Edmonds, WA water hardness

Tap water hardness
35mg/L
2.1gpg
Soft

Reported by Edmonds City of · May 2025

WA typical
36 mg/L
EPA health violations since 2016
0
Data
Utility report

Edmonds water measures 35 mg/L (2.1 gpg) of hardness, soft by USGS standards. The number comes from Edmonds City of, dated May 2025.

Edmonds on the hardness scale, with nearby cities
060120180240300360+WA typical 36Brier: 13 mg/LBrier 13Alderwood Manor: 13 mg/LAlderwood Manor 13North Lynnwood: 13 mg/LNorth Lynnwood 13Picnic Point: 13 mg/LPicnic Point 13Bothell West: 13 mg/LBothell West 13Martha Lake: 13 mg/LMartha Lake 13Mountlake Terrace: 14 mg/LMountlake Terrace 14Lynnwood: 15 mg/LLynnwood 15Lake Forest Park: 30 mg/LLake Forest Park 30Shoreline: 31 mg/LShoreline 31Edmonds 35mg/L as calcium carbonate060120180240300360+WA 36Brier: 13 mg/LBrier 13Alderwood Manor: 13 mg/LAlderwood. 13North Lynnwood: 13 mg/LNorth Lynn. 13Mountlake Terrace: 14 mg/LMountlake. 14Lynnwood: 15 mg/LLynnwood 15Shoreline: 31 mg/LShoreline 3135 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Edmonds sits close to the typical Washington figure of 36 mg/L. None of the 10 nearest cities we track has harder water. The range nearby runs from 13 mg/L in Brier to 31 in Shoreline.

What 35 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.

What to do about it

Nothing, as far as hardness goes. At 35 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for Edmonds's water system

Edmonds City of · PWSID WA5322500

No health-based violations since 2016

Serves about 34,065 people from surface water.

Health-based
0
Monitoring or reporting
0
Open now
0

Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.

Questions

Is Edmonds water hard?

No. It measures about 35 mg/L (2.1 grains per gallon), which the USGS classes as soft.

What is the water hardness in Edmonds in grains per gallon?

About 2.1 gpg. One grain per gallon equals 17.1 mg/L, so 35 mg/L divided by 17.1 gives 2.1.

Has the Edmonds water system had EPA violations?

EPA records show no health-based violations for Edmonds City of since 2016.

Nearby cities

All 145 cities in Washington

Hardness data: TapWaterData US Water Hardness (utility report, May 6, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.