No open health-based violations on EPA record in the last 10 years.
Serves about 8,500 people (2,490 connections) with groundwater from its own wells, and buys water from Morris County Mua.
From EPA's record for NJ1414011. PurityMap is independent of Jefferson Twp W U LK Hop.
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8 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2025 | Lead and Copper Rule | – | TT | Archived |
| From September 2024 | E. coli | – | – | Resolved |
| From July 2024 | Lead and Copper Rule | – | TT | Archived |
| From January 2024 | Lead and Copper Rule | – | TT | Archived |
| From July 2023 | Lead and Copper Rule | – | TT | Archived |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2023 | Lead and Copper Rule | – | TT | Archived |
| From July 2022 | Lead and Copper Rule | – | TT | Archived |
| From January 2022 | Lead and Copper Rule | – | TT | Archived |
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2025 to August 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 9.8 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluorooctanoic acid (PFOA) | 8.3 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluorobutanesulfonic acid (PFBS) | 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 | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluorohexanoic acid (PFHxA) | 4.3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluoropentanoic acid (PFPeA) | 7.6 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| 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 | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| 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 | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| 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 | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| 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 | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| 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 | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-11 to 2025-08-12 | UCMR5 Analytical Results: JEFFERSON TWP W U LK HOP (NJ1414011) |
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 →Jefferson Twp W U LK Hop's phone number on EPA record is 973-208-6102. Its mailing address is 1033 WELDON RD, LAKE HOPATCONG, NJ 07849.
According to EPA's record, Jefferson Twp W U LK Hop uses groundwater from its own wells, and buys water from Morris County Mua.
EPA's record shows 8 health-based violations for Jefferson Twp W U LK Hop in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. EPA also lists 71 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Jefferson Twp W U LK Hop's latest lead and copper round, which ended in June 2026. The federal action level is 15 µg/L.
PurityMap has no verified website for Jefferson Twp W U LK Hop. Its phone number on EPA record is 973-208-6102. Its mailing address on EPA record is 1033 WELDON RD, LAKE HOPATCONG, NJ 07849. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.