Waldorf, MD water hardness

Tap water hardness
31mg/L
1.8gpg
SoftCounty estimate

County estimate from 63 water samples in Charles County · July 2026

MD typical
105 mg/L
Data
County estimate

Water samples from around Waldorf put hardness at about 31 mg/L (1.8 gpg), which would be soft on the USGS scale. Treat this as a rough guide: it is the median of 63 samples taken across Charles County, mostly wells and streams, not a test of Waldorf's treated tap water.

Waldorf on the hardness scale, with nearby cities
060120180240300360+MD typical 105Fort Meade: 4 mg/LFort Meade 4Severna Park: 35 mg/LSeverna Park 35Columbia: 74 mg/LColumbia 74Crofton: 77 mg/LCrofton 77Odenton: 77 mg/LOdenton 77Fairwood: 78 mg/LFairwood 78Bowie: 78 mg/LBowie 78Poolesville: 84 mg/LPoolesville 84Takoma Park: 110 mg/LTakoma Park 110Chesapeake Beach: 130 mg/LChesapeake Beach 130Waldorf 31mg/L as calcium carbonate060120180240300360+MD 105Crofton: 77 mg/LCrofton 77Odenton: 77 mg/LOdenton 77Fairwood: 78 mg/LFairwood 78Bowie: 78 mg/LBowie 78Takoma Park: 110 mg/LTakoma Park 110Chesapeake Beach: 130 mg/LChesapeake. 13031 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Waldorf sits 74 mg/L below the typical Maryland figure of 105. Of the 10 nearest cities we track, 1 has softer water and 9 have harder. The range nearby runs from 4 mg/L in Fort Meade to 130 in Chesapeake Beach.

What 31 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 31 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 Waldorf's water system

We could not match Waldorf to a community water system in EPA's records. Your water bill or the yearly Consumer Confidence Report names the system and its ID.

Questions

Is Waldorf water hard?

No. It measures about 31 mg/L (1.8 grains per gallon), which the USGS classes as soft.

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

About 1.8 gpg. One grain per gallon equals 17.1 mg/L, so 31 mg/L divided by 17.1 gives 1.8.

Nearby cities

All 24 cities in Maryland

Hardness data: TapWaterData US Water Hardness (county estimate, July 4, 2026), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.