Ole Mill Stream S/D, NC
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 10.9 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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
About Ole Mill Stream S/D
Ole Mill Stream S/D serves about 325 people through 128 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Johnston County, North Carolina. EPA system ID: NC0351188; phone on file: 919-653-6999. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Ole Mill Stream S/D's lead record
That is up 10.9 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Ole Mill Stream S/D is 10.9 ppb across 3 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 10.9 ppb over 10 |
| 2022 | 0 (not detected) |
| 2016 | 2.41 ppb |
Against other North Carolina systems
Of the 1,925 North Carolina systems with a lead result, the median latest reading is 0 ppb; 5 are over 15 ppb right now and 75 have gone over at some point. Ole Mill Stream S/D's 10.9 ppb sits at the 99th percentile in North Carolina and the 98th nationally (higher means more lead).
Nearby utilities
46 other systems share Johnston County; 0 of them have a higher latest lead result than Ole Mill Stream S/D. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Johnston Co-West | 99,027 | 0 (not detected) |
| Clayton, Town Of | 30,876 | 0 (not detected) |
| Johnston Co-East | 25,212 | 0 (not detected) |
| Smithfield, Town Of | 12,900 | 0 (not detected) |
| Flowers Plantation | 12,809 | 0 (not detected) |
| Selma, Town Of | 6,190 | 0 (not detected) |
| Benson, Town Of | 4,802 | 0 (not detected) |
| Town Of Clayton - North | 4,703 | 0 (not detected) |
| Pine Level, Town Of | 2,413 | 1.4 ppb |
| Four Oaks, Town Of | 2,302 | 3 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Cary, NC 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 Ole Mill Stream S/D 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. This system is in the band the 2027 10 ppb rule changes.