Ammon Water Hardness & Quality Report (2026)
Water Hardness
3.7 grains per gallon
Source
reservoir
pH Level
7.4
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
120.3 mg/L
Est. Daily Cost
$0.17
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 Ammon, your appliances are currently losing 8% efficiency due to mineral buildup.
| Appliance | In Ammon | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.5 yrs | 8.5 yrs | -12% |
| Washing Machine | 11.3 yrs | 12 yrs | -6% |
| Water Heater | 13.1 yrs | 15 yrs | -13% |
Regional Water Comparison
How Ammon compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Ammon, Idaho | 63.5 mg/L | 1.5 ppt | 🟡 Moderately Hard | reservoir |
| Idaho Falls, Idaho | 44.5 mg/L | 1.3 ppt | 🟢 Soft | reservoir |
| Rexburg, Idaho | 90.5 mg/L | 1.9 ppt | 🟡 Moderately Hard | reservoir |
| Chubbuck, Idaho | 49 mg/L | 1.3 ppt | 🟢 Soft | reservoir |
| Pocatello, Idaho | 36.5 mg/L | 1.1 ppt | 🟢 Soft | reservoir |
National Benchmark
How Ammon compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Ammon | 63.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Ammon's Water Unique?
Local geology and source profile
Ammon, Idaho, in Bonneville County — a Bonneville County city adjacent to Idaho Falls and Ucon in the upper Snake River Plain of southeast Idaho — receives its water from the Ammon Water Division, drawing from the Eastern Snake Plain Aquifer (ESPA) (Bonneville County) through the southeast Idaho distribution.
The moderately soft 63.5 mg/L hardness and TDS of 120.3 mg/L reflect the southeast Idaho Eastern Snake Plain Aquifer's moderately soft volcanic basalt character — consistent with other ESPA-served Bonneville County communities (Idaho Falls: ~65 mg/L; Shelley: ~68 mg/L). The Eastern Snake Plain Aquifer at Bonneville County is developed in Quaternary Snake River Plain basalt (slightly calcareous at hydrothermal alteration zones — minor hardness contributor), Miocene Idavada Volcanic Group rhyolite (insoluble), and Quaternary glacial outwash from the Teton Range (slightly calcareous — minor contributor). The predominantly insoluble volcanic basalt produces the moderately soft southeast Idaho supply.
At 63.5 mg/L, Ammon's water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and bathroom fixtures need occasional cleaning. Semi-annual descaling is appropriate. The PFAS level of 1.5 ppt is very low — the Bonneville County southeast Idaho rural corridor has minimal major AFFF military PFAS sources adjacent to the Eastern Snake Plain Aquifer, and the volcanic basalt aquifer shows excellent natural PFAS filtration.
Geology & Source: Ammon in Bonneville County draws from the Ammon Water Division on the Eastern Snake Plain Aquifer (Bonneville County, southeast Idaho) — the ESPA at Bonneville County is developed in Quaternary Snake River Plain basalt (slightly calcareous at alteration zones) and Miocene rhyolitic ash — Idaho Bonneville County Eastern Snake Plain Aquifer volcanic basalt watershed produces moderately soft water at 63.5 mg/L with TDS 120.3 mg/L.