Little Butte Water System, WA
Lead detected, under the action levels
Latest 90th-percentile lead: 0.6 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 Little Butte Water System
Little Butte Water System serves about 101 people through 33 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Chelan County, Washington. EPA system ID: WA5349120. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2021 (0.7 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Little Butte Water System is 0.9 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0.6 ppb |
| 2021 | 0.7 ppb |
| 2018 | 0.9 ppb |
Where this result ranks
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. Little Butte Water System's 0.6 ppb sits at the 40th percentile in Washington and the 44th nationally (higher means more lead).
Neighbouring systems
45 other systems share Chelan County; 19 of them have a higher latest lead result than Little Butte Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Wenatchee City Of | 43,690 | 2 ppb |
| Chelan Co Pud 1 | 16,190 | 0 (not detected) |
| Leavenworth City Of | 11,041 | 0 (not detected) |
| Chelan Water Dept City Of | 9,425 | 3.2 ppb |
| Lake Chelan Reclamation District | 6,798 | 0 (not detected) |
| Cashmere Water Department | 5,815 | 5.8 ppb |
| Malaga Water District | 2,478 | 0 (not detected) |
| Chelan Co Pud - Chelan Ridge | 2,429 | 0.7 ppb |
| Alpine Water District | 2,255 | 0.8 ppb |
| Entiat City Of | 1,730 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Chelan, 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 Little Butte Water System 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. Systems that went over once often dip back under; here is what that means.