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Water Hardness in Mason Neck, VA

Virginia · 1 zip codes · 4 matched water systems

120 PPM
7 GPG
Moderately Hard
0Soft60120180300+
Verified — Annual Water Quality Report

City avg (weighted): 120 PPM

Dataset updated March 9, 20264 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading
Fairfax County Water Authority
VA6059501
Water source: surface water
Serves: 1,121,613
USGS environmental estimate: 131 PPM
Source context

How this city reading is built

This city reading is a weighted rollup across 4 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
4 verified treated-water sources
4 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 Mason Neck

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

4 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.
Fairfax County Water Authority
VA6059501
Moderately Hard
120 PPMsurface water1,121,613 servedVerified — Annual Water Quality Report
Source water: 131 PPM
Fort Belvoir
VA6059450
Moderately Hard
120 PPMsurface water39,303 servedVerified — Annual Water Quality Report
Source water: 67 PPM
Vienna, Town Of
VA6059800
Moderately Hard
120 PPMsurface water30,000 servedVerified — Annual Water Quality Report
Source water: 63 PPM
Herndon, Town Of
VA6059550
Moderately Hard
120 PPMsurface water24,601 servedVerified — Annual Water Quality Report
Source water: 131 PPM

Zip Codes in Mason Neck, VA

What This Means For You

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

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

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Frequently Asked Questions

How hard is the water in Mason Neck, VA?

The citywide weighted average water hardness in Mason Neck, VA is 120 PPM (7 GPG), classified as moderately hard. This is based on 4 matched water systems.

Do I need a water softener in Mason Neck, VA?

With a citywide average hardness of 120 PPM, a water softener is worth considering for homes in Mason Neck. Confirm your tap reading before sizing equipment.

Is hard water in Mason Neck, VA 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 Mason Neck, VA?

Mason Neck, Virginia is served by 4 matched water systems across 1 zip code.

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