Water Hardness in Clearlake, WA

Q: Do I need a water softener in Clearlake, WA?

At a citywide weighted average of 45 PPM, Clearlake has relatively soft water. A water softener is generally not necessary.

Q: How many water systems serve Clearlake, WA?

Clearlake, Washington has 4 matched water systems across 2 zip codes.

Washington · 2 zip codes · 4 matched water systems

45 PPM

2.6 GPG

Soft

0Soft60120180300+

High Confidence — USGS Monitoring

Dataset updated March 9, 20264 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 4 matched water systems and 2 ZIP codes. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis

1 USGS-backed source

4 matched systems total for this city; 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 in Clearlake

These systems are matched to Clearlake, WA. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

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.

Water System	Source	Hardness	Pop. Served	Data Source
Skagit County Pud 1 Judy Res WA5379500	surface water	45 PPM Soft	111,415	Estimated — Nearby Data
Anacortes City Of WA5302200	surface water	45 PPM Soft	21,105	Estimated — Nearby Data
Hamilton Water Department WA5330700	groundwater	109 PPM Slightly Hard	540	Estimated — Nearby Data
Leif Erikson Rec Assoc WA5323735	groundwater	71 PPM Slightly Hard	320	High Confidence — USGS Monitoring

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

Hamilton Water Department

WA5330700

Slightly Hard

109 PPMgroundwater540 servedEstimated — Nearby Data

Leif Erikson Rec Assoc

WA5323735

Slightly Hard

71 PPMgroundwater320 servedHigh Confidence — USGS Monitoring

Zip Codes in Clearlake, WA

9823545 9827445

What This Means For You

Recommendations are based on the displayed 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 Clearlake, WA.

Submit Your Data

Frequently Asked Questions

How hard is the water in Clearlake, WA?

The citywide weighted average water hardness in Clearlake, WA is 45 PPM (2.6 GPG), classified as soft. This is based on 4 matched water systems.

Do I need a water softener in Clearlake, WA?

At 45 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Clearlake, WA 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 Clearlake, WA?

Clearlake, Washington is served by 4 matched water systems across 2 zip codes.

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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