Timberlane Mobile Estates, WA
Exceeded the action level in the past
Latest 90th-percentile lead: 3.8 ppb (monitoring period 2023-2023). 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.
Who runs the water here
Timberlane Mobile Estates serves about 120 people through 60 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Thurston County, Washington. EPA system ID: WA5388383. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is up 1.6 ppb from 2.2 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Timberlane Mobile Estates is 21 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 3.8 ppb |
| 2022 | 2.2 ppb |
| 2020 | 2.4 ppb |
| 2019 | 3.9 ppb |
| 2018 | 2.5 ppb |
| 2017 | 21 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. Timberlane Mobile Estates's 3.8 ppb sits at the 87th percentile in Washington and the 86th nationally (higher means more lead).
Other water systems in Thurston County
195 other systems share Thurston County; 46 of them have a higher latest lead result than Timberlane Mobile Estates. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Olympia City Of | 126,966 | 3.4 ppb |
| Lacey Water Department | 105,178 | 6 ppb |
| Tumwater City Of | 51,924 | 8 ppb |
| Yelm City Of | 17,355 | 1.9 ppb |
| Tanglewilde Thompson Place 600 | 7,900 | 2.8 ppb |
| Pattison 500 | 4,643 | 3.1 ppb |
| Grand Mound | 3,764 | 0 (not detected) |
| Tenino City Of | 3,336 | 9 ppb |
| Rainier Water Department | 3,103 | 3.4 ppb |
| Meadows 690 | 3,100 | 5.9 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Napavine, 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 Timberlane Mobile Estates 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. Why an old exceedance still matters: over the limit before, under it now.