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Water Hardness in Plymouth, NH

New Hampshire · 1 zip codes · 6 matched water systems

13 PPM
0.8 GPG
Soft
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 20266 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 6 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
1 USGS-backed source
6 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 Plymouth

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

6 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.
Lebanon Water Dept
NH1321010
Soft
8 PPMsurface water10,050 servedHigh Confidence — USGS Monitoring
Plymouth Vlg Water And Sewer
NH1941010
Soft
21 PPMgroundwater6,700 servedEstimated — Nearby Data
Village At Riverbend
NH0102020
Soft
21 PPMgroundwater258 servedEstimated — Nearby Data
Tenney Brook Ii
NH1942010
Soft
21 PPMgroundwater228 servedEstimated — Nearby Data
Whip O Will
NH1943010
Soft
21 PPMgroundwater165 servedEstimated — Nearby Data
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Plymouth, NH

0326413

What This Means For You

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

Your Water Is Soft

Your water hardness is in the soft range. You likely don't need a water softener. Enjoy your naturally soft 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 Plymouth, NH.

Submit Your Data

Frequently Asked Questions

How hard is the water in Plymouth, NH?

The citywide weighted average water hardness in Plymouth, NH is 13 PPM (0.8 GPG), classified as soft. This is based on 6 matched water systems.

Do I need a water softener in Plymouth, NH?

At 13 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Plymouth, 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 Plymouth, NH?

Plymouth, New Hampshire is served by 6 matched water systems across 1 zip code.

Learn More About Your Water

Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

10 min read

How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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