Carolina Water System, OR
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2026). 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
Carolina Water System serves about 300 people through 90 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Marion County, Oregon. EPA system ID: OR4100733; phone on file: 503-362-5044. They can tell you what your service line is made of and whether they pay to replace it.
Carolina Water System's lead record
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Carolina Water System is 0.6 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2019 | 0.6 ppb |
| 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. Carolina Water System's reported as 0 (not detected) sits at the 26th percentile in Oregon and the 19th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Marion County
71 other systems share Marion County; 40 of them have a higher latest lead result than Carolina Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Salem Public Works | 199,820 | 2 ppb |
| Keizer, City Of | 38,585 | 0 (not detected) |
| Woodburn, City Of | 29,455 | 3.4 ppb |
| Suburban East Salem Wd | 13,900 | 4.5 ppb |
| Silverton, City Of | 10,484 | 0 (not detected) |
| City Of Stayton | 8,400 | 6 ppb |
| Aumsville, City Of | 4,125 | 0 (not detected) |
| Mount Angel, City Of | 3,650 | 6.2 ppb |
| Hubbard, City Of | 3,478 | 0 (not detected) |
| Jefferson, City Of | 3,348 | 0 (not detected) |
What to do in your house
Look up your address in Carolina Water System'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 Carolina Water System 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.