Water Hardness in South Dakota Cities

Water Hardness in South Dakota Cities

Water hardness is determined by the concentration of dissolved calcium and magnesium in water, and this characteristic can greatly differ across the United States, influenced by the specific geological and environmental conditions of each region.

In South Dakota, the range of water hardness can vary from moderate to very hard, depending largely on the geological makeup of the region and the sources of its water supply. South Dakota’s terrain, which encompasses vast agricultural areas, combined with its dependence on both surface water and groundwater, plays a significant role in determining the state’s water hardness levels. Within South Dakota, the degree of water hardness can vary noticeably from one area to another and may also change over time in a specific locale due to alterations in water treatment methods and shifts in water sources. These fluctuations in hardness can affect various aspects, including the water’s taste. Additionally, it can influence the performance of soaps and detergents, presenting challenges for households and industries alike in terms of maintaining water quality and ensuring the efficiency of equipment.

The water hardness levels in South Dakota show variability across different cities, with measurements indicated in parts per million (ppm) and grains per gallon (gpg). Sioux Falls exhibits a notably high hardness level at 248.21ppm or 14.50gpg. Similarly, cities like Mitchell and Springfield, alongside Parkston and Freeman, report a high hardness at 299.57ppm, equating to 17.50gpg. Watertown’s water hardness is somewhat lower but still significant at 225.00ppm or 13.00gpg. On the other end of the spectrum, Tea and Lennox have more moderate levels of hardness, both at 160ppm or 9gpg. Milbank stands out for its exceptionally high water hardness, recorded at 650.48ppm or 38.00gpg, marking it as an outlier in terms of water hardness in the state. Conversely, several cities, including Rapid City, Aberdeen, Brookings, and many others, did not have available data on their water hardness.

