Sparta Township Water Utility – Lake Mohawk water quality
Sparta, NJ · serves 17,625 people (5,423 connections) · Groundwater · Local government · EPA ID NJ1918004
Data: U.S. EPA · How we read the data · How we check it
Summary
PFAS above the 2024 federal limits, plus an unresolved health-based violation. Systems have until 2029 to meet the PFAS limits.
Is it an emergency? No: these findings are about longer-term exposure, and nothing in EPA's data calls for you to stop drinking the water today. If your utility ever issues a boil-water or do-not-drink notice, follow it.
- PFAS
- Above limitPFOA, PFOS above the federal limit in EPA's 2023–2025 testing (PFOA 8 ppt vs a limit of 4 ppt, PFOS 8.05 ppt vs a limit of 4 ppt, where ppt = parts per trillion).
- Lead
- Below action level1.01 ppb (parts per billion) at the 90th percentile: 9 in 10 homes sampled were at or below it. Action level 15 ppb, falling to 10 ppb in Nov 2027. Monitoring period ending Jun 2026. Your home's pipes can make yours higher.
- Violations
- 1 unresolved4 health-based violations since 2016, most recently Jul 2023.
- Pregnant, or mixing baby formula with tap water? Babies drink more water for their size, so PFAS exposure matters more for them. Consider bottled water or a filter certified for PFAS for formula, and ask your doctor. Health effects.
- To lower your PFAS exposure now, a home filter certified for PFAS reduction works (reverse osmosis, or activated carbon certified to NSF/ANSI 53 or 58). Filters for these results.
- Built before 1986, or not sure what your service line is made of? Check your service line and test your tap. Utility data can't show your pipes.
- Tested your own tap? Compare your result with these numbers. Moving? Compare this system with another.
- Read Sparta Township Water Utility – Lake Mohawk's annual water quality report (Consumer Confidence Report). It lists every regulated contaminant tested and is usually on the utility's website or mailed with your bill, and you can also request it at (973) 729-7133. EPA: how to find it.
PFAS (“forever chemicals”)
EPA UCMR 5: 13 entry points tested Dec 2023 to Jun 2024. "Average" is the highest entry-point average (non-detects counted as zero), the way EPA compares UCMR 5 results to the limits. ppt = parts per trillion. These results do not determine compliance.
| Contaminant | Highest average |
|---|---|
| PFOA Above limit Limit 4 ppt | 8 ppt 2× the limit |
| PFOS Above limit Limit 4 ppt | 8.05 ppt 2.01× the limit |
| PFHxS Detected, below limit Limit 10 ppt | 3.4 ppt 34% of the limit |
| PFNA Not detected Limit 10 ppt | – |
| HFPO-DA (GenX) Not detected Limit 10 ppt | – |
| Hazard Index (a combined score for PFHxS, PFNA, GenX and PFBS, where above 1 is over the limit) Detected, below limit Limit 1 | 0.34 |
| PFBS Detected, below limit Guideline 2,000 ppt | 10.1 ppt |
| PFBA Detected, below limit Guideline 6,000 ppt | 7.95 ppt |
| PFHxA Detected, below limit Guideline 3,000 ppt | 7.9 ppt |
| PFPeA Detected, no limit | 14.1 ppt |
New Jersey has its own PFAS limits. PFOA 14 ppt (this system's highest average: 8 ppt), PFOS 13 ppt (this system's highest average: 8.05 ppt), PFNA 13 ppt (this system's highest average: not detected). State compliance is judged on the state's own sampling, so ask the utility or the state program whether it meets them.
For context: the PFOA average is higher than at 78% of the New Jersey systems EPA tested and the PFOS average is higher than at 91% of the New Jersey systems EPA tested.
29 PFAS tested, 7 detected at least once. "Not detected" means below EPA's reporting limit (about 2 to 20 ppt depending on the chemical), not proven zero. PFAS not listed were not detected. The limits for PFHxS, PFNA, GenX and the Hazard Index were proposed for rescission in May 2026. That proposal is not final. Systems have until 2029 to meet the limits.
Lithium
Not detected in 26 samples (reporting limit 9 ppb). About lithium.
