vashon, WA
Test your own tap with a certified lab first-draw sample; Vashon, 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 Burton Water Cooperative 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. The action level is dropping - the 10 ppb rule from 2027.