Timber Water Association, OR
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2018-2020). 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.
Timber Water Association at a glance
Timber Water Association serves about 180 people through 70 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Washington County, Oregon. EPA system ID: OR4100898; phone on file: 503-359-0520. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 15.8 ppb from 15.8 ppb in the period ending 2017. The highest 90th-percentile result EPA holds for Timber Water Association is 17.6 ppb across 6 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2020 | 0 (not detected) |
| 2017 | 15.8 ppb over 15 |
| 2017 | 0 (not detected) |
| 2016 | 1.1 ppb |
| 2016 | 17.6 ppb over 15 |
| 2016 | 13.3 ppb over 10 |
How Timber Water Association 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. Timber Water Association's reported as 0 (not detected) sits at the 22nd percentile in Oregon and the 14th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
28 other systems share Washington County; 18 of them have a higher latest lead result than Timber Water Association. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Tualatin Valley Water District | 224,600 | 5.3 ppb |
| Hillsboro, City Of | 92,632 | 0 (not detected) |
| Beaverton, City Of | 88,045 | 2.6 ppb |
| Tigard, City Of | 62,500 | 0.98 ppb |
| Tualatin, City Of | 28,106 | 4.93 ppb |
| Forest Grove, City Of | 26,838 | 3.6 ppb |
| Sherwood, City Of | 20,781 | 1.3 ppb |
| Cornelius, City Of | 14,490 | 0 (not detected) |
| West Slope Water District | 11,000 | 5.01 ppb |
| Raleigh Water District | 4,500 | 5.01 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Timber, 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 Timber Water Association whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1610 ppb (copper action level 1,300 ppb).
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. Why an old exceedance still matters: over the limit before, under it now.