Mason Landing 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
Mason Landing S/D serves about 61 people through 24 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in New Hanover County, North Carolina. EPA system ID: NC7065035; phone on file: 800-525-7990. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Mason Landing 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 Mason Landing S/D is 2 ppb across 5 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 | 2 ppb |
| 2016 | 0 (not detected) |
How Mason Landing 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. Mason Landing S/D's reported as 0 (not detected) sits at the 10th percentile in North Carolina and the 5th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
14 other systems share New Hanover County; 7 of them have a higher latest lead result than Mason Landing S/D. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cfpua-Wilmington | 212,227 | 0 (not detected) |
| The Cape Master System | 11,587 | 3 ppb |
| Carolina Beach Water System | 6,864 | 5.8 ppb |
| Kure Beach Water System | 5,484 | 5 ppb |
| Cfpua - Wrightsville Beach | 5,300 | 0 (not detected) |
| Figure 8 Island | 999 | 0 (not detected) |
| Treasure Cove S/D | 760 | 0 (not detected) |
| Glynnwood Mhp | 208 | 2 ppb |
| Northside Mhp | 180 | 0 (not detected) |
| South Ridge Mhp | 115 | 6 ppb |
What to do in your house
Look up your address in Mason Landing 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 Mason Landing 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. A zero today does not rule out a jump later - the rules are tightening in 2027.