WH

Water Hardness in 22180

Vienna, Virginia · Fairfax County

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

Dataset updated March 9, 2026Matched to 4 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 4 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis
4 verified treated-water sources
4 matched systems total for this ZIP; 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 Serving 22180

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

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

Nearby Zip Codes

220271202218112022031120221821202204312022124120220421202204612022102120222131222200312020191120

What This Means For You

Use this ZIP 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.

MethodologyData sourcesHow 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 Vienna, VA (22180).

Submit Your Data

Frequently Asked Questions

Is the water hard in Vienna, VA (22180)?

The average water hardness in 22180 is 120 PPM (7 GPG), which is classified as moderately hard.

Do I need a water softener in 22180?

With hardness of 120 PPM, a water softener is worth considering for homes in 22180.

Is hard water in 22180 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 22180?

Zip code 22180 in Vienna, Virginia is served by 4 water systems.

Learn More About Your Water

How to Test Water Hardness at Home

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

8 min read

Hard Water vs Soft Water: Key Differences

Compare hard water and soft water by minerals, taste, soap lather, skin, hair, plumbing, and treatment needs.

10 min read

PPM to GPG Converter + Water Hardness Scale Explained

Convert between PPM and GPG instantly. Understand the USGS water hardness scale and what your numbers mean for your home.

5 min read