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Water Hardness in 98284

Sedro Woolley, Washington · Skagit County

45 PPM
2.6 GPG
Soft
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 2026Matched to 4 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 4 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
1 USGS-backed source
4 matched systems total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.
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 98284

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.

4 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.
Skagit County Pud 1 Judy Res
WA5379500
Soft
45 PPMsurface water111,415 servedEstimated — Nearby Data
Anacortes City Of
WA5302200
Soft
45 PPMsurface water21,105 servedEstimated — Nearby Data
Glenhaven Lakes Club
WA5328050
Soft
45 PPMgroundwater1,780 servedHigh Confidence — USGS Monitoring
Hamilton Water Department
WA5330700
Slightly Hard
109 PPMgroundwater540 servedEstimated — Nearby Data

Nearby Zip Codes

982354598220249823345982744598232469827355982384598244259825745982374598226249829212

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 Sedro Woolley, WA (98284).

Submit Your Data

Frequently Asked Questions

Is the water hard in Sedro Woolley, WA (98284)?

The average water hardness in 98284 is 45 PPM (2.6 GPG), which is classified as soft.

Do I need a water softener in 98284?

At 45 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 98284 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 98284?

Zip code 98284 in Sedro Woolley, Washington is served by 4 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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