Royal Senter 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.
Royal Senter Ridge S/D at a glance
Royal Senter Ridge S/D serves about 740 people through 296 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Wake County, North Carolina. EPA system ID: NC4392140; phone on file: 919-653-6999. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Royal Senter Ridge S/D is 0 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2028 | 0 (not detected) |
| 2025 | 0 (not detected) |
How Royal Senter Ridge S/D compares
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. Royal Senter Ridge S/D's reported as 0 (not detected) sits at the 56th percentile in North Carolina and the 25th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
298 other systems share Wake County; 71 of them have a higher latest lead result than Royal Senter Ridge S/D. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Raleigh, City Of | 650,000 | 0 (not detected) |
| Cary, Town Of | 227,300 | 0 (not detected) |
| Apex, Town Of | 83,001 | 0 (not detected) |
| Holly Springs, Town Of | 51,947 | 0 (not detected) |
| Fuquay-Varina, Town Of | 42,954 | 0 (not detected) |
| Bayleaf Master | 16,715 | 0 (not detected) |
| New Light Master | 2,619 | 0 (not detected) |
| Stonehenge S/D | 1,840 | 0 (not detected) |
| Rockbridge S/D | 1,042 | 7.8 ppb |
| Medfield Estates S/D | 772 | 4 ppb |
Next steps for Cary, NC
Look up your address in Royal Senter 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 Royal Senter 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Small systems behave differently: why small systems go over more often.