Water Hardness in Bethesda, MD
Maryland · 2 zip codes · 3 matched water systems
City avg (weighted): 120 PPM
Dataset updated March 9, 20263 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology
Is Bethesda, MD Water Hard or Soft?
The displayed hardness for Bethesda, MD is 120 PPM (7 GPG) from Washington Suburban Sanitary Commission, classified as moderately hard. The citywide weighted average is 120 PPM.
Water hardness is not a drinking-water safety score. It measures calcium and magnesium minerals, and address-level results can shift by pressure zone, supply blend, building plumbing, or private well.
How this city reading is built
This city reading is a weighted rollup across 3 matched water systems and 2 ZIP codes. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.
Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.
Water Systems in Bethesda
These systems are matched to Bethesda, MD. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
| Washington Suburban Sanitary Commission MD0150005 | surface water | 120 PPM Moderately HardUSGS estimate: 151 PPM | |
| City Of Rockville MD0150003 | surface water | 120 PPM Moderately HardUSGS estimate: 151 PPM | |
| Granite Mobile Home Park MD0030204 | groundwater | 166 PPM Moderately Hard |
Zip Codes in Bethesda, MD
What This Means For You
Use this city reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
Know your water hardness?
If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Bethesda, MD.
Frequently Asked Questions
How hard is the water in Bethesda, MD?
The citywide weighted average water hardness in Bethesda, MD is 120 PPM (7 GPG), classified as moderately hard. This is based on 3 matched water systems.
Do I need a water softener in Bethesda, MD?
With a citywide average hardness of 120 PPM, a water softener is worth considering for homes in Bethesda. Confirm your tap reading before sizing equipment.
Is hard water in Bethesda, MD safe to drink?
Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.
How many water systems serve Bethesda, MD?
Bethesda, Maryland is served by 3 matched water systems across 2 zip codes.
Learn More About Your Water
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