Jefferson Twp W U Milton Sys, NJ
Lead detected, under the action levels
Latest 90th-percentile lead: 4.92 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.
About Jefferson Twp W U Milton Sys
Jefferson Twp W U Milton Sys serves about 4,500 people through 1,568 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Morris County, New Jersey. EPA system ID: NJ1414003; phone on file: 973-208-6102. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Jefferson Twp W U Milton Sys's lead record
That is up 1.41 ppb from 3.51 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Jefferson Twp W U Milton Sys is 6.7 ppb across 18 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 4.92 ppb |
| 2025 | 3.51 ppb |
| 2025 | 3.61 ppb |
| 2024 | 2.67 ppb |
| 2024 | 3.01 ppb |
| 2023 | 2.9 ppb |
| 2023 | 3.32 ppb |
| 2022 | 4.13 ppb |
| 2022 | 3.47 ppb |
| 2021 | 5.07 ppb |
| 2021 | 4.6 ppb |
| 2020 | 5.8 ppb |
| 2020 | 6.7 ppb |
| 2019 | 5.2 ppb |
| 2019 | 2.3 ppb |
| 2018 | 5.6 ppb |
| 2018 | 2.9 ppb |
| 2017 | 1.6 ppb |
How Jefferson Twp W U Milton Sys 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. Jefferson Twp W U Milton Sys's 4.92 ppb sits at the 91st percentile in New Jersey and the 90th nationally (higher means more lead).
Other water systems in Morris County
60 other systems share Morris County; 3 of them have a higher latest lead result than Jefferson Twp W U Milton Sys. 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 |
What to do in your house
Test your own tap with a certified lab first-draw sample; Lake Hopatcong, 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 Jefferson Twp W U Milton Sys 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.