Water Hardness in Lk Forest Park, WA

Q: Do I need a water softener in Lk Forest Park, WA?

At a citywide weighted average of 22 PPM, Lk Forest Park has relatively soft water. A water softener is generally not necessary.

Q: How many water systems serve Lk Forest Park, WA?

Lk Forest Park, Washington has 25 matched water systems across 1 zip code.

Washington · 1 zip codes · 25 matched water systems

22 PPM

1.3 GPG

Soft

0Soft60120180300+

Verified — Annual Water Quality Report

City avg (weighted): 22 PPM

Dataset updated March 9, 202625 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading

Seattle Public Utilities

WA5377050

Water source: surface water

Serves: 1,091,904

USGS environmental estimate: 110 PPM

Source context

How this city reading is built

This city reading is a weighted rollup across 25 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis

25 verified treated-water sources

25 matched systems total for this city; 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 in Lk Forest Park

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

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.

Water System	Source	Hardness	Pop. Served	Data Source
Seattle Public Utilities WA5377050	surface water	22 PPM Soft USGS estimate: 110 PPM	1,091,904	Verified — Annual Water Quality Report
Bellevue City Of WA5305575	surface water	22 PPM Soft USGS estimate: 67 PPM	317,330	Verified — Annual Water Quality Report
Kent Water Department WA5338150	surface water	22 PPM Soft USGS estimate: 110 PPM	166,421	Verified — Annual Water Quality Report
Redmond Water System City Of WA5371650	surface water	22 PPM Soft USGS estimate: 67 PPM	163,335	Verified — Annual Water Quality Report
Lakehaven Water And Sewer District WA5341997	surface water	22 PPM Soft USGS estimate: 67 PPM	118,273	Verified — Annual Water Quality Report

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.

Zip Codes in Lk Forest Park, WA

9815522

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 Lk Forest Park, WA.

Submit Your Data

Frequently Asked Questions

How hard is the water in Lk Forest Park, WA?

The citywide weighted average water hardness in Lk Forest Park, WA is 22 PPM (1.3 GPG), classified as soft. This is based on 25 matched water systems.

Do I need a water softener in Lk Forest Park, WA?

At 22 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Lk Forest Park, 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 Lk Forest Park, WA?

Lk Forest Park, Washington is served by 25 matched water systems across 1 zip code.

Learn More About Your Water

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