City Hardness ppm (mg/L) Hardness gpg Information Source Notes
Sioux Falls 248.21 14.50 Link
Rapid City n/a n/a Link
Aberdeen n/a n/a Link
Brookings n/a n/a Link
Watertown 225.00 13.00 Link
Mitchell 299.57 17.50 Link Bon Homme Yankton Rural Water System
Yankton n/a n/a Link Seems to be separate from Bon Homme Yankton Water
Huron n/a n/a Link Mid Dakota Rural Water System
Pierre n/a n/a Link
Spearfish n/a n/a Link
Box Elder n/a n/a Link
Vermillion n/a n/a Link
Brandon n/a n/a Link
Harrisburg n/a n/a Link
Sturgis n/a n/a Link
Tea 160 9 Link Lewis and Clark Regional Water System
Madison n/a n/a Link Local wells plus Big Sioux Community Water System
Belle Fourche n/a n/a Link
Dell Rapids n/a n/a Link
Hot Springs n/a n/a Link
Milbank 650.48 38.00 Link
Hartford 190 11 Link Purchases 100% from Minnehaha Community Water Corp
Mobridge n/a n/a Link
Canton n/a n/a Link
Summerset n/a n/a Link Black Hawk Water User District
North Sioux City n/a n/a Link
Lead n/a n/a Link Don’t appear to have an online CCR
Winner n/a n/a Link
Chamberlain n/a n/a Link Only has partial CCR online (at bottom of linked page)
Sisseton n/a n/a Link BDM Rural Water
Lennox 160 9 Link Lewis and Clark Regional Water System
Flandreau n/a n/a Link Big Sioux Community Water
Redfield n/a n/a Link WEB Water Development Association
Fort Pierre n/a n/a Link
Volga n/a n/a Link
Beresford n/a n/a Link WEB Water Development Association
Elk Point n/a n/a Link No CCR on city website it appears
Springfield 299.57 17.50 Link Part of Bon Homme County, same as Parkstonm which purchases from Bon Homme-Yankton
Custer n/a n/a Link
Webster n/a n/a Link WEB Water Development Association
Parkston 299.57 17.50 Link Purchases from Bon Homme-Yankton Rural Water System
Wagner n/a n/a Link Randall Community Water District
Groton n/a n/a Link WEB Water Development Association
Crooks 190 11 Link Purchases 100% from Minnehaha Community Water Corp
Salem n/a n/a Link
Freeman 299.57 17.50 Link Purchases from Bon Homme-Yanktown Rural Water System
Miller n/a n/a Link Mid Dakota Rural Water System
Platte n/a n/a Link Randall Community Water District
Baltic 190 11 Link Purchases 100% from Minnehaha Community Water Corp
Eagle Butte n/a n/a Link Mni Waste’ Rural Water
Britton n/a n/a Link Brown-Day-Marshall RWS
Parker n/a n/a Link TM Rural Water, mentions they soften the water at the treatment plant but doesn’t give ppm/gpg
Garretson 190 11 Link Minnehaha Community Water Group
Deadwood n/a n/a Link Lead-Deadwood Sanitary District
Clear Lake n/a n/a Link Brookings Deuel Rural Water System
Gregory n/a n/a Link
Lemmon n/a n/a Link Perkins County, purchases all water from North Dakota but doesn’t specify system
Mission n/a n/a Link Part of Mission Hill-Yankton per EPA lookup. Not sure if it’s the same as Bon Homme-Yankton
Clark n/a n/a Link Purchases from Clark Rural Water
Gettysburg n/a n/a Link Mid Dakota Rural Water
Aurora n/a n/a Link Part of Aurora-Bruel Water System
De Smet n/a n/a Link
Tyndall 299.57 17.50 Link Bon Homme-Yankton Water District
Piedmont n/a n/a Link Black Hawk Water User District
Martin n/a n/a Link
Ipswich n/a n/a Link WEB Water Development Association
Worthing n/a n/a Link South Lincoln Rural Water System
Centerville 160 9 Link Lewis and Clark Regional Water System
Hill City n/a n/a Link
Arlington n/a n/a Link Kingbrook Rural Water System
Whitewood n/a n/a Link
Valley Springs n/a n/a Link
Howard n/a n/a Link Kingbrook Rural Water System
Marion n/a n/a Link TM Rural Water, mentions they soften the water at the treatment plant but doesn’t give ppm/gpg
Faulkton n/a n/a Link WEB Water Development Association
Eureka n/a n/a Link WEB Water Development Association
Viborg n/a n/a Link TM Rural Water, mentions they soften the water at the treatment plant but doesn’t give ppm/gpg
Alcester n/a n/a Link South Lincoln Rural Water System
Estelline n/a n/a Link
Wessington Springs n/a n/a Link
Plankinton n/a n/a Link Aurora-Brule Rural Water System
Scotland 299.57 17.50 Link Bon Homme-Yankton Water District
Edgemont n/a n/a Link
Elkton n/a n/a Link Brookings Deuel Water System
Woonsocket n/a n/a Link
Philip n/a n/a Link West River Lyman Jones Rural Water
Colton 190 11 Link Minnehaha Community Water
Wall n/a n/a Link
Armour n/a n/a Link Randall Community Water District
Lake Andes n/a n/a Link Randall Community Water District, per EPA lookup
Castlewood n/a n/a Link
Onida n/a n/a Link Mid Dakota Rural Water
Selby n/a n/a Link Part of WEB Water, per linked article
Highmore n/a n/a Link Mid Dakota Rural Water
Canistota n/a n/a Link TM Rural Water, mentions they soften the water at the treatment plant but doesn’t give ppm/gpg
Colman n/a n/a Link Big Sioux Water System
Menno 299.57 17.50 Link Bon Homme Yankton RWS
Lake Norden n/a n/a Link
Alexandria 299.57 17.50 Link Hanson Rural Water System
New Underwood n/a n/a Link
Top 100 South Dakota cities by population and their reported water hardness
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.

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