Lead and copper
Latest 90th percentile: 1.01 ppb lead (Jan 2026 – Jun 2026). Below action level
Highest since 2016: 18.3 ppb (Jun 2020).
| Monitoring period | Lead (90th pct.) |
|---|---|
| Jan 2026 – Jun 2026 | 1.01 ppb |
| Jul 2025 – Dec 2025 | 1.19 ppb |
| Jan 2025 – Jun 2025 | 0.73 ppb |
Earlier results (9)
| Jul 2024 – Dec 2024 | 1.47 ppb |
| Jan 2024 – Jun 2024 | 1.78 ppb |
| Jul 2023 – Dec 2023 | 2.03 ppb |
| Jan 2023 – Jun 2023 | 3.79 ppb |
| Jul 2022 – Dec 2022 | 1.32 ppb |
| Jan 2022 – Jun 2022 | 1.46 ppb |
| Jul 2021 – Dec 2021 | 1.49 ppb |
| Jan 2021 – Jun 2021 | 2.16 ppb |
| Jul 2020 – Dec 2020 | 1.1 ppb |
Copper 90th percentile: 1.36 ppm (Jun 2024), action level 1,300 ppb.
Lead comes from pipes and fixtures, not the source water, so it varies home to home. The 90th percentile means 9 in 10 sampled homes were at or below it. More on lead.
Violations
| When | What happened |
|---|---|
| Jul 2023 | The system did not install the treatment required to keep lead and copper from dissolving out of pipes. EPA record: Lead and Copper Rule · OCCT/SOWT Treatment Installation/Demonstration (limit TT ) Unaddressed |
| Jan 2021 | The system did not complete a required study of how to keep lead and copper from dissolving out of pipes. EPA record: Lead and Copper Rule · OCCT/SOWT Study/Recommendation (limit TT ) Resolved |
| Aug 2020 – Jan 2021 2 times | After high lead results, the system did not give customers the required information about lead. EPA record: Lead and Copper Rule · Public Education (limit TT ) Resolved |
1 unresolved monitoring or reporting violation: Lead and Copper Rule.
Health-based violations mean a contaminant exceeded a limit or a required treatment step was missed. Monitoring and reporting violations mean required tests or reports were late or missing, so the water's quality during that time is unknown. The total includes every violation in EPA's records, most of them paperwork.
Earlier EPA testing (2013–2020)
| Contaminant | Highest | Guideline |
|---|---|---|
| Manganese | 82.3 ppb | 300 ppb |
| 1,4-Dioxane | 2.7 ppb | 0.35 ppb |
| Molybdenum | 3.7 ppb | 40 ppb |
| Chromium-6 | 0.96 ppb | – |
| Strontium | 0.53 ppm | 1.5 ppm |
| Vanadium | 1.5 ppb | 21 ppb |
| Chlorate | 562 ppb | 210 ppb |
Where it serves
Sparta
ZIP codes the system reported serving: 07828, 07871
Nearby utilities
- Jefferson Township Water Utility – Lake Hopatcong Jefferson · 5 mi · PFAS above limit
- Jefferson Township Water Utility Milton System Jefferson · 5 mi · PFAS above limit
- Hopatcong Water Dept Hopatcong · 7 mi · PFAS above limit
- Rockaway Borough Water Dept Rockaway · 9 mi · PFAS above limit
- Rockaway Township Water Dept Rockaway · 9 mi · PFAS above limit
- Stanhope Water Dept Stanhope · 10 mi · PFAS above limit
Questions
Is Sparta Township Water Utility – Lake Mohawk water safe to drink?
Sparta Township Water Utility – Lake Mohawk has 1 unresolved health-based violation on record. EPA testing found PFAS above the 2024 federal limits, which systems must meet by 2029. Federal data can't tell you about your own pipes: lead comes from service lines and plumbing, so test your tap if your home was built before 1986. For the official word, read the utility's annual Consumer Confidence Report.
Does Sparta Township Water Utility – Lake Mohawk water have PFAS?
Yes. EPA's 2023–2025 testing of Sparta Township Water Utility – Lake Mohawk found 7 PFAS at least once. The highest entry-point averages were above the federal limit for PFOA and PFOS: PFOA 8 ppt, PFOS 8.05 ppt (limit 4 ppt for PFOA and PFOS, 10 ppt for the others).
What is the lead level in Sparta Township Water Utility – Lake Mohawk water?
The most recent 90th-percentile lead result for Sparta Township Water Utility – Lake Mohawk is 1.01 ppb, for the period ending Jun 2026. The federal action level is 15 ppb, falling to 10 ppb in November 2027. The 90th percentile means 9 in 10 homes sampled were at or below this number. Individual homes can be higher.
Check these numbers yourself
Every figure on this page comes from public EPA records. You don't have to take our word for it:
- EPA's own report for NJ1918004: violations, enforcement and inspections, straight from EPA.
- EPA UCMR 5 data: the PFAS and lithium results (search the file for PWSID NJ1918004).
- EPA SDWIS download: the lead results, population and violation records we use.
- The utility's annual water quality report (Consumer Confidence Report): ask Sparta Township Water Utility – Lake Mohawk at (973) 729-7133, or see EPA's guide to finding it.
Found something that doesn't match? Tell us and we'll check it against EPA's records. How we check our data.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.