Fort Dodge Water Hardness & Quality Report (2026)

The Fort Dodge Water Utility, operated by the City of Fort Dodge in Webster County, Iowa, serves approximately 25,000 residents across north-central Iowa. The supply is sourced entirely from groundwater wells tapping local aquifers, with primary production from the Miller Wells and other municipal well fields. Water is treated at the city's Water Treatment Plant, which employs aeration, filtration, and chlorination processes before distribution. No surface water sources such as rivers or reservoirs are utilized — the supply is entirely groundwater-based, drawn from aquifers within the local watershed.

The groundwater sources lie within the Boone River sub-basin of the larger Des Moines River watershed, characterized by rolling glacial plains and moraines. Underlying rock formations include Devonian limestone and dolomite aquifers — including those in the Wapsipinicon and Cedar Valley Groups — interspersed with shale layers, producing a hard supply through high concentrations of dissolved calcium and magnesium from prolonged contact with carbonate bedrock. Quaternary glacial till from the Wisconsinan glaciation further influences recharge, filtering water through mineral-rich deposits and enhancing the mineralized groundwater profile.

Scale buildup at this hard level is severe, rapidly coating water heaters, dishwashers, boilers, and pipes — reducing efficiency and lifespan, with water heaters potentially failing in as little as 5–7 years without mitigation. Laundry feels stiff, soap scum forms easily, and spotting occurs on glassware and fixtures. Recommended maintenance includes regular vinegar descaling, whole-house sediment filters, and annual inspections of water-using equipment. A water softener is strongly recommended. Treatment includes aeration for iron and manganese removal, greensand filtration, partial plant softening, and chlorine disinfection; pH is maintained at approximately 7.5–8.0.