Sunnybank Water System, 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.
Sunnybank Water System at a glance
Sunnybank Water System serves about 58 people through 55 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: WA5301266. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2022 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Sunnybank Water System is 1 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 1 ppb |
| 2019 | 0.5 ppb |
| 2016 | 0.8 ppb |
How Sunnybank Water System 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. Sunnybank Water System's reported as 0 (not detected) sits at the 7th percentile in Washington and the 5th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
45 other systems share Chelan County; 23 of them have a higher latest lead result than Sunnybank 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
Look up your address in Sunnybank Water System'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 Sunnybank 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Small systems behave differently: why small systems go over more often.