Millstone S/D, NC
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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
Millstone S/D serves about 272 people through 107 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Franklin County, North Carolina. EPA system ID: NC4035009; phone on file: 919-662-0457. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Millstone S/D's lead record
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Millstone S/D is 0 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
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. Millstone S/D's reported as 0 (not detected) sits at the 43rd percentile in North Carolina and the 18th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
16 other systems share Franklin County; 5 of them have a higher latest lead result than Millstone S/D. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Franklin County Water & Sewer | 26,060 | 0 (not detected) |
| Louisburg, Town Of | 4,554 | 0 (not detected) |
| Franklinton, Town Of | 3,142 | 0 (not detected) |
| Bunn, Town Of | 950 | 3 ppb |
| Oak Hills Mobile Home Park | 505 | 0.7 ppb |
| Pleasant Acres Mhp | 217 | 1.1 ppb |
| Fox Park Mhp | 158 | 0 (not detected) |
| Sweet Briar S/D | 143 | 0 (not detected) |
| Woodford S/D | 125 | 0 (not detected) |
| Rustic Ridge Mhp | 117 | 0 (not detected) |
What to do in your house
Look up your address in Millstone S/D'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 Millstone 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. Small systems behave differently: why small systems go over more often.