Water Hardness in 98855
Tonasket, Washington · Okanogan County
Dataset updated March 9, 2026Matched to 25 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 25 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 98855
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 |
|---|---|---|---|
| Tonasket Water System WA5388700 | groundwater | 129 PPM Moderately Hard | |
| Inchelium Water District WA5335550 | groundwater | 129 PPM Moderately Hard | |
| Corral Springs Water System WA5351714 | groundwater | 129 PPM Moderately Hard | |
| Progressive Flat Water Assn WA5369650 | groundwater | 129 PPM Moderately Hard | |
| Crane Ranch WA5315818 | groundwater | 129 PPM Moderately Hard |
Nearby Zip Codes
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.
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 Tonasket, WA (98855).
Frequently Asked Questions
Is the water hard in Tonasket, WA (98855)?
Our estimate for 98855 is 129 PPM (7.5 GPG), but it is based on nearby, county, or state-level data rather than a direct treated tap-water report for this exact location. Confirm with your utility or a home test.
Do I need a water softener in 98855?
Do not size a softener from this estimate alone. Confirm the actual tap-water hardness before choosing treatment equipment.
Is hard water in 98855 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 98855?
Zip code 98855 in Tonasket, Washington is served by 25 water systems.
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