Hardest Water in Utah
19 cities ranked by water hardness. Tooele tops the list at 280 PPM.
Utah's water hardness varies significantly by city and water source. The state average across our database is 241 PPM, which is very hard. Most Utah households will benefit from a water softener. 100% of cities we track in Utah have hardness above 120 PPM.
Tooele has the hardest water at 280 PPM (16.4 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 | Tooele | 280 | 16.4 | Extremely Hard | Yes |
| 2 | Provo South | 270 | 15.8 | Extremely Hard | Yes |
| 3 | St. George | 266 | 15.6 | Extremely Hard | Yes |
| 4 | Layton | 265 | 15.5 | Extremely Hard | Yes |
| 5 | Clearfield | 260 | 15.2 | Extremely Hard | Yes |
| 6 | West Valley City | 251 | 14.7 | Extremely Hard | Yes |
| 7 | Salt Lake City | 250 | 14.6 | Extremely Hard | Yes |
| 8 | Cottonwood Heights | 250 | 14.6 | Extremely Hard | Yes |
| 9 | Bountiful | 245 | 14.3 | Very Hard | Yes |
| 10 | Ogden | 240 | 14 | Very Hard | Yes |
| 11 | Herriman | 240 | 14 | Very Hard | Yes |
| 12 | Provo | 235 | 13.7 | Very Hard | Yes |
| 13 | Riverton | 235 | 13.7 | Very Hard | Yes |
| 14 | Lehi | 230 | 13.5 | Very Hard | Yes |
| 15 | Draper | 225 | 13.2 | Very Hard | Yes |
| 16 | Sandy | 222 | 13 | Very Hard | Yes |
| 17 | Logan | 210 | 12.3 | Very Hard | Yes |
| 18 | Orem | 209 | 12.2 | Very Hard | Yes |
| 19 | West Jordan | 187 | 10.9 | Very Hard | Yes |
Frequently Asked Questions
What is the average water hardness in Utah?
Across 19 cities in our database, the average water hardness in Utah is 241 PPM (14.1 GPG). This ranges from 187 PPM in West Jordan to 280 PPM in Tooele.
Do I need a water softener in Utah?
It depends on your city. 100% of Utah cities in our database (19 of 19) have hardness above 120 PPM where a softener provides measurable benefit. Check your specific city above.
Which Utah city has the softest water?
West Jordan has the softest water in Utah at 187 PPM (10.9 GPG). No water softener is needed at this level.
What causes hard water in Utah?
Hard water in Utah 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.