Snoqualmie, WA water hardness

Tap water hardness
41mg/L
2.4gpg
Soft

Reported by Snoqualmie Water · August 2025

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

Snoqualmie water measures 41 mg/L (2.4 gpg) of hardness, soft by USGS standards. The number comes from Snoqualmie Water, dated August 2025.

Snoqualmie on the hardness scale, with nearby cities
060120180240300360+WA typical 36Duvall: 21 mg/LDuvall 21Newcastle: 27 mg/LNewcastle 27East Renton Highlands: 30 mg/LEast Renton Highlands 30Bellevue: 34 mg/LBellevue 34North Bend: 41 mg/LNorth Bend 41Issaquah: 41 mg/LIssaquah 41Maple Valley: 46 mg/LMaple Valley 46Union Hill-Novelty Hill: 50 mg/LUnion Hill-Novelty Hill 50Fairwood: 53 mg/LFairwood 53Sammamish: 62 mg/LSammamish 62Snoqualmie 41mg/L as calcium carbonate060120180240300360+WA 36Newcastle: 27 mg/LNewcastle 27East Renton Highlands: 30 mg/LEast Rento. 30North Bend: 41 mg/LNorth Bend 41Issaquah: 41 mg/LIssaquah 41Union Hill-Novelty Hill: 50 mg/LUnion Hill. 50Sammamish: 62 mg/LSammamish 6241 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 41 mg/L, Snoqualmie is close to the typical Washington figure of 36 mg/L. Of the 10 nearest cities we track, 4 have softer water and 4 have harder. The range nearby runs from 21 mg/L in Duvall to 62 in Sammamish.

What 41 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 41 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 Snoqualmie's water system

Snoqualmie Water · PWSID WA5381080

No health-based violations since 2016

Serves about 20,222 people from groundwater.

Health-based
0
Monitoring or reporting
1
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 Snoqualmie water hard?

No. It measures about 41 mg/L (2.4 grains per gallon), which the USGS classes as soft.

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

About 2.4 gpg. One grain per gallon equals 17.1 mg/L, so 41 mg/L divided by 17.1 gives 2.4.

Has the Snoqualmie water system had EPA violations?

EPA records show no health-based violations for Snoqualmie Water since 2016. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.

Nearby cities

All 145 cities in Washington

Hardness data: TapWaterData US Water Hardness (utility report, August 18, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.