No health-based violations on EPA record since 2016.
Serves about 7,224 people (2,113 connections) with groundwater from its own wells.
From EPA's record for NJ1912001. PurityMap is independent of Hopatcong Water Dept.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from March 2025 to September 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanoic acid (PFOA) | 9.9 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Lithium | 9.76 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluorobutanesulfonic acid (PFBS) | 7.7 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluorohexanoic acid (PFHxA) | 9 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluorobutanoic acid (PFBA) | 11.6 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluoroheptanoic acid (PFHpA) | 3.9 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluoropentanoic acid (PFPeA) | 10.3 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-10 to 2025-09-15 | UCMR5 Analytical Results: HOPATCONG WATER DEPT (NJ1912001) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Get PurityMap updates about this water system.
Follow this water →According to EPA's record, Hopatcong Water Dept uses groundwater from its own wells.
No health-based violations on EPA record since 2016. EPA also lists 16 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Hopatcong Water Dept's latest lead and copper round, which ended in June 2026, was 8.45 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Hopatcong Water Dept. Its mailing address on EPA record is 111 RIVER STYX ROAD, HOPATCONG, NJ 07843. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.