Fort Dodge Water Hardness & Quality Report (2026)
Water Hardness
18.3 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
760.4 mg/L
Est. Daily Cost
$0.84
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 Fort Dodge, your appliances are currently losing 42% efficiency due to mineral buildup.
| Appliance | In Fort Dodge | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3 yrs | 12 yrs | -75% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Fort Dodge compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Fort Dodge, Iowa | 314 mg/L | 6.5 ppt | 🔴 Very Hard | river |
| Boone, Iowa | 249.5 mg/L | 5.2 ppt | 🔴 Very Hard | river |
| Ames, Iowa | 283.5 mg/L | 5.9 ppt | 🔴 Very Hard | river |
| Waukee, Iowa | 339.5 mg/L | 7 ppt | 🔴 Very Hard | river |
| Johnston, Iowa | 324.5 mg/L | 6.7 ppt | 🔴 Very Hard | river |
National Benchmark
How Fort Dodge compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Fort Dodge | 314 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Fort Dodge's Water Unique?
Local geology and source profile
Fort Dodge, Iowa, in Webster County on the Des Moines River in north-central Iowa, receives its municipal water from the City of Fort Dodge Water Works, drawing directly from the Des Moines River. The Des Moines River flows through the heart of Webster County's glaciated plains before continuing south through Boone and Polk counties to the capital. Fort Dodge has a remarkable geological distinction: it sits atop the Fort Dodge Formation — Iowa's most famous gypsum and alabaster deposit, mined commercially for over a century and historically exported to major markets nationwide.
The very hard 314 mg/L hardness and elevated TDS of 760.4 mg/L are directly influenced by Webster County's exceptional mineral geology. The Des Moines River watershed above Fort Dodge drains extensive Devonian and Mississippian carbonate formations of the Iowa drift plains — contributing carbonate hardness to all river water in this reach. Fort Dodge's unique addition is the Fort Dodge Formation gypsum — calcium sulfate (CaSO₄·2H₂O) deposits exposed along the Des Moines River valley that dissolve into the river during normal flow, significantly elevating sulfate content and TDS beyond what carbonate contact alone would produce. This gypsum-carbonate combination creates one of Iowa's most mineral-rich municipal water supplies.
At 314 mg/L, Fort Dodge residents deal with very hard water affecting all household systems. Scale forms rapidly in kettles and coffee machines, dishwashers require softener salts to produce presentable glassware, and the elevated TDS contributes a distinct mineral taste to tap water. Water heaters in Fort Dodge homes accumulate calcium and sulfate scale aggressively. Descaling appliances every four to six weeks is the practical cadence. A whole-house water softener is strongly recommended for Fort Dodge households, and an under-sink reverse osmosis unit significantly improves drinking water quality by reducing both the gypsum-derived sulfate and carbonate-derived hardness flavors.
Geology & Source: Fort Dodge in Webster County draws from the Des Moines River — the Des Moines flows through Webster County's famous gypsum (alabaster) deposits and Devonian and Mississippian carbonate formations — calcium sulfate dissolution from the Fort Dodge Gypsum Formation combined with carbonate basin drainage produces very hard water at 314 mg/L with high TDS of 760 mg/L, uniquely influenced by the most extensive gypsum mining region in Iowa.