Columbia City Mun Waterworks, 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.
Who runs the water here
Columbia City Mun Waterworks serves about 1,995 people through 876 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 Columbia County, Oregon. EPA system ID: OR4100203; phone on file: 503-366-0454. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 2 ppb from 2 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Columbia City Mun Waterworks is 2 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 2 ppb |
| 2018 | 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. Columbia City Mun Waterworks's reported as 0 (not detected) sits at the 33rd percentile in Oregon and the 31st 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 Columbia County; 14 of them have a higher latest lead result than Columbia City Mun Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| St Helens, City Of | 13,410 | 1.03 ppb |
| Scappoose, City Of | 8,710 | 0 (not detected) |
| Mcnulty Water Pud | 2,500 | 0 (not detected) |
| Vernonia, City Of | 2,100 | 0 (not detected) |
| Clatskanie, City Of | 2,096 | 1.27 ppb |
| Warren Water Association | 2,050 | 0 (not detected) |
| City Of Rainier | 1,932 | 0 (not detected) |
| Western Hills Mh Estates | 375 | 0 (not detected) |
| Fishhawk Lake Reserve And Community | 350 | 6.25 ppb |
| Quincy Water Association | 300 | 0 (not detected) |
Your move
Look up your address in Columbia City Mun Waterworks'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 Columbia City Mun Waterworks 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.