Water Hardness in Oakham, MA

Q: Do I need a water softener in Oakham, MA?

At a citywide weighted average of 25 PPM, Oakham has relatively soft water. A water softener is generally not necessary.

Q: How many water systems serve Oakham, MA?

Oakham, Massachusetts has 19 matched water systems across 1 zip code.

Massachusetts · 1 zip codes · 19 matched water systems

25 PPM

1.5 GPG

Soft

0Soft60120180300+

Verified — Annual Water Quality Report

City avg (weighted): 25 PPM

Dataset updated March 9, 202619 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading

Worcester Dpwp, Water Supply Division

MA2348000

Water source: surface water

Serves: 206,518

USGS environmental estimate: 74 PPM

Source context

How this city reading is built

This city reading is a weighted rollup across 19 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis

19 verified treated-water sources

19 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 Oakham

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

19 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
Worcester Dpwp, Water Supply Division MA2348000	surface water	25 PPM Soft USGS estimate: 74 PPM	206,518	Verified — Annual Water Quality Report
Fitchburg Dpw Division Of Water Supply MA2097000	surface water	25 PPM Soft USGS estimate: 9 PPM	41,946	Verified — Annual Water Quality Report
Leominster Water Division MA2153000	surface water	25 PPM Soft USGS estimate: 9 PPM	41,683	Verified — Annual Water Quality Report
Shrewsbury Water Department MA2271000	groundwater	25 PPM Soft USGS estimate: 74 PPM	38,325	Verified — Annual Water Quality Report
Milford Water Department MA2185000	surface water	25 PPM Soft USGS estimate: 83 PPM	30,379	Verified — Annual Water Quality Report

Worcester Dpwp, Water Supply Division

MA2348000

Soft

25 PPMsurface water206,518 servedVerified — Annual Water Quality Report

Source water: 74 PPM

Fitchburg Dpw Division Of Water Supply

MA2097000

Soft

25 PPMsurface water41,946 servedVerified — Annual Water Quality Report

Source water: 9 PPM

Leominster Water Division

MA2153000

Soft

25 PPMsurface water41,683 servedVerified — Annual Water Quality Report

Source water: 9 PPM

Shrewsbury Water Department

MA2271000

Soft

25 PPMgroundwater38,325 servedVerified — Annual Water Quality Report

Source water: 74 PPM

Milford Water Department

MA2185000

Soft

25 PPMsurface water30,379 servedVerified — Annual Water Quality Report

Source water: 83 PPM

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

Zip Codes in Oakham, MA

0106825

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 Oakham, MA.

Submit Your Data

Frequently Asked Questions

How hard is the water in Oakham, MA?

The citywide weighted average water hardness in Oakham, MA is 25 PPM (1.5 GPG), classified as soft. This is based on 19 matched water systems.

Do I need a water softener in Oakham, MA?

At 25 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Oakham, MA 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 Oakham, MA?

Oakham, Massachusetts is served by 19 matched water systems across 1 zip code.

Learn More About Your Water

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

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