Hard water in Towson, MD

Tap water hardness
216mg/L
12.6gpg
Very hardCounty estimate

County estimate from 674 water samples in Baltimore County · July 2026

MD typical
105 mg/L
Softener for 3 people
24k grain
Data
County estimate

Water samples from around Towson put hardness at about 216 mg/L (12.6 gpg), which would be very hard on the USGS scale. Treat this as a rough guide: it is the median of 674 samples taken across Baltimore County, mostly wells and streams, not a test of Towson's treated tap water.

Towson on the hardness scale, with nearby cities
060120180240300360+MD typical 105Fort Meade: 4 mg/LFort Meade 4Severna Park: 35 mg/LSeverna Park 35Westminster: 62 mg/LWestminster 62Columbia: 74 mg/LColumbia 74Odenton: 77 mg/LOdenton 77Crofton: 77 mg/LCrofton 77Bel Air: 81 mg/LBel Air 81Bel Air South: 81 mg/LBel Air South 81Ellicott City: 82 mg/LEllicott City 82Baltimore: 169 mg/LBaltimore 169Towson 216mg/L as calcium carbonate060120180240300360+MD 105Fort Meade: 4 mg/LFort Meade 4Columbia: 74 mg/LColumbia 74Bel Air: 81 mg/LBel Air 81Bel Air South: 81 mg/LBel Air So. 81Ellicott City: 82 mg/LEllicott C. 82Baltimore: 169 mg/LBaltimore 169216 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Towson sits 111 mg/L above the typical Maryland figure of 105. None of the 10 nearest cities we track has harder water. The range nearby runs from 4 mg/L in Fort Meade to 169 in Baltimore.

What 216 mg/L means at home

Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.

Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.

Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.

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

At 216 mg/L most of the trouble is scale, and only a few things deal with it.

Ion-exchange water softener

The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.

Salt-free conditioner

No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.

Reverse osmosis or carbon filter

Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.

Softener size for Towson

3 people × 75 gallons a day × 12.6 gpg = 2,842 grains a day. A 24,000-grain unit regenerates about every 8 days.

Size it for your household

EPA record for Towson's water system

We could not match Towson 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 Towson water hard?

Yes. It measures about 216 mg/L (12.6 grains per gallon), which the USGS classes as very hard.

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

About 12.6 gpg. One grain per gallon equals 17.1 mg/L, so 216 mg/L divided by 17.1 gives 12.6.

What size water softener do I need in Towson?

For 3 people using 75 gallons each per day, 12.6 gpg works out to about 2,842 grains a day. A 24,000-grain softener covers that with a regeneration about every 8 days.

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.