Pocatello Water Hardness & Quality Report (2026)
Water Hardness
2.1 grains per gallon
Source
reservoir
pH Level
7.2
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
59.1 mg/L
Est. Daily Cost
$0.10
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 Pocatello, your appliances are currently losing 5% efficiency due to mineral buildup.
| Appliance | In Pocatello | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.4 yrs | 8.5 yrs | -1% |
| Washing Machine | 12.2 yrs | 12 yrs | — |
| Water Heater | 14.1 yrs | 15 yrs | -6% |
Regional Water Comparison
How Pocatello compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Pocatello, Idaho | 36.5 mg/L | 1.1 ppt | 🟢 Soft | reservoir |
| Chubbuck, Idaho | 49 mg/L | 1.3 ppt | 🟢 Soft | reservoir |
| Idaho Falls, Idaho | 44.5 mg/L | 1.3 ppt | 🟢 Soft | reservoir |
| Ammon, Idaho | 63.5 mg/L | 1.5 ppt | 🟡 Moderately Hard | reservoir |
| Conda, Idaho | 74.5 mg/L | 1.7 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Pocatello compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Pocatello | 36.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Pocatello's Water Unique?
Local geology and source profile
Pocatello, Idaho, the Bannock County seat on the Portneuf River in the eastern Snake River Plain — Idaho's second-largest city, home of Idaho State University, the 'American Falls' power hub, and historically the most important railroad junction in Idaho (Union Pacific Pocatello Junction) — draws its municipal water supply from the Eastern Snake River Plain Aquifer and the Portneuf River Valley alluvial aquifer via the City of Pocatello Utility Services Water Division. Water hardness in Pocatello measures 36.5 mg/L — classified as very soft.
Pocatello's very soft supply reflects the Eastern Snake River Plain's volcanic basalt aquifer geology. The Eastern Snake River Plain Aquifer — one of the largest and most productive aquifers in North America, underlain by Quaternary Snake River basalt (the Yellowstone hotspot basalt flows of the Snake River Plain) — is primarily composed of calcium-poor mafic basalt (the Pliocene–Pleistocene basalt flows of the ESRP — olivine basalt, plagioclase-poor, with minimal calcareous contact). The Portneuf River Valley in Pocatello also drains the Aspen Range and Bannock Range (Cambrian–Ordovician calcareous formations of the Idaho-Wyoming fold-thrust belt), but the dominant volcanic basalt aquifer recharge produces the very soft 36.5 mg/L.
With hardness at 36.5 mg/L, Pocatello residents enjoy very soft water with essentially no scale challenges. City of Pocatello Utility Services Water Division consistently delivers water meeting all Idaho DEQ and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Eastern Snake River Plain Aquifer and Portneuf River Valley alluvial aquifer via the City of Pocatello Utility Services Water Division — the Bannock County Portneuf Valley Quaternary volcanic basalt and Snake River Plain basalt aquifer; very soft supply at 36.5 mg/L — reflecting the Snake River Plain volcanic basalt aquifer's calcium-poor basaltic terrain.