Tierra Linda Estates, WA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Tierra Linda Estates at a glance
Tierra Linda Estates serves about 450 people through 106 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Umatilla County, Washington. EPA system ID: OR4101044; phone on file: 360-398-6114. 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 down 4 ppb from 4 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Tierra Linda Estates is 4 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2022 | 0 (not detected) |
| 2021 | 4 ppb |
| 2016 | 0 (not detected) |
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. Tierra Linda Estates's reported as 0 (not detected) sits at the 27th percentile in Washington and the 22nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Umatilla County
1 other system shares Umatilla County; 0 of them have a higher latest lead result than Tierra Linda Estates. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sunridge Water Inc | 200 | 0 (not detected) |
What to do in your house
Look up your address in Tierra Linda Estates's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Tierra Linda 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. A zero today does not rule out a jump later - the rules are tightening in 2027.