East Hanover Twp Water Dept, NJ
Lead detected, under the action levels
Latest 90th-percentile lead: 1.31 ppb (monitoring period 2026-2026). 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.
Who runs the water here
East Hanover Twp Water Dept serves about 11,393 people through 4,180 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Morris County, New Jersey. EPA system ID: NJ1410001; phone on file: 973-418-5075. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2025 (1.07 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for East Hanover Twp Water Dept is 8 ppb across 9 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.31 ppb |
| 2025 | 1.07 ppb |
| 2023 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2020 | 2.11 ppb |
| 2020 | 2.11 ppb |
| 2017 | 2 ppb |
| 2017 | 2 ppb |
| 2017 | 8 ppb |
How East Hanover Twp Water Dept 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. East Hanover Twp Water Dept's 1.31 ppb sits at the 56th percentile in New Jersey and the 61st nationally (higher means more lead).
Other water systems in Morris County
60 other systems share Morris County; 33 of them have a higher latest lead result than East Hanover Twp Water Dept. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Southeast Morris County Mua | 62,349 | 1.1 ppb |
| Parsippany-Troy Hills Water Department | 50,400 | 4.2 ppb |
| Dover Water Commission | 27,806 | 2.78 ppb |
| Montville Twp Mua | 22,000 | 2.31 ppb |
| Denville Twp Water Dept | 15,881 | 4.31 ppb |
| Madison Water Dept | 15,820 | 2.55 ppb |
| Randolph Twp Public Works Dept | 14,820 | 3.35 ppb |
| Pequannock Twp Water Department | 14,010 | 3.56 ppb |
| Rockaway Twp Water Dept | 14,000 | 2.57 ppb |
| Nj American Water - Roxbury | 11,793 | 4 ppb |
Your move
Test your own tap with a certified lab first-draw sample; East Hanover Township, 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 East Hanover Twp Water Dept 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. Systems that went over once often dip back under; here is what that means.