Edna Mahan Correctional, NJ
Lead detected, under the action levels
Latest 90th-percentile lead: 3 ppb (monitoring period 2022-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About Edna Mahan Correctional
Edna Mahan Correctional serves about 940 people through 32 service connections, which makes it a small system under EPA's size classes. It is owned by the state and draws groundwater, in Hunterdon County, New Jersey. EPA system ID: NJ1025001; phone on file: 908-735-3644. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is up 1.7 ppb from 1.3 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Edna Mahan Correctional is 5.4 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 3 ppb |
| 2021 | 1.3 ppb |
| 2018 | 5.4 ppb |
How Edna Mahan Correctional 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. Edna Mahan Correctional's 3 ppb sits at the 79th percentile in New Jersey and the 82nd nationally (higher means more lead).
Other water systems in Hunterdon County
23 other systems share Hunterdon County; 5 of them have a higher latest lead result than Edna Mahan Correctional. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Clinton Water Dept | 12,500 | 6.8 ppb |
| Flemington Water Department | 4,581 | 3.4 ppb |
| Veolia Water New Jersey Lambertville | 3,960 | 1 ppb |
| High Bridge W Dept | 3,300 | 6.7 ppb |
| Glen Gardner W Dept | 1,705 | 1.5 ppb |
| Milford W Dept | 1,453 | 2.5 ppb |
| Hampton Borough Water Depart | 1,401 | 1.5 ppb |
| Nj American Water - Frenchtown | 1,373 | 0 (not detected) |
| Aqua Nj - Califon | 936 | 0 (not detected) |
| Stockton Water Department | 650 | 2.6 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Clinton, NJ may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Edna Mahan Correctional 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. Size matters more than most people expect: small vs large water systems.