Where does the water in 98563 come from?

Water for zip code 98563 in Montesano, Washington is provided by 11 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 98563

Q: Is the water hard in Montesano, WA (98563)?

The average water hardness in 98563 is 41 PPM (2.4 GPG), which is classified as soft. No water treatment is typically needed.

Q: Do I need a water softener in 98563?

At 41 PPM, your water is relatively soft. A water softener is generally not necessary, though some homeowners prefer the feel of softened water.

Montesano, Washington · Grays Harbor County

41 PPM

2.4 GPG

Soft

0Soft60120180300+

Estimated — Nearby Data

Dataset updated March 9, 2026Matched to 11 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 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.

Source basis

11 estimated sources

This ZIP reading needs local confirmation before equipment sizing or purchase decisions.

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 98563

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.

11 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.

Water System	Source	Hardness	Pop. Served	Data Source
Aberdeen City Of WA5300050	surface water	32 PPM Soft	17,958	Estimated — Nearby Data
Hoquiam Water Department WA5334350	surface water	32 PPM Soft	11,456	Estimated — Nearby Data
Montesano City Of WA5356000	groundwater	58 PPM Soft	5,492	Estimated — Nearby Data
Grays Harbor Co Water Dist 2 WA5329250	groundwater	58 PPM Soft	5,112	Estimated — Nearby Data
Pacific Beach/Moclips WA5300333	groundwater	58 PPM Soft	2,372	Estimated — Nearby Data

Aberdeen City Of

WA5300050

Soft

32 PPMsurface water17,958 servedEstimated — Nearby Data

Hoquiam Water Department

WA5334350

Soft

32 PPMsurface water11,456 servedEstimated — Nearby Data

Montesano City Of

WA5356000

Soft

58 PPMgroundwater5,492 servedEstimated — Nearby Data

Grays Harbor Co Water Dist 2

WA5329250

Soft

58 PPMgroundwater5,112 servedEstimated — Nearby Data

Pacific Beach/Moclips

WA5300333

Soft

58 PPMgroundwater2,372 servedEstimated — Nearby Data

Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

9856049 9854137 9855038 9852032 9855232 9857533 9855734 9855932 9858449 9852632 9856833 9854846

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 Montesano, WA (98563).

Submit Your Data

Frequently Asked Questions

Is the water hard in Montesano, WA (98563)?

Our estimate for 98563 is 41 PPM (2.4 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 98563?

Do not size a softener from this estimate alone. Confirm the actual tap-water hardness before choosing treatment equipment.

Is hard water in 98563 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 98563?

Zip code 98563 in Montesano, Washington is served by 11 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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