Dayton, City Of, OR
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2022-2024). 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.
About Dayton, City Of
Dayton, City Of serves about 2,535 people through 904 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Yamhill County, Oregon. EPA system ID: OR4100252; phone on file: 503-864-2221. They can tell you what your service line is made of and whether they pay to replace it.
Dayton, City Of's lead record
That is down 6.2 ppb from 6.2 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Dayton, City Of is 6.2 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 6.2 ppb |
| 2018 | 0 (not detected) |
How Dayton, City Of 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. Dayton, City Of's reported as 0 (not detected) sits at the 34th percentile in Oregon and the 32nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
37 other systems share Yamhill County; 22 of them have a higher latest lead result than Dayton, City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mcminnville Water & Light | 34,515 | 1.2 ppb |
| Newberg, City Of | 25,138 | 2.32 ppb |
| Sheridan, City Of | 6,494 | 0 (not detected) |
| Lafayette, City Of | 4,423 | 0 (not detected) |
| Dundee, City Of | 2,960 | 1.1 ppb |
| Carlton, City Of | 2,270 | 1.8 ppb |
| Willamina, City Of | 2,239 | 2.4 ppb |
| Amity, City Of | 1,810 | 0 (not detected) |
| Yamhill, City Of | 1,199 | 2.92 ppb |
| Delphian School | 350 | 1.1 ppb |
Your move
Look up your address in Dayton, City Of'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 Dayton, City Of 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. A zero today does not rule out a jump later - the rules are tightening in 2027.