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Water Hardness in 98288

Skykomish, Washington · King County

22 PPM
1.3 GPG
Soft
0Soft60120180300+
Verified — Annual Water Quality Report

Dataset updated March 9, 2026Matched to 25 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

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.

Source basis
25 verified treated-water sources
25 matched systems total for this ZIP; 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 Serving 98288

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.

25 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.
Seattle Public Utilities
WA5377050
Soft
22 PPMsurface water1,091,904 servedVerified — Annual Water Quality Report
Source water: 110 PPM
Bellevue City Of
WA5305575
Soft
22 PPMsurface water317,330 servedVerified — Annual Water Quality Report
Source water: 67 PPM
Kent Water Department
WA5338150
Soft
22 PPMsurface water166,421 servedVerified — Annual Water Quality Report
Source water: 110 PPM
Redmond Water System City Of
WA5371650
Soft
22 PPMsurface water163,335 servedVerified — Annual Water Quality Report
Source water: 67 PPM
Lakehaven Water And Sewer District
WA5341997
Soft
22 PPMsurface water118,273 servedVerified — Annual Water Quality Report
Source water: 67 PPM
Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

980688498256129822422980452298940989892599980652298251129829412

What This Means For You

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

Your Water Is Soft

Your water hardness is in the soft range. You likely don't need a water softener. Enjoy your naturally soft 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 Skykomish, WA (98288).

Submit Your Data

Frequently Asked Questions

Is the water hard in Skykomish, WA (98288)?

The average water hardness in 98288 is 22 PPM (1.3 GPG), which is classified as soft.

Do I need a water softener in 98288?

At 22 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 98288 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 98288?

Zip code 98288 in Skykomish, Washington is served by 25 water systems.

Learn More About Your Water

Water 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.

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How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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