Water Hardness in District of Columbia
1 counties — Average 111 PPM (Moderately Hard)
District of Columbia Water Hardness Map
Soft Moderate Hard Very Hard
District of Columbia
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All 1 Counties — By Water Hardness
Source: USGS Water Quality Portal
Frequently Asked Questions
How hard is the water in District of Columbia?
District of Columbia has an average water hardness of 111 PPM, classified as moderately hard. Out of 1 counties, 0 have soft water, 1 moderately hard, 0 hard, and 0 very hard.
Which District of Columbia counties have the hardest water?
See the county table above for a complete breakdown by hardness level.
How do I check water hardness for my District of Columbia address?
Enter your ZIP code in the search box above to see your area's estimated water hardness, classification, and water utility information.