Water Hardness in Hopkinton, NH

Q: Do I need a water softener in Hopkinton, NH?

At a citywide weighted average of 17 PPM, Hopkinton has relatively soft water. A water softener is generally not necessary.

Q: How many water systems serve Hopkinton, NH?

Hopkinton, New Hampshire has 6 matched water systems across 1 zip code.

New Hampshire · 1 zip codes · 6 matched water systems

16 PPM

0.9 GPG

Soft

0Soft60120180300+

Verified - Annual Water Quality Report

City avg (weighted): 17 PPM

Dataset updated March 9, 20266 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading

Concord Water Dept

NH0501010

Water source: surface water

Serves: 44,215

USGS environmental estimate: 41 PPM

City report

Is Hopkinton, NH Water Hard or Soft?

The displayed hardness for Hopkinton, NH is 16 PPM (0.9 GPG) from Concord Water Dept, classified as soft. The citywide weighted average is 17 PPM.

Displayed reading

16 PPM

Soft

Local coverage

1 ZIP

6 matched water systems

Source label

Annual Water Quality Report

Verified - Annual Water Quality Report

Water hardness is not a drinking-water safety score. It measures calcium and magnesium minerals, and address-level results can shift by pressure zone, supply blend, building plumbing, or private well.

View matched system Methodology Data sources Search by ZIP code

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 verified treated-water source

6 matched systems total for this city; treated-water reports are prioritized when available.

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 Hopkinton

These systems are matched to Hopkinton, 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.

Water System	Source	Hardness	Pop. Served	Data Source
Concord Water Dept NH0501010	surface water	16 PPM Soft USGS estimate: 41 PPM	44,215	Verified - Annual Water Quality Report
Contoocook Village Pct NH1191010	surface water	41 PPM Soft	1,600	High Confidence - USGS Monitoring
Hopkinton Village Pct NH1191020	groundwater	18 PPM Soft	215	High Confidence - USGS Monitoring
The Meadows NH1193010	groundwater	18 PPM Soft	200	High Confidence - USGS Monitoring
Deer Meadows NH1193030	groundwater	18 PPM Soft	150	High Confidence - USGS Monitoring

Concord Water Dept

NH0501010

Soft

16 PPMsurface water44,215 servedVerified - Annual Water Quality Report

Source water: 41 PPM

Contoocook Village Pct

NH1191010

Soft

41 PPMsurface water1,600 servedHigh Confidence - USGS Monitoring

Hopkinton Village Pct

NH1191020

Soft

18 PPMgroundwater215 servedHigh Confidence - USGS Monitoring

The Meadows

NH1193010

Soft

18 PPMgroundwater200 servedHigh Confidence - USGS Monitoring

Deer Meadows

NH1193030

Soft

18 PPMgroundwater150 servedHigh Confidence - USGS Monitoring

Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Hopkinton, NH

0322917

What This Means For You

Use this city reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.

Methodology Data sources How to test your water

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Frequently Asked Questions

How hard is the water in Hopkinton, NH?

The citywide weighted average water hardness in Hopkinton, NH is 17 PPM (1 GPG), classified as soft. This is based on 6 matched water systems. The gauge highlights Concord Water Dept, a verified treated-water system, because individual systems can differ from the citywide average.

Do I need a water softener in Hopkinton, NH?

At 17 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Hopkinton, 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 Hopkinton, NH?

Hopkinton, 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

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