Lawrenceville School, NJ
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.
About Lawrenceville School
Lawrenceville School serves about 1,200 people through 89 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Mercer County, New Jersey. EPA system ID: NJ1107001; phone on file: 609-895-2081. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lawrenceville School'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 Lawrenceville School is 2.2 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 | 2.2 ppb |
How Lawrenceville School compares
Of the 605 New Jersey systems with a lead result, the median latest reading is 1 ppb; 5 are over 15 ppb right now and 52 have gone over at some point. Lawrenceville School's reported as 0 (not detected) sits at the 24th percentile in New Jersey and the 28th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
10 other systems share Mercer County; 5 of them have a higher latest lead result than Lawrenceville School. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Trenton Water Works | 217,000 | 6 ppb |
| Aqua Nj - Hamilton Square | 39,128 | 0 (not detected) |
| East Windsor Mua | 25,000 | 1.61 ppb |
| Aqua Nj - Lawrence | 8,655 | 0 (not detected) |
| Hightstown Water Department | 5,400 | 0.57 ppb |
| Pennington W Dept | 2,600 | 1 ppb |
| Hopewell Boro W Dept | 2,035 | 0 (not detected) |
| Mercer County Correctional Center | 860 | 0 (not detected) |
| Washington Crossing Park Estates | 356 | 1.4 ppb |
| Robbinsville Twp - Newtown Village | 300 | 0 (not detected) |
Next steps for Lawrenceville, NJ
Look up your address in Lawrenceville School'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 Lawrenceville School 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.