Sparta Twp Water Utility - Lake Mohawk, NJ
Exceeded the action level in the past
Latest 90th-percentile lead: 1.01 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. 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.
Sparta Twp Water Utility - Lake Mohawk at a glance
Sparta Twp Water Utility - Lake Mohawk serves about 17,625 people through 5,423 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 Sussex County, New Jersey. EPA system ID: NJ1918004; phone on file: 973-729-7133. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Sparta Twp Water Utility - Lake Mohawk's lead record
Against the period ending 2025 (1.19 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Sparta Twp Water Utility - Lake Mohawk is 18.3 ppb across 19 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.01 ppb |
| 2025 | 1.19 ppb |
| 2025 | 0.73 ppb |
| 2024 | 1.47 ppb |
| 2024 | 1.78 ppb |
| 2023 | 2.03 ppb |
| 2023 | 3.79 ppb |
| 2022 | 1.32 ppb |
| 2022 | 1.46 ppb |
| 2021 | 1.49 ppb |
| 2021 | 2.16 ppb |
| 2020 | 1.1 ppb |
| 2020 | 18.3 ppb over 15 |
| 2019 | 2 ppb |
| 2018 | 1 ppb |
| 2018 | 1 ppb |
| 2017 | 1 ppb |
| 2017 | 0 (not detected) |
| 2016 | 2 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. Sparta Twp Water Utility - Lake Mohawk's 1.01 ppb sits at the 52nd percentile in New Jersey and the 56th nationally (higher means more lead).
Nearby utilities
59 other systems share Sussex County; 39 of them have a higher latest lead result than Sparta Twp Water Utility - Lake Mohawk. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Newton Water & Sewer Utility | 8,300 | 2.75 ppb |
| Hopatcong Water Dept | 7,224 | 9.37 ppb |
| Veolia Water New Jersey Vernon Valley | 5,517 | 0 (not detected) |
| Franklin Bd Of Public Works | 5,500 | 1.09 ppb |
| Stanhope W Dept | 3,730 | 5.88 ppb |
| Hamburg Board Of Public | 3,382 | 2.01 ppb |
| Ogdensburg W Dept | 2,800 | 1.66 ppb |
| Sussex W Dept | 2,201 | 0 (not detected) |
| Montague Water Co. | 2,165 | 2 ppb |
| Hardyston Twp Mua | 1,963 | 0 (not detected) |
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 Sparta Twp Water Utility - Lake Mohawk whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1360 ppb (copper action level 1,300 ppb).
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. Why an old exceedance still matters: over the limit before, under it now.