Water hardness in Iowa, characterized by the amount of dissolved minerals such as calcium and magnesium, can significantly differ among various cities across the state due to its varied geological landscapes. Situated in the Midwest of the U.S., Iowa’s water hardness levels reflect the geological diversity within the state.
Across Iowa, water hardness can range from moderately soft to very hard, depending on the geological makeup of the area and the source of the water supply. For example, regions with limestone bedrock, such as those in eastern Iowa, often have harder water due to the high mineral content. In contrast, areas with more sandstone or shale bedrock may experience softer water.
The variation in water hardness throughout Iowa influences not only the taste and aesthetics of the water but also the efficiency of soaps and detergents, plumbing maintenance, and the lifespan of appliances that utilize water. Given the state’s geological diversity, water hardness is not uniform, highlighting the need for localized water treatment solutions and ongoing monitoring of water quality.
In the provided data, the water hardness levels show substantial variations across different cities in Iowa. Among the cities for which data is reported, the highest water hardness level is recorded in Hiawatha with a hardness of 291.0 ppm, 17.0 gpg. Conversely, the city with the lowest recorded water hardness level is Iowa City, reporting a hardness of 107.5 ppm, 6.3 gpg.
City | Hardness ppm (mg/L) | Hardness gpg | Information Source | Notes |
Des Moines | n/a | n/a | Link | Mentions they soften the water but don’t quantify |
Cedar Rapids | n/a | n/a | Link | Mentions they soften the water but don’t quantify |
Davenport | n/a | n/a | Link | |
Sioux City | n/a | n/a | Link | |
Iowa City | 107.5 | 6.3 | Link | |
Ankeny | n/a | n/a | Link | Gets from Des Moines |
West Des Moines | n/a | n/a | Link | |
Waterloo | n/a | n/a | Link | |
Ames | n/a | n/a | Link | Mentions they soften the water but don’t quantify |
Council Bluffs | n/a | n/a | Link | |
Dubuque | n/a | n/a | Link | Mentions they soften the water but don’t quantify |
Urbandale | n/a | n/a | Link | Gets from Des Moines |
Marion | n/a | n/a | Link | |
Cedar Falls | n/a | n/a | Link | |
Bettendorf | n/a | n/a | Link | |
Marshalltown | n/a | n/a | Link | Mentions they soften the water but don’t quantify |
Mason City | n/a | n/a | Link | |
Waukee | 136.9 | 8.0 | Link | |
Ottumwa | n/a | n/a | Link | |
Fort Dodge | n/a | n/a | Link | |
Clinton | n/a | n/a | Link | |
Johnston | n/a | n/a | Link | Gets from Des Moines |
Burlington | n/a | n/a | Link | |
Muscatine | n/a | n/a | Link | |
Coralville | n/a | n/a | Link | |
North Liberty | n/a | n/a | Link | |
Altoona | n/a | n/a | Link | |
Clive | n/a | n/a | Link | Gets from Des Moines |
Grimes | n/a | n/a | Link | Mentions they soften, but don’t quantify |
Indianola | n/a | n/a | Link | Gets from Des Moines |
Newton | n/a | n/a | Link | |
Norwalk | n/a | n/a | Link | Gets from Des Moines |
Boone | n/a | n/a | Link | |
Oskaloosa | n/a | n/a | Link | |
Spencer | n/a | n/a | Link | Mentions they soften, but don’t quantify |
Storm Lake | n/a | n/a | Link | |
Pleasant Hill | n/a | n/a | Link | Gets from Des Moines |
Le Mars | n/a | n/a | Link | |
Pella | n/a | n/a | Link | |
Waverly | n/a | n/a | Link | |
Carroll | n/a | n/a | Link | |
Fort Madison | n/a | n/a | Link | |
Keokuk | n/a | n/a | Link | |
Fairfield | n/a | n/a | Link | |
Grinnell | n/a | n/a | Link | |
Mount Pleasant | n/a | n/a | Link | Mentions they soften, but don’t quantify |
Sioux Center | n/a | n/a | Link | |
Denison | n/a | n/a | Link | |
Bondurant | n/a | n/a | Link | Gets from Des Moines |
Perry | n/a | n/a | Link | |
Webster City | n/a | n/a | Link | |
Decorah | n/a | n/a | Link | |
Clear Lake | n/a | n/a | Link | |
Creston | n/a | n/a | Link | |
Knoxville | n/a | n/a | Link | |
Charles City | n/a | n/a | Link | |
Washington | n/a | n/a | Link | |
Hiawatha | 291.0 | 17.0 | Link | |
Nevada | n/a | n/a | Link | |
Atlantic | n/a | n/a | Link | |
Eldridge | n/a | n/a | Link | |
Adel | n/a | n/a | Link | |
Orange City | n/a | n/a | Link | |
Independence | n/a | n/a | Link | |
Maquoketa | n/a | n/a | Link | |
Asbury | n/a | n/a | Link | |
Estherville | n/a | n/a | Link | Mentions they soften, but don’t quantify |
Oelwein | n/a | n/a | Link | |
Polk City | n/a | n/a | Link | |
Red Oak | n/a | n/a | Link | |
Osceola | n/a | n/a | Link | |
DeWitt | n/a | n/a | Link | Only found an old report |
Clarinda | n/a | n/a | Link | |
Sheldon | n/a | n/a | Link | |
Spirit Lake | n/a | n/a | Link | |
Winterset | n/a | n/a | Link | |
Anamosa | n/a | n/a | Link | |
Algona | n/a | n/a | Link | |
Centerville | n/a | n/a | Link | |
Tiffin | n/a | n/a | Link | |
Glenwood | n/a | n/a | Link | |
Windsor Heights | n/a | n/a | Link | Gets from Des Moines |
Cherokee | n/a | n/a | Link | |
Manchester | n/a | n/a | Link | |
Iowa Falls | n/a | n/a | Link | |
Sergeant Bluff | n/a | n/a | Link | |
Vinton | n/a | n/a | Link | |
Harlan | n/a | n/a | Link | |
Shenandoah | n/a | n/a | Link | |
Humboldt | n/a | n/a | Link | |
Le Claire | n/a | n/a | Link | |
Camanche | n/a | n/a | Link | |
Evansdale | n/a | n/a | Link | |
Huxley | n/a | n/a | Link | |
Dyersville | 250.0 | 14.6 | Link | |
Mount Vernon | n/a | n/a | Link | |
Hampton | n/a | n/a | Link | No working online CCR that was found |
Forest City | n/a | n/a | Link | |
Chariton | n/a | n/a | Link | |
Carlisle | n/a | n/a | Link |
ppm = Parts Per Million
mg/L = Milligrams Per Liter
gpg = Grains Per Gallon
Hard water can cause issues such as mineral buildup in plumbing and appliances, reduce the efficacy of soaps and detergents, and affect the taste of the water. A tried and true solution is the use of a water softener. A water softener, like the ones from DROP, could be a worthwhile investment.
These devices work by replacing the calcium and magnesium ions that cause hardness with sodium ions, resulting in softer water. With innovative features, easy installation, and efficient operation, DROP smart water softeners provide a solution to hard water issues, extending the lifespan of appliances, improving water taste, enhancing soap effectiveness, reducing scale build-up, and increasing the overall water efficiency in your home.