Water hardness in District of Columbia
Typical District of Columbia tap water
117mg/L
6.8gpg
Moderately hard
Population-weighted middle value across 1 District of Columbia cities in the dataset
- People with hard or very hard water
- 0%
- Hardest
- Washington 117
- Softest
- Washington 117
We have hardness numbers for 1 District of Columbia city. Each city page adds the water system's EPA violation record and a softener size for a typical household.
0Soft
1Moderately hard
0Hard
0Very hard
All cities in District of Columbia
| City | mg/L | gpg | Class | Data | EPA health violations |
|---|---|---|---|---|---|
| Washington | 117 | 6.8 | Moderately hard | Utility report | 0 |
Other states
- Alabama73
- Alaska110
- Arizona180
- Arkansas39
- California121
- Colorado97
- Connecticut53
- Delaware87
- Florida120
- Georgia28
- Hawaii55
- Idaho118
- Illinois139
- Indiana178
- Iowa183
- Kansas138
- Kentucky134
- Louisiana102
- Maine16
- Maryland105
- Massachusetts38
- Michigan112
- Minnesota160
- Mississippi38
- Missouri121
- Montana116
- Nebraska149
- Nevada232
- New Hampshire20
- New Jersey80
- New Mexico137
- New York31
- North Carolina31
- North Dakota133
- Ohio113
- Oklahoma152
- Oregon24
- Pennsylvania127
- Rhode Island42
- South Carolina32
- South Dakota124
- Tennessee89
- Texas112
- Utah231
- Vermont62
- Virginia65
- Washington36
- West Virginia106
- Wisconsin170
- Wyoming191
Hardness data: TapWaterData US Water Hardness, CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.