Umpqua Basin Water Assoc, OR
Exceeded the action level in the past
Latest 90th-percentile lead: 3 ppb (monitoring period 2026-2026). 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.
Umpqua Basin Water Assoc at a glance
Umpqua Basin Water Assoc serves about 9,499 people through 4,603 service connections, which makes it a medium-sized system under EPA's size classes. It is privately owned and draws surface water, in Douglas County, Oregon. EPA system ID: OR4100719; phone on file: 541-672-5559. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is up 3 ppb from 0 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Umpqua Basin Water Assoc is 35 ppb across 11 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 3 ppb |
| 2025 | 0 (not detected) |
| 2025 | 35 ppb over 15 |
| 2024 | 2 ppb |
| 2024 | 6 ppb |
| 2023 | 35 ppb over 15 |
| 2022 | 8 ppb |
| 2020 | 8 ppb |
| 2019 | 9 ppb |
| 2017 | 9 ppb |
| 2016 | 11 ppb over 10 |
How Umpqua Basin Water Assoc compares
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. Umpqua Basin Water Assoc's 3 ppb sits at the 79th percentile in Oregon and the 83rd nationally (higher means more lead).
Neighbouring systems
35 other systems share Douglas County; 14 of them have a higher latest lead result than Umpqua Basin Water Assoc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Roseburg, City Of | 28,800 | 0 (not detected) |
| Winston-Dillard Water District | 8,300 | 7 ppb |
| Sutherlin, City Of | 8,060 | 3 ppb |
| Green Area Water & Sanitary Authority | 7,000 | 0 (not detected) |
| Reedsport, City Of | 4,836 | 4 ppb |
| Myrtle Creek, City Of | 3,501 | 5 ppb |
| Tri-City Jw&Sa | 3,500 | 2 ppb |
| Canyonville, City Of | 1,662 | 2 ppb |
| Glide Water Association | 1,523 | 3 ppb |
| Riddle, City Of | 1,224 | 10 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Roseburg, 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 Umpqua Basin Water Assoc 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. Why an old exceedance still matters: over the limit before, under it now.