Aquatell

Maryland

The 5 hardness figures we’ve verified run from 3.5 to 11 grains per gallon, with a median of 5.0; 25% are hard or very hard.

How the 4 figures spread across the bands

  • Soft 0
  • Slightly hard 0
  • Moderately hard 3
  • Hard 0
  • Very hard 1
  • 1 published as a range across bands
Hardness
5.0 gpg medianAverage 6.2 gpg (106 ppm), from 3.5 to 11. Each published figure counts once in the average, median and spread; a figure published as a range is shown as its range and isn't averaged.
Coverage
8 places8 listings as published
Disinfectant
5 of 5use chloramine; 0 use chlorine

Every place we have

Sources are each city’s water quality report or its utility. Gather the listings up by place or by the water system that serves them, or see every listing as published; open a group to see what’s in it.

8 places

On the scaleDisinfectantSourcesAsk Aqua
Baltimore
2 notes
  • The page it came from links no primary source for this figure.
  • Another Aquatell page gives chlorine; this table's figure is kept.
 11 gpg185 ppm, very hard Chloramine Disinfectant
Columbia
2 notes
  • Published as a range, 60 to 185 ppm (3.5 to 10.8 gpg): shown as a range and left out of averages.
  • The page it came from links no primary source for this figure.
 3.5–11 gpg60–185 ppm, moderately hard to very hard Chloramine Disinfectant
Frederick
No source linked
  • The page it came from links no primary source for this figure.
 6.0 gpg101 ppm, moderately hard –
Annapolis
No source linked
  • The page it came from links no primary source for this figure.
 4.0 gpg70 ppm, moderately hard –
Gaithersburg
No source linked
  • The page it came from links no primary source for this figure.
 4.0 gpg71 ppm, moderately hard –
Germantown
 – Chloramine Disinfectant
Silver Spring
 – Chloramine Disinfectant
Waldorf
 – Chloramine Disinfectant

Missing your city? Aquatell researches cities on request from the utility’s own reports, usually within a week. A note on a figure says what we found when we checked it: units that didn’t agree, another page with a different figure, a range.

What to do about it

Hard water

Above about 3.5 grains per gallon, scale builds in water heaters, fixtures and appliances. A softener sized for your hardness and household removes it for the whole house.

Water softenersSizing a softener

Chlorine or chloramine

Standard carbon removes chlorine’s taste and smell. Chloramine lasts longer in the pipes and needs catalytic carbon to remove it.

Carbon and chloramine filters

Not sure what you need?

Aqua knows these figures and Aquatell’s treatment charts, and can size a system for your home.

Softeners for Maryland’s water

See them all