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Water Hardness in Lake Dallas, TX

Texas · 1 zip codes · 17 matched water systems

115 PPM
6.7 GPG
Slightly Hard
0Soft60120180300+
Verified — Annual Water Quality Report

City avg (weighted): 115 PPM

Dataset updated March 9, 202617 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading
City Of Denton
TX0610002
Water source: surface water
Serves: 150,037
USGS environmental estimate: 111 PPM
Source context

How this city reading is built

This city reading is a weighted rollup across 17 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
16 verified treated-water sources
17 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 Lake Dallas

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

17 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.
City Of Denton
TX0610002
Slightly Hard
115 PPMsurface water150,037 servedVerified — Annual Water Quality Report
Source water: 111 PPM
City Of Lewisville
TX0610004
Slightly Hard
115 PPMsurface water140,880 servedVerified — Annual Water Quality Report
Source water: 127 PPM
Mustang Sud
TX0610036
Slightly Hard
115 PPMsurface water110,826 servedVerified — Annual Water Quality Report
Source water: 111 PPM
Town Of Flower Mound
TX0610023
Slightly Hard
115 PPMsurface water80,000 servedVerified — Annual Water Quality Report
Source water: 127 PPM
City Of The Colony
TX0610081
Slightly Hard
115 PPMsurface water45,367 servedVerified — Annual Water Quality Report
Source water: 127 PPM
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Lake Dallas, TX

What This Means For You

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

Slightly Hard Water

Your water is slightly hard. You may notice minor spotting on dishes or a slight film on faucets. A water softener is optional but can improve water quality.

Recommended Products

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | How 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 Lake Dallas, TX.

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Frequently Asked Questions

How hard is the water in Lake Dallas, TX?

The citywide weighted average water hardness in Lake Dallas, TX is 115 PPM (6.7 GPG), classified as slightly hard. This is based on 17 matched water systems.

Do I need a water softener in Lake Dallas, TX?

At 115 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Lake Dallas, TX 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 Lake Dallas, TX?

Lake Dallas, Texas is served by 17 matched water systems across 1 zip code.

Learn More About Your Water