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Water Hardness in Newton, NH

New Hampshire · 1 zip codes · 7 matched water systems

107 PPM
6.2 GPG
Slightly Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 20267 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 7 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
5 USGS-backed sources
7 matched systems total for this city; USGS monitoring is used where treated-water reports are unavailable.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems in Newton

These systems are matched to Newton, NH. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

7 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
Aquarion Water/Nh
NH1051010
Moderately Hard
126 PPMgroundwater34,000 servedEstimated — County Avg
Portsmouth Water Works
NH1951010
Moderately Hard
126 PPMsurface water33,000 servedHigh Confidence — USGS Monitoring
Salem Water Dept
NH2051010
Slightly Hard
71 PPMsurface water21,000 servedHigh Confidence — USGS Monitoring
Derry Water Dept
NH0611010
Soft
23 PPMsurface water17,210 servedHigh Confidence — USGS Monitoring
Seabrook Water Dept
NH2111010
Moderately Hard
154 PPMgroundwater14,000 servedHigh Confidence — USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Newton, NH

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Slightly Hard Water

Your water is slightly hard. You may notice minor spotting on dishes or a slight film on faucets. A water softener is optional but can improve water quality.

Recommended Products

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | How to Test Your Water

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Newton, NH.

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Frequently Asked Questions

How hard is the water in Newton, NH?

The citywide weighted average water hardness in Newton, NH is 107 PPM (6.2 GPG), classified as slightly hard. This is based on 7 matched water systems.

Do I need a water softener in Newton, NH?

At 107 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Newton, NH safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve Newton, NH?

Newton, New Hampshire is served by 7 matched water systems across 1 zip code.

Learn More About Your Water