Union, Union County
Water treatment in Union, NJ
Union Township sits where two New Jersey American Water systems meet. Some homes get Raritan system water and others get Short Hills system water, and the two reports read quite differently, especially on minerals like manganese and sodium.
- Free installation
Water quality
What's in Union's water
From New Jersey American Water, Raritan system's and New Jersey American Water, Short Hills system's latest annual water quality reports. Your own test shows what reaches your tap.
New Jersey American Water, Raritan system
2025 test results · public water system NJ2004002
- Where it comes from
- 98 wells and 7 surface intakes on the Millstone and Raritan rivers and the Delaware & Raritan Canal, plus the Brunswick, Stockton, Passaic and other aquifers.
- Disinfectant
- Chloramines for river water and chlorine for well water. Residuals in the pipes ranged from 0.02 to 4 ppm, with a highest running average of 1.2 ppm.
- Hardness
- Not listed in the report. We measure it at your tap during the water test.
- PFAS
- PFOA up to 7 ppt and PFOS up to 6 ppt, within New Jersey's limits (14 and 13). Federal limits of 4.0 ppt each take effect in April 2029.
- Lead
- 2 ppb at the 90th percentile; none of the 54 homes tested was over the action level.
New Jersey American Water, Short Hills system
2025 test results · public water system NJ0712001
- Where it comes from
- 25 wells and 4 intakes on the Passaic River and Canoe Brook, plus water bought from Newark, Montclair, the Passaic Valley Water Commission, the Southeast Morris County MUA, and NJ American Water's Raritan system.
- Disinfectant
- Chlorine for well water, and chlorine or chloramines for surface water. Chlorine in the pipes measured 0.7 to 1.0 ppm.
- Hardness
- 52 to 342 mg/L in 2024 testing, about 3 to 20 grains per gallon.
- PFAS
- PFOA's highest running average was 9 ppt (single results up to 11) and PFOS 5 ppt: within New Jersey's limits, above the federal 4.0 ppt limits that apply from April 2029.
- Lead
- 3 ppb at the 90th percentile, but 2 of the 56 homes tested were over the 15 ppb action level.
What it means in Union
Listed by both systems
New Jersey American Water names Union among the communities served by its Raritan system and by its Short Hills system, so which report applies depends on your address.
Manganese differs by side
On the Short Hills side, manganese peaked at 2,464 ppb in 2025. The Raritan system's highest reading was 0.05 ppm, which is right at the 50 ppb staining guideline.
Sodium runs high on both
Both systems topped the 50 ppm sodium guideline at times in 2025: up to 99 ppm from Raritan and up to 139 ppm from Short Hills.
Our systems
The systems Union homes usually need
Complete Home System
City-water homes that want every tap and appliance protected at once
Details about the Complete Home System
Whole-Home Water Softener
Homes with hard water and limited space
Details about the Whole-Home Water Softener
Tankless Alkaline RO
Replacing bottled water for drinking and cooking
Details about the Tankless Alkaline RO
- Free installation
FAQ
Union water questions
Can't find what you're looking for? Call (856) 276-5310. A real person picks up.
Which water system serves my home in Union?
Call New Jersey American Water customer service at 1-800-272-1325 with your address. Either way, our water test shows what's actually reaching your tap.
Is Union Township water hard?
On the Short Hills side, hardness ranged from 52 to 342 mg/L in 2024 testing. The Raritan report doesn't list hardness, so we measure it in your kitchen.
Does Union's water have PFAS?
Both systems detected PFOA and PFOS in 2025, below New Jersey's limits: up to 7 ppt PFOA on the Raritan side, and a highest running average of 9 ppt on the Short Hills side.
Water quiz
Find the right system for your home
Answer five quick questions and we'll recommend a water treatment solution for your home. Then book your free water test and quote.
- Takes about a minute
- Instant recommendation
- Prefer to talk? Call (856) 276-5310