South Ridge S/D, NC
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2028). 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 South Ridge S/D
South Ridge S/D serves about 135 people through 53 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Surry County, North Carolina. EPA system ID: NC0286170; phone on file: 919-467-8712. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
South Ridge S/D's lead record
That is down 11 ppb from 11 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for South Ridge S/D is 11 ppb across 2 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2028 | 0 (not detected) |
| 2025 | 11 ppb over 10 |
Where this result ranks
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. South Ridge S/D's reported as 0 (not detected) sits at the 29th percentile in North Carolina and the 12th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Surry County
34 other systems share Surry County; 11 of them have a higher latest lead result than South Ridge S/D. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mount Airy, City Of | 10,685 | 0 (not detected) |
| Elkin, Town Of | 4,076 | 0 (not detected) |
| Dobson, Town Of | 2,615 | 0 (not detected) |
| Pilot Mountain, Town Of | 1,976 | 0 (not detected) |
| Wedgewood/Town And Country Woods | 587 | 6.1 ppb |
| Hillcrest/Mcbride Heights S/D | 491 | 7 ppb |
| Hollows Water System (The) | 378 | 0 (not detected) |
| Woodbridge S/D | 318 | 0 (not detected) |
| Greenfield Water System | 244 | 0 (not detected) |
| Colonial Woods Water System | 206 | 0 (not detected) |
What to do in your house
Look up your address in South Ridge 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 South Ridge 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.