Aqua Nj - Harkers Hollow, NJ
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Aqua Nj - Harkers Hollow at a glance
Aqua Nj - Harkers Hollow serves about 40 people through 17 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Warren County, New Jersey. EPA system ID: NJ2110003; phone on file: 609-618-3850. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Aqua Nj - Harkers Hollow's lead record
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Aqua Nj - Harkers Hollow is 1.3 ppb across 19 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2024 | 1.2 ppb |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 0.48 ppb |
| 2021 | 0.4 ppb |
| 2020 | 0 (not detected) |
| 2020 | 1.3 ppb |
| 2019 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2019 | 0.5 ppb |
| 2018 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2016 | 0 (not detected) |
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. Aqua Nj - Harkers Hollow's reported as 0 (not detected) sits at the 1st percentile in New Jersey and the 2nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
23 other systems share Warren County; 15 of them have a higher latest lead result than Aqua Nj - Harkers Hollow. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Aqua Nj - Phillipsburg | 26,686 | 0 (not detected) |
| Hackettstown Mua | 22,000 | 5 ppb |
| Nj American Water - Washington/Oxford | 10,719 | 1 ppb |
| Allamuchy Twp Water & Sewer | 5,423 | 2.6 ppb |
| Nj American Water - Belvidere | 2,854 | 0 (not detected) |
| Alpha Municipal Water Works | 2,530 | 12 ppb |
| Township Of Blairstown Dpw | 800 | 1.01 ppb |
| Veolia Water Nj Independence Highland | 350 | 3.84 ppb |
| Country View Village, Llc | 310 | 1.14 ppb |
| Forest Manor Retirement Home | 224 | 0 (not detected) |
What to do in your house
Look up your address in Aqua Nj - Harkers Hollow's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Aqua Nj - Harkers Hollow 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. A zero today does not rule out a jump later - the rules are tightening in 2027.