Hat Rock Mobile Court, OR
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (monitoring period 2023-2025). 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
Hat Rock Mobile Court serves about 60 people through 28 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Umatilla County, Oregon. EPA system ID: OR4191232; phone on file: 541-371-9818. 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 up 2 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Hat Rock Mobile Court is 2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2 ppb |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
Where this result ranks
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. Hat Rock Mobile Court's 2 ppb sits at the 68th percentile in Oregon and the 70th nationally (higher means more lead).
Nearby utilities
30 other systems share Umatilla County; 5 of them have a higher latest lead result than Hat Rock Mobile Court. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Hermiston, City Of | 20,000 | 2 ppb |
| Pendleton, City Of | 16,996 | 3 ppb |
| Umatilla, City Of | 8,256 | 0 (not detected) |
| Milton-Freewater, City Of | 7,145 | 2 ppb |
| Stanfield, City Of | 2,115 | 2 ppb |
| Pilot Rock, City Of | 1,326 | 0 (not detected) |
| Athena, City Of | 1,238 | 1.76 ppb |
| Weston, City Of | 714 | 0 (not detected) |
| Echo, City Of | 632 | 0 (not detected) |
| Adams Water Dept, City Of | 400 | 2 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Beaverton, 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 Hat Rock Mobile Court 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. The action level is dropping - the 10 ppb rule from 2027.