How does South River's water compare to the national average?

The USA national average is 151 mg/L. South River (≈ 120–179 mg/L) is 1 mg/L softer than average.

South River Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

5.8

neutral = 7.0

Lead

0.006 mg/L

✓ Below action level

TDS

121 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

0–60

mg/L

Soft

61–120

mg/L

Moderately Hard

121–180

mg/L

Hard

180+

mg/L

Very Hard

Appliance Damage Report

In South River, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In South River	Soft Water City	Efficiency Loss
Kettle	6.8 yrs	8.5 yrs	-20%
Washing Machine	9.6 yrs	12 yrs	-20%
Water Heater	12 yrs	15 yrs	-20%

Regional Water Comparison

How South River compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ South River, New Jersey	≈ 120–179 mg/L	43.2 ppt	🟠 Hard	reservoir
Sayreville, New Jersey	≈ 120–179 mg/L	33.8 ppt	🟠 Hard	mixed
East Brunswick, New Jersey	≈ 0–60 mg/L	6 ppt	🟢 Soft	reservoir
Old Bridge, New Jersey	124 mg/L	46.9 ppt	🟠 Hard	reservoir
South Old Bridge, New Jersey	≈ 120–179 mg/L	10.2 ppt	🟠 Hard	reservoir

National Benchmark

How South River compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ South River	≈ 120–179 mg/L	🟠 Moderate
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes South River's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 121 mg/LpH: 5.8

South River Water Department serves the Borough of South River in Middlesex County, New Jersey. The utility operates a public water supply system drawing from both surface and groundwater sources within the Raritan River watershed. Treatment facilities are designed to address the region's water quality profile, serving the local residential and commercial population. Annual Consumer Confidence Reports are available through the South River Borough website.

The water supply is situated within New Jersey's Coastal Plain, characterized by Cretaceous sedimentary deposits overlain by Quaternary glacial materials. The Raritan River watershed dominates the surface hydrology of the area. This mix of sedimentary rocks and glacial deposits — containing calcium and magnesium minerals — contributes to a moderately mineralized water supply typical of central New Jersey.

At the moderately hard level, South River's water produces some scale buildup in kettles, water heaters, and pipes over time, though the effect is less severe than in harder-water areas. Residents may notice mild soap scum formation and reduced detergent efficiency. A water softener is often recommended for households seeking to minimize scale accumulation, particularly for hot-water systems. The supply also contains documented chlorate contamination; residents are encouraged to consult the annual Consumer Confidence Report for pH, lead/copper, and other regulated contaminant data.

Geology & Source: Raritan River watershed, New Jersey Coastal Plain; Cretaceous sedimentary deposits and Quaternary glacial till — calcium and magnesium from these formations produce moderate hardness

Other New Jersey Water Reports

Sayreville

≈ 120–179 mg/L

🟠 Hard

East Brunswick

≈ 0–60 mg/L

🟢 Soft

Old Bridge

124 mg/L

🟠 Hard

South Old Bridge

≈ 120–179 mg/L

🟠 Hard

Report an Issue

Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is South River's water safe to drink?

Yes. South River's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in South River?

At ≈ 120–179 mg/L (Hard), South River's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does South River compare to the USA average?

The USA national average is 151 mg/L. South River (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for South River is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

Water Hardness

Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

TDS — Total Dissolved Solids

Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.

Measured

PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances

EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.

Modelled

Lead

Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.

Calculated

Appliance Lifespan

Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.