Monroe Twp Utility Department, NJ
Lead detected, under the action levels
Latest 90th-percentile lead: 1.34 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 Monroe Twp Utility Department
Monroe Twp Utility Department serves about 36,000 people through 22,379 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 groundwater, in Middlesex County, New Jersey. EPA system ID: NJ1213002; phone on file: 732-521-1700. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2025 (1.69 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Monroe Twp Utility Department is 3.2 ppb across 14 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.34 ppb |
| 2025 | 1.69 ppb |
| 2024 | 1.28 ppb |
| 2023 | 3.2 ppb |
| 2022 | 0 (not detected) |
| 2021 | 1.28 ppb |
| 2020 | 0.71 ppb |
| 2019 | 2 ppb |
| 2019 | 2 ppb |
| 2018 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2017 | 2.8 ppb |
| 2016 | 0 (not detected) |
Where this result ranks
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. Monroe Twp Utility Department's 1.34 ppb sits at the 57th percentile in New Jersey and the 61st nationally (higher means more lead).
Neighbouring systems
13 other systems share Middlesex County; 5 of them have a higher latest lead result than Monroe Twp Utility Department. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Middlesex Water Company | 233,376 | 0.85 ppb |
| Old Bridge Mua | 68,000 | 1.75 ppb |
| New Brunswick W Dept | 55,000 | 1.78 ppb |
| Perth Amboy Water Department | 52,328 | 0 (not detected) |
| East Brunswick Water Utility | 49,715 | 0.4 ppb |
| Sayreville W Dept | 45,345 | 0.54 ppb |
| North Brunswick W Dept | 43,905 | 2.4 ppb |
| Edison Water Co | 35,000 | 1.18 ppb |
| South River W Dept | 16,000 | 0 (not detected) |
| Highland Park W Dept | 14,000 | 0.63 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Monroe 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 Monroe Twp Utility Department 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. Size matters more than most people expect: small vs large water systems.