Water Hardness in Terrace Heights, WA
Washington · 1 zip codes · 15 matched water systems
City avg (weighted): 85 PPM
Dataset updated March 9, 202615 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology
Is Terrace Heights, WA Water Hard or Soft?
The displayed hardness for Terrace Heights, WA is 87 PPM (5.1 GPG) from Yakima Water Division City Of, classified as slightly hard. The citywide weighted average is 85 PPM.
Water hardness is not a drinking-water safety score. It measures calcium and magnesium minerals, and address-level results can shift by pressure zone, supply blend, building plumbing, or private well.
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.
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.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
| Yakima Water Division City Of WA5399150 | surface water | 87 PPM Slightly HardUSGS estimate: 47 PPM | |
| Nob Hill Water Association WA5359700 | groundwater | 87 PPM Slightly HardUSGS estimate: 47 PPM | |
| Sunnyside City Of WA5385400 | groundwater | 87 PPM Slightly HardUSGS estimate: 335 PPM | |
| Selah City Of WA5377400 | groundwater | 87 PPM Slightly HardUSGS estimate: 89 PPM | |
| Grandview City Of WA5328970 | groundwater | 87 PPM Slightly HardUSGS estimate: 338 PPM |
Zip Codes in Terrace Heights, WA
What This Means For You
Use this city 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.
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.
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.
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 readWater Hardness Scale: PPM and GPG Chart
Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.
10 min readTDS vs Water Hardness: What's the Difference?
TDS and water hardness measure different things. Learn why a TDS meter can't tell you if your water is hard, and which test you actually need.
7 min read