East Windsor Mua, NJ
Lead detected, under the action levels
Latest 90th-percentile lead: 1.61 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.
East Windsor Mua at a glance
East Windsor Mua serves about 25,000 people through 6,996 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 Mercer County, New Jersey. EPA system ID: NJ1101002; phone on file: 609-443-6000. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2021 (2.58 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for East Windsor Mua is 2.58 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1.61 ppb |
| 2021 | 2.58 ppb |
| 2018 | 0.99 ppb |
Against other New Jersey systems
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 Windsor Mua's 1.61 ppb sits at the 60th percentile in New Jersey and the 65th nationally (higher means more lead).
Other water systems in Mercer County
10 other systems share Mercer County; 1 of them has a higher latest lead result than East Windsor Mua. 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) |
| 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) |
| Lawrenceville School | 1,200 | 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) |
What to do in your house
Test your own tap with a certified lab first-draw sample; East Windsor 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 Windsor Mua 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.