General guidelines for classification of waters are as follows: 0 to 17 mg/L as calcium carbonate is classified as soft; 17.1-60 mg/L as slightly hard; 61 to 120 mg/L as moderately hard; 121 to 180 mg/L as hard; and more than 180 mg/L as very hard.  

Our water is moderately hard in the East and West Systems and hard in Bull Run Mountain/Evergreen. For more information, visit our 'Water Hardness Information' page.