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Water Hardness in Terrace Heights, WA

Washington · 1 zip codes · 15 matched water systems

87 PPM
5.1 GPG
Slightly Hard
0Soft60120180300+
Verified — Annual Water Quality Report

City avg (weighted): 85 PPM

Dataset updated March 9, 202615 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading
Yakima Water Division City Of
WA5399150
Water source: surface water
Serves: 112,858
USGS environmental estimate: 47 PPM
Source context

How this city reading is built

This city reading is a weighted rollup across 15 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
5 verified treated-water sources
15 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 Terrace Heights

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

15 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.
Yakima Water Division City Of
WA5399150
Slightly Hard
87 PPMsurface water112,858 servedVerified — Annual Water Quality Report
Source water: 47 PPM
Nob Hill Water Association
WA5359700
Slightly Hard
87 PPMgroundwater36,026 servedVerified — Annual Water Quality Report
Source water: 47 PPM
Sunnyside City Of
WA5385400
Slightly Hard
87 PPMgroundwater17,037 servedVerified — Annual Water Quality Report
Source water: 335 PPM
Selah City Of
WA5377400
Slightly Hard
87 PPMgroundwater12,515 servedVerified — Annual Water Quality Report
Source water: 89 PPM
Grandview City Of
WA5328970
Slightly Hard
87 PPMgroundwater11,010 servedVerified — Annual Water Quality Report
Source water: 338 PPM
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Terrace Heights, WA

9890185

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

Water Hardness Test Kit
Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)
Salt-Free Water Conditioner
Our PickSpringWell Salt-Free Cartridge

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 Terrace Heights, WA.

Submit Your Data

Frequently Asked Questions

How hard is the water in Terrace Heights, WA?

The citywide weighted average water hardness in Terrace Heights, WA is 85 PPM (5 GPG), classified as slightly hard. This is based on 15 matched water systems. The gauge highlights Yakima Water Division City Of, a verified treated-water system, because individual systems can differ from the citywide average.

Do I need a water softener in Terrace Heights, WA?

At 85 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Terrace Heights, WA 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 Terrace Heights, WA?

Terrace Heights, Washington is served by 15 matched water systems across 1 zip code.

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