Chatham 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
Chatham S/D serves about 365 people through 143 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Chatham County, North Carolina. EPA system ID: NC0319104; phone on file: 919-653-6999. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Chatham S/D's lead record
That is down 1.25 ppb from 1.25 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Chatham S/D is 1.25 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 1.25 ppb |
How Chatham 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. Chatham S/D's reported as 0 (not detected) sits at the 47th percentile in North Carolina and the 20th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
19 other systems share Chatham County; 2 of them have a higher latest lead result than Chatham S/D. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Chatham Co-North | 23,088 | 0 (not detected) |
| Siler City, Town Of | 8,520 | 0 (not detected) |
| Pittsboro, Town Of | 6,708 | 0 (not detected) |
| Chatham Co-Sw Chatham | 2,470 | 0 (not detected) |
| Chapel Ridge S/D | 2,098 | 0 (not detected) |
| Chatham Co-Asbury | 1,540 | 0 (not detected) |
| Goldston-Gulf Sanitary Dist | 1,187 | 0 (not detected) |
| Beechwood Cove/Polks Landing | 406 | 0 (not detected) |
| Colvard Farms S/D | 365 | 1.9 ppb |
| Cole Park Plaza | 306 | 0 (not detected) |
Next steps for Cary, NC
Look up your address in Chatham 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 Chatham 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.