Bonney Lake, WA water hardness

Tap water hardness
30mg/L
1.7gpg
SoftReports range 18–30

Reported by Tacoma Water Division City of · September 2025

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

The water in Bonney Lake carries roughly 30 mg/L of dissolved calcium and magnesium, or 1.7 grains per gallon. That is soft water. The number comes from Tacoma Water Division City of, dated September 2025. Reports for this system disagree, with values from 18 to 30 mg/L.

Bonney Lake on the hardness scale, with nearby cities
060120180240300360+WA typical 36Tehaleh: 22 mg/LTehaleh 22Orting: 22 mg/LOrting 22South Hill: 22 mg/LSouth Hill 22Puyallup: 29 mg/LPuyallup 29Prairie Ridge: 30 mg/LPrairie Ridge 30Lakeland South: 38 mg/LLakeland South 38Milton: 38 mg/LMilton 38Pacific: 39 mg/LPacific 39Auburn: 58 mg/LAuburn 58Lake Tapps: 95 mg/LLake Tapps 95Bonney Lake 30mg/L as calcium carbonate060120180240300360+WA 36Tehaleh: 22 mg/LTehaleh 22Orting: 22 mg/LOrting 22Puyallup: 29 mg/LPuyallup 29Prairie Ridge: 30 mg/LPrairie Ri. 30Pacific: 39 mg/LPacific 39Lake Tapps: 95 mg/LLake Tapps 9530 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Bonney Lake sits close to the typical Washington figure of 36 mg/L. Of the 10 nearest cities we track, 4 have softer water and 5 have harder. The range nearby runs from 22 mg/L in Tehaleh to 95 in Lake Tapps.

What 30 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 30 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 Bonney Lake's water system

Bonney Lake Water Department City · PWSID WA5307650

No health-based violations since 2016

Serves about 43,371 people from surface water.

Health-based
0
Monitoring or reporting
4
Open now
0

EPA lists Bonney Lake Water Department City as the system serving Bonney Lake. The hardness figure above comes from a different system's report, which TapWaterData uses for Bonney Lake.

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 Bonney Lake water hard?

No. It measures about 30 mg/L (1.7 grains per gallon), which the USGS classes as soft.

What is the water hardness in Bonney Lake in grains per gallon?

About 1.7 gpg. One grain per gallon equals 17.1 mg/L, so 30 mg/L divided by 17.1 gives 1.7.

Has the Bonney Lake water system had EPA violations?

EPA records show no health-based violations for Bonney Lake Water Department City since 2016. There were also 4 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 145 cities in Washington

Hardness data: TapWaterData US Water Hardness (utility report, September 22, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.