Hardest Water in North Dakota
6 cities ranked by water hardness. Dickinson tops the list at 310 PPM.
North Dakota's water hardness varies significantly by city and water source. The state average across our database is 270 PPM, which is very hard. Most North Dakota households will benefit from a water softener. 100% of cities we track in North Dakota have hardness above 120 PPM.
Dickinson has the hardest water at 310 PPM (18.1 GPG). At this level, expect visible scale on faucets, reduced water heater efficiency, and higher soap usage. A salt-based water softener typically pays for itself within 12-18 months in energy and consumable savings.
| # | City | PPM | GPG | Level | Softener? |
|---|---|---|---|---|---|
| 1 | Dickinson | 310 | 18.1 | Extremely Hard | Yes |
| 2 | Bismarck | 299 | 17.5 | Extremely Hard | Yes |
| 3 | Minot | 280 | 16.4 | Extremely Hard | Yes |
| 4 | Grand Forks | 259 | 15.1 | Extremely Hard | Yes |
| 5 | West Fargo | 240 | 14 | Very Hard | Yes |
| 6 | Fargo | 230 | 13.5 | Very Hard | Yes |
Frequently Asked Questions
What is the average water hardness in North Dakota?
Across 6 cities in our database, the average water hardness in North Dakota is 270 PPM (15.8 GPG). This ranges from 230 PPM in Fargo to 310 PPM in Dickinson.
Do I need a water softener in North Dakota?
It depends on your city. 100% of North Dakota cities in our database (6 of 6) have hardness above 120 PPM where a softener provides measurable benefit. Check your specific city above.
Which North Dakota city has the softest water?
Fargo has the softest water in North Dakota at 230 PPM (13.5 GPG). No water softener is needed at this level.
What causes hard water in North Dakota?
Hard water in North Dakota is caused by dissolved calcium and magnesium from the local geology. Limestone and dolomite bedrock are the primary sources, dissolving minerals into groundwater and surface water as it flows through the rock.