Duck Lake Water Association, WA
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2025-2025). 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.
Duck Lake Water Association at a glance
Duck Lake Water Association serves about 635 people through 190 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Okanogan County, Washington. EPA system ID: WA5320200. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2024 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Duck Lake Water Association is 25.2 ppb across 3 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2017 | 25.2 ppb over 15 |
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. Duck Lake Water Association's reported as 0 (not detected) sits at the 29th percentile in Washington and the 24th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
42 other systems share Okanogan County; 23 of them have a higher latest lead result than Duck Lake Water Association. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Omak City Of | 4,940 | 3 ppb |
| Brewster City Of | 3,843 | 1.7 ppb |
| Okanogan Water Department City Of | 3,817 | 1.4 ppb |
| Oroville City Of | 3,256 | 3.2 ppb |
| Tonasket Water System | 2,398 | 0 (not detected) |
| Coulee Dam Water Dept | 1,454 | 1.7 ppb |
| Winthrop Town Of | 1,350 | 1 ppb |
| Twisp Town Of | 1,173 | 1.1 ppb |
| Monse-Riggan Camp | 1,165 | 0 (not detected) |
| Pateros Water Department | 1,149 | 2.8 ppb |
Next steps for Okanogan, WA
Test your own tap with a certified lab first-draw sample; Okanogan, 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 Duck Lake Water Association 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. More in what a past exceedance means today.