Marshwood Estates, NJ
Exceeded the action level in the past
Latest 90th-percentile lead: 4 ppb (monitoring period 2023-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Marshwood Estates
Marshwood Estates serves about 270 people through 93 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in York County, New Jersey. EPA system ID: ME0006735; phone on file: 617-850-9611. 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 2022 (5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Marshwood Estates is 30 ppb across 8 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 4 ppb |
| 2022 | 5 ppb |
| 2021 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2019 | 30 ppb over 15 |
| 2018 | 0 (not detected) |
| 2017 | 5.62 ppb |
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. Marshwood Estates's 4 ppb sits at the 86th percentile in New Jersey and the 87th nationally (higher means more lead).
What to do in your house
Test your own tap with a certified lab first-draw sample; Sparta, 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 Marshwood Estates 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. Why an old exceedance still matters: over the limit before, under it now.