Water Hardness in 99006
Deer Park, Washington · Spokane County
Dataset updated March 9, 2026Matched to 11 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 11 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.
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 99006
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.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
Spokane City Of WA5383100 | groundwater | 218 PPM HardUSGS estimate: 181 PPM | |
Whitworth Water District 2 WA5396601 | groundwater | 218 PPM HardUSGS estimate: 181 PPM | |
Vera Water & Power WA5391450 | groundwater | 218 PPM HardUSGS estimate: 181 PPM | |
Consolidated Irrig Dist 19 System 2 WA5310221 | groundwater | 218 PPM HardUSGS estimate: 94 PPM | |
Spo Co Water Dist 3 Sys 1 WA5393351 | groundwater | 218 PPM HardUSGS estimate: 181 PPM |
Nearby Zip Codes
What This Means For You
Recommendations are based on the displayed ZIP hardness reading. Confirm your tap reading before sizing or buying treatment equipment.
Hard Water - Treatment Recommended
Your water is hard. Scale buildup is likely affecting your plumbing and appliances, reducing their lifespan and efficiency. A water softener is recommended to protect your home.
Recommended Products
Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | 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 Deer Park, WA (99006).
Frequently Asked Questions
Is the water hard in Deer Park, WA (99006)?
The average water hardness in 99006 is 218 PPM (12.7 GPG), which is classified as hard.
Do I need a water softener in 99006?
With hardness of 218 PPM, a water softener is recommended for homes in 99006.
Is hard water in 99006 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 99006?
Zip code 99006 in Deer Park, Washington is served by 11 water systems.
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