Logan Water Hardness & Quality Report (2026)
Water Hardness
11.9 grains per gallon
Source
mixed
pH Level
8.2
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
489.7 mg/L
Est. Daily Cost
$0.54
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Logan, your appliances are currently losing 27% efficiency due to mineral buildup.
| Appliance | In Logan | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.9 yrs | 8.5 yrs | -66% |
| Washing Machine | 6.1 yrs | 12 yrs | -49% |
| Water Heater | 7.5 yrs | 15 yrs | -50% |
Regional Water Comparison
How Logan compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Logan, Utah | 203.5 mg/L | 2.9 ppt | 🔴 Very Hard | mixed |
| Brigham City, Utah | 173 mg/L | 2.4 ppt | 🟠 Hard | mixed |
| North Ogden, Utah | 327 mg/L | 4.7 ppt | 🔴 Very Hard | mixed |
| Ogden, Utah | 341.5 mg/L | 4.9 ppt | 🔴 Very Hard | mixed |
| South Ogden, Utah | 342 mg/L | 4.9 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Logan compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Logan | 203.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Logan's Water Unique?
Local geology and source profile
Logan, Utah, the Cache County seat in the Cache Valley — home of Utah State University (one of Utah's two flagship land-grant universities), a major Cache Valley agricultural hub (the 'Dairy Capital of Utah'), and a distinctive Utah college town with strong LDS heritage at the northern end of Cache Valley — draws its municipal water supply from the Logan River and Logan Cave Spring via the Logan City Public Works Water Division. Water hardness in Logan measures 203.5 mg/L — classified as very hard.
Logan's very hard supply reflects the Cache Valley calcareous Paleozoic limestone watershed. The Logan River watershed above Logan Canyon drains: the Bear River Range–Wasatch Range (Mississippian Madison Limestone — the classic calcareous limestone of the Wasatch Front mountains, highly soluble and contributing very high dissolved calcium); the Ordovician Fish Haven Dolomite (calcareous dolomite of the eastern Idaho–Utah border range — the principal calcareous aquifer parent rock in the Cache Valley); and the Cache Valley Quaternary calcareous alluvium (Pleistocene Lake Bonneville lacustrine calcareous deposits). The Madison Limestone karst dissolution and the Cache Valley's extraordinary deep calcareous lake floor sediments produce the very hard 203.5 mg/L at Logan.
At 203.5 mg/L, Logan residents face significant hard water challenges. Scale deposits form rapidly on all fixtures and tile — monthly descaling with citric acid solution is essential maintenance. Logan City Public Works Water Division consistently delivers water meeting all Utah DWQ and EPA Safe Drinking Water Act requirements.
Geology & Source: Spring and river supply from the Logan River (Bear River drainage) and the Logan Cave Spring via the Logan City Public Works Water Division — the Cache County Cache Valley Bear River Range (Paleozoic Mississippian–Ordovician calcareous limestone and the Logan Canyon Wasatch Range); very hard supply at 203.5 mg/L — reflecting the Cache Valley calcareous Paleozoic limestone watershed.