Hard water in Martinsburg, WV

Tap water hardness
387mg/L
22.6gpg
Very hard

Reported by Berkeley CO P S W D-Bunker Hill · July 2025

WV typical
106 mg/L
EPA health violations since 2016
0
Softener for 3 people
48k grain
Data
Utility report

Tap water in Martinsburg has about 387 mg/L of hardness, which is 22.6 grains per gallon. On the USGS scale that counts as very hard. The number comes from Berkeley CO P S W D-Bunker Hill, dated July 2025.

Martinsburg on the hardness scale, with nearby cities
060120180240300360+WV typical 106Fairmont: 55 mg/LFairmont 55Cheat Lake: 91 mg/LCheat Lake 91Brookhaven: 91 mg/LBrookhaven 91Clarksburg: 104 mg/LClarksburg 104Wheeling: 106 mg/LWheeling 106Parkersburg: 114 mg/LParkersburg 114Bridgeport: 122 mg/LBridgeport 122Morgantown: 123 mg/LMorgantown 123Charles: 158 mg/LCharles 158New Martinsville: 228 mg/LNew Martinsville 228Martinsburg 387off the scalemg/L as calcium carbonate060120180240300360+WV 106Fairmont: 55 mg/LFairmont 55Cheat Lake: 91 mg/LCheat Lake 91Brookhaven: 91 mg/LBrookhaven 91Bridgeport: 122 mg/LBridgeport 122Morgantown: 123 mg/LMorgantown 123Charles: 158 mg/LCharles 158387 mg/Loff the scalemg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Martinsburg sits 281 mg/L above the typical West Virginia figure of 106. None of the 10 nearest cities we track has harder water. The range nearby runs from 55 mg/L in Fairmont to 228 in New Martinsville.

What 387 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 387 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 Martinsburg

3 people × 75 gallons a day × 22.6 gpg = 5,092 grains a day. A 48,000-grain unit regenerates about every 9 days.

Size it for your household

EPA record for Martinsburg's water system

Berkeley CO P S W D-Bunker Hill · PWSID WV3300202

No health-based violations since 2016

Serves about 0 people from surface water. EPA lists this system as inactive.

Health-based
0
Monitoring or reporting
30
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 Martinsburg water hard?

Yes. It measures about 387 mg/L (22.6 grains per gallon), which the USGS classes as very hard.

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

About 22.6 gpg. One grain per gallon equals 17.1 mg/L, so 387 mg/L divided by 17.1 gives 22.6.

What size water softener do I need in Martinsburg?

For 3 people using 75 gallons each per day, 22.6 gpg works out to about 5,092 grains a day. A 48,000-grain softener covers that with a regeneration about every 9 days.

Has the Martinsburg water system had EPA violations?

EPA records show no health-based violations for Berkeley CO P S W D-Bunker Hill since 2016. There were also 30 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 14 cities in West Virginia

Hardness data: TapWaterData US Water Hardness (utility report, July 30, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.