New Jersey tap water / Towns / Morris County
Long Hill, NJ tap water quality
Long Hill's water met New Jersey's PFAS limits in 2025, but PFOA and PFOS were above EPA's national limit of 4 ppt, which utilities must meet by 2029.
Long Hill, in Morris County, has about 8,684 residents. Virtually all of them live inside the service area of New Jersey American Water's Short Hills system, according to New Jersey DEP's service area map.
PFAS in the 2025 report Highest running annual average, NJ American Water, Short Hills system
- PFOA9 pptRange in the report: not detected to 11 pptNJ limit 14 · Federal limit 4Below NJ limit, above federal
- PFOS5 pptRange in the report: not detected to 6 pptNJ limit 13 · Federal limit 4Below NJ limit, above federal
Charts and full results for the NJ American Water, Short Hills system
Is Long Hill tap water safe?
We don't say whether Long Hill's tap water is safe to drink: that's a health question, for your doctor or your utility. What we show is what the utility reported next to New Jersey's and EPA's legal limits, starting with PFAS here; hardness and lead follow below.
For PFAS, the Short Hills system's 2025 water quality report lists the highest running annual average: 9 ppt of PFOA and 5 ppt of PFOS. These were below New Jersey's limits (14 ppt for PFOA and 13 ppt for PFOS), the ones utilities must meet today, but PFOA and PFOS were above EPA's national limits (4 ppt each). A reported value above EPA's limit isn't a violation yet: utilities must meet EPA's PFOA and PFOS limits by 2029, and compliance is then judged on running annual averages. See how New Jersey water systems compare on PFAS.
Hardness and lead in Long Hill's water
- Hardness
- Up to 342 mg/LUp to 20 grains per gallon, soft to very hardNew Jersey's recommended upper limit 250 mg/L (for taste and appearance; not enforceable); no federal limit.
- Lead, 90th percentile of home taps
- 3 ppbAction level: 15 ppb, dropping to 10 ppb in November 2027
Up to 20 grains per gallon in Long Hill's report: size a water softener for Long Hill. Compare it with hardness in other New Jersey water systems.
Filtering Long Hill's tap water at home
PFOA and PFOS were above the federal limits in this system's report. We found 9 filters with a certified PFOA and PFOS reduction claim (on its own or as part of a total PFAS claim), checked against the manufacturer's performance data sheet; the water system page lists them with a link to each document.
Where does Long Hill's water come from?
The Short Hills system's 2025 report lists its own sources as 25 wells, 4 surface water intakes (Passaic River, Canoe Brook, Brunswick aquifer, glacial sand and gravel, igneous and metamorphic rocks). It also buys water from Southeast Morris County Utilities Authority, Newark, Montclair, New Jersey American Water, Raritan system and Passaic Valley Water Commission.
The Short Hills system is run by New Jersey American Water. Its customer service page covers paying a bill and starting or stopping service.
Local factors in Long Hill
Long Hill's municipal boundary on aerial photos taken between August 9 and August 20, 2023. The town boundary and the water system's service area aren't always the same.
Source: USDA National Agriculture Imagery Program, via USGS The National Map; boundary from NJ Office of GIS.
Age of homes
63% (margin of error ±10 percentage points) of homes in Long Hill were built before 1980 (Morris County: 62%, New Jersey: 63%; U.S. Census ACS 2020-2024). The utility's water quality report describes water leaving the system, not the plumbing inside a home; why the build year matters for lead.
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates, table B25034 (Year Structure Built).
Lead service lines
New Jersey American Water's service line map, where you can look up your own address, lists 3,143 service lines (the pipes from the water main to each building) in Long Hill on October 31, 2026. 15 of them (under 1%) have lead on the utility's side, the property owner's side or both (1 only on the utility's side, 13 only on the owner's side, 1 on both), and New Jersey's 2021 lead service line law requires the utility to replace them, including the part on private property. For 1,890, the material on at least one side hasn't been identified yet (how we count service lines; all towns compared).
Source: New Jersey American Water, service line material map, lines counted inside the town boundary on October 31, 2026; New Jersey Board of Public Utilities, 2022 order quoting the 2021 lead service line law (N.J.S.A. 58:12A-40).
Known contaminated sites
NJDEP lists 18 sites in Long Hill where soil or groundwater contamination has been confirmed (October 14, 2026). These are places under cleanup oversight; they do not mean that tap water from the public system is contaminated. The public water system is tested and treated separately.
Source: New Jersey DEP, Known Contaminated Sites List map layer, retrieved October 16, 2026, with site-by-site lists in NJDEP's Known Contaminated Sites reports.
Water and sewer bills
In the Census Bureau's survey (ACS 2020-2024, about this question), 95% (margin of error ±2 percentage points) of occupied homes in Long Hill pay a separate charge for water and sewer; the rest report no charge or a charge included in other fees, such as rent. Among the homes that pay, 54% (margin of error ±7 percentage points) report $1,000 or more for the year (30% in Morris County, 30% statewide), as households report it rather than as the utility bills it.
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates, table B25134 (Annual Water and Sewer Costs).
ZIP codes covering Long Hill: 07933, 07946, 07980. Source: U.S. Census Bureau 2020 ZIP Code Tabulation Areas.
Sources. 2025 water quality report, New Jersey American Water, Short Hills system (public water system NJ0712001), checked against the original in September, October and November 2026; EPA Safe Drinking Water Information System. How we check the data · report an error.
Other towns on the same water system
These towns get their water from the New Jersey American Water, Short Hills system, so their results match Long Hill's: