Interpreting Your Water Test Report
Blake Ross, Kathleen Parrott
Virginia Cooperative Extension
Virginia Cooperative Extension
| Concentration of Hardness | ||
|---|---|---|
| In
Grains per Gallon (gpg) | In
Milligrams per Liter (mg/L) | Relative
Hardness Level |
| Below 3.5 | Below 60 | Soft |
| 3.5 to 7.0 | 60 to 120 | Moderately Hard |
| 7.0 to 10.5 | 120 to 180 | Hard |
| 10.5 and above | 180 and above | Very Hard |
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Publication #: 356-489
Disclaimer and Reproduction Information: Information in NASD does not represent NIOSH policy. Information included in NASD appears by permission of the author and/or copyright holder. More
Reviewed for NASD: 04/2002