Water hardness in Colorado
Typical Colorado tap water
97mg/L
5.7gpg
Moderately hard
Population-weighted middle value across 87 Colorado cities in the dataset
We have hardness numbers for 64 Colorado cities; 2 of them are county estimates rather than utility figures. Each city page adds the water system's EPA violation record and a softener size for a typical household.
Dot size follows population. Tap a dot for the city page.
16Soft
34Moderately hard
6Hard
8Very hard
Hardest water in Colorado
- Evans415
- Firestone415
- Security-Widefield335
- Fountain335
- Fort Carson335
- Eagle226
- Wellington218
- Brighton202
Softest water in Colorado
- Longmont20
- Loveland28
- Windsor31
- Louisville32
- Erie33
- Mead36
- Berthoud36
- Cimarron Hills36
All cities in Colorado
| City | mg/L | gpg | Class | Data | EPA health violations |
|---|---|---|---|---|---|
| Denver | 97 | 5.7 | Moderately hard | Utility report | 0 |
| Colorado Springs | 36 | 2.1 | Soft | Utility report | 0 |
| Aurora | 100 | 5.8 | Moderately hard | Utility report | 0 |
| Fort Collins | 42 | 2.5 | Soft | Utility report | 1 |
| Lakewood | 97 | 5.7 | Moderately hard | Utility report | 0 |
| Thornton | 98 | 5.8 | Moderately hard | Utility report | 0 |
| Arvada | 93 | 5.5 | Moderately hard | Utility report | 0 |
| Westminster | 100 | 5.8 | Moderately hard | Utility report | 0 |
| Greeley | 37 | 2.1 | Soft | Utility report | 0 |
| Pueblo | 139 | 8.1 | Hard | Utility report | 0 |
| Centennial | 96 | 5.6 | Moderately hard | Utility report | 0 |
| Boulder | 41 | 2.4 | Soft | Utility report | 2 |
| Longmont | 20 | 1.2 | Soft | Utility report | 0 |
| Loveland | 28 | 1.6 | Soft | Utility report | 0 |
| Broomfield | 46 | 2.7 | Soft | Utility report | 2 |
| Commerce City | 95 | 5.6 | Moderately hard | Utility report | 0 |
| Grand Junction | 110 | 6.4 | Moderately hard | Utility report | 0 |
| Littleton | 97 | 5.7 | Moderately hard | Utility report | 0 |
| Brighton | 202 | 11.8 | Very hard | Utility report | 1 |
| Windsor | 31 | 1.8 | Soft | Utility report | 0 |
| Erie | 33 | 1.9 | Soft | Utility report | 0 |
| Northglenn | 118 | 6.9 | Moderately hard | Utility report | 0 |
| Security-Widefield | 335 | 19.6 | Very hard | Utility report | 1 |
| Englewood | 101 | 5.9 | Moderately hard | Utility report | 1 |
| Pueblo West | 169 | 9.9 | Hard | Utility report | 3 |
| Wheat Ridge | 96 | 5.6 | Moderately hard | Utility report | 1 |
| Lafayette | 91 | 5.3 | Moderately hard | Utility report | 0 |
| Fountain | 335 | 19.6 | Very hard | Utility report | 0 |
| Evans | 415 | 24.3 | Very hard | County estimate | 0 |
| Johnstown | 59 | 3.4 | Soft | Utility report | 2 |
| Four Square Mile | 96 | 5.6 | Moderately hard | Utility report | 0 |
| Montrose | 111 | 6.5 | Moderately hard | Utility report | 0 |
| Louisville | 32 | 1.9 | Soft | Utility report | 2 |
| Firestone | 415 | 24.3 | Very hard | County estimate | 0 |
| Clifton | 110 | 6.4 | Moderately hard | Utility report | 1 |
| Sherrelwood | 100 | 5.8 | Moderately hard | Utility report | 0 |
| Cimarron Hills | 36 | 2.1 | Soft | Utility report | 0 |
| Fort Carson | 335 | 19.6 | Very hard | Utility report | 1 |
| Cañon City | 132 | 7.7 | Hard | Utility report | 0 |
| Welby | 96 | 5.6 | Moderately hard | Utility report | 0 |
| Greenwood Village | 96 | 5.6 | Moderately hard | Utility report | 0 |
| Berthoud | 36 | 2.1 | Soft | Utility report | 0 |
| Federal Heights | 119 | 7.0 | Moderately hard | Utility report | 0 |
| Steamboat Springs | 64 | 3.7 | Moderately hard | Utility report | 0 |
| Wellington | 218 | 12.8 | Very hard | Utility report | 3 |
| Timnath | 41 | 2.4 | Soft | Utility report | 0 |
| Cherry Creek | 96 | 5.6 | Moderately hard | Utility report | 0 |
| Berkley | 96 | 5.6 | Moderately hard | Utility report | 0 |
| Redlands | 110 | 6.4 | Moderately hard | Utility report | 0 |
| Derby | 79 | 4.6 | Moderately hard | Utility report | 0 |
| Twin Lakes | 99 | 5.8 | Moderately hard | Utility report | 0 |
| Fruitvale | 110 | 6.4 | Moderately hard | Utility report | 0 |
| Eagle | 226 | 13.2 | Very hard | Utility report | 0 |
| Mead | 36 | 2.1 | Soft | Utility report | 0 |
| Orchard Mesa | 110 | 6.4 | Moderately hard | Utility report | 0 |
| Aspen | 168 | 9.8 | Hard | Utility report | 0 |
| Stratmoor | 50 | 2.9 | Soft | Utility report | 0 |
| Cherry Hills Village | 96 | 5.6 | Moderately hard | Utility report | 0 |
| Salida | 143 | 8.4 | Hard | Utility report | 0 |
| Sheridan | 101 | 5.9 | Moderately hard | Utility report | 0 |
| Silverthorne | 112 | 6.5 | Moderately hard | Utility report | 0 |
| Dove Valley | 96 | 5.6 | Moderately hard | Utility report | 0 |
| Shaw Heights | 127 | 7.4 | Hard | Utility report | 0 |
| Meridian | 96 | 5.6 | Moderately hard | Utility report | 0 |
Questions
Is Colorado water hard?
The typical Colorado resident gets about 97 mg/L (5.7 gpg), which is moderately hard. About 13% of people in the cities we track have hard or very hard water.
Which city in Colorado has the hardest water?
Among 64 cities with pages here, Evans is highest at 415 mg/L.
Which city in Colorado has the softest water?
Longmont, at 20 mg/L.
Other states
- Alabama73
- Alaska110
- Arizona180
- Arkansas39
- California121
- Connecticut53
- Delaware87
- District of Columbia117
- 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.