Dexter Oaks Co-Op, OR
Lead detected, under the action levels
Latest 90th-percentile lead: 9.9 ppb (monitoring period 2020-2022). 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
Dexter Oaks Co-Op serves about 75 people through 38 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Lane County, Oregon. EPA system ID: OR4100998; phone on file: 209-578-3903. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Dexter Oaks Co-Op's lead record
That is up 9.9 ppb from 0 ppb in the period ending 2019. The highest 90th-percentile result EPA holds for Dexter Oaks Co-Op is 9.9 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2022 | 9.9 ppb |
| 2019 | 0 (not detected) |
| 2016 | 4.92 ppb |
Against other Oregon systems
Of the 909 Oregon systems with a lead result, the median latest reading is 1 ppb; 15 are over 15 ppb right now and 71 have gone over at some point. Dexter Oaks Co-Op's 9.9 ppb sits at the 97th percentile in Oregon and the 97th nationally (higher means more lead).
Other water systems in Lane County
71 other systems share Lane County; 6 of them have a higher latest lead result than Dexter Oaks Co-Op. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Eugene Water & Electric Board | 176,000 | 4.5 ppb |
| Springfield Utility Board | 62,100 | 2.84 ppb |
| Cottage Grove, City Of | 10,879 | 8 ppb |
| Florence, City Of | 9,561 | 3.22 ppb |
| Junction City Water Utilities | 7,000 | 1.3 ppb |
| Rainbow Water District | 6,300 | 2.1 ppb |
| Creswell, City Of | 5,585 | 3.43 ppb |
| Veneta, City Of | 5,200 | 1.92 ppb |
| Heceta Water Peoples Utility District | 4,921 | 0 (not detected) |
| Oakridge, City Of | 3,200 | 14.2 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Dexter, OR 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 Dexter Oaks Co-Op 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. Size matters more than most people expect: small vs large water systems.