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Water Hardness in Tennessee Cities

Water hardness in Tennessee, characterized by the amount of dissolved minerals such as calcium and magnesium, can significantly differ throughout the state due to its varied geological landscapes. Located in the southeastern region of the U.S., Tennessee’s water hardness levels mirror its array of geological features.

Across Tennessee, water hardness can range from moderately soft to significantly hard, depending on the geology of the area and the source of the water supply. For example, areas situated over the Eastern Highland Rim aquifer may have softer water, attributed to the rapid movement of water through less mineral-rich sediments. On the other hand, regions with harder water typically lie beneath limestone and other mineral-laden formations like those found in the Cumberland Plateau, resulting in higher concentrations of dissolved minerals.

The variation in water hardness throughout Tennessee influences not only the taste and aesthetics of the water but also the efficiency of soaps and detergents, plumbing maintenance, and the longevity of appliances that use water. Given the state’s considerable geological diversity, water hardness is not consistent, highlighting the need for localized water treatment solutions and ongoing monitoring of water quality.

In this data the water hardness levels show substantial variations in different cities across Tennessee, USA. Among the cities for which data is reported, the highest water hardness level is recorded in Franklin with a hardness ppm of 135.0 and a hardness gpg of 7.9. On the other hand, the city with the lowest recorded water hardness level is McMinnville, reporting a hardness ppm of 26.0 and a hardness gpg of 1.5.

CityHardness ppm (mg/L)Hardness gpgInformation SourceNotes
Nashville94.05.5Link
Memphis48.02.8Link
Knoxvillen/an/aLink
Chattanooga76.04.4Link
Clarksvillen/an/aLink
Murfreesboro84.04.9LinkMonitors and posts regular updates for hardness on Facebook
Franklin135.07.9LinkLists two values, took average since they’re blended together
Johnson Cityn/an/aLink
Jackson57.03.3LinkMemphis Sands Aquifer
Hendersonvillen/an/aLink
Bartlett38.82.3Link
Kingsportn/an/aLink
Smyrna90.05.3LinkTreatment plant softens city’s water
Spring Hilln/an/aLink
Colliervillen/an/aLink
Clevelandn/an/aLink
Gallatinn/an/aLink
Brentwood96.05.6Link
Columbian/an/aLink
Germantownn/an/aLinkMemphis Sand Aquifer
Lebanonn/an/aLink
Mount Julietn/an/aLink
La Vergne65.03.8Link
Cookeville74.54.4Link
Maryville30.01.8LinkClassifies itself as “soft” using USGS range (0-60ppm). Took the median of that.
Oak Ridgen/an/aLink
Morristownn/an/aLink
Bristoln/an/aLink
Farragutn/an/aLink
Shelbyvillen/an/aLinkDuck River
East Ridge76.04.4LinkZip lookup
Tullahoman/an/aLinkNo online CCR
Springfieldn/an/aLink
Seviervillen/an/aLinkCCR linked on town website gives a 404 Error
Goodlettsvillen/an/aLinkNo water CCR. Is a suburb of Nashville, may be covered by their water utility
Dicksonn/an/aLink
Dyersburgn/an/aLinkMemphis Sand Aquifer
Greenevillen/an/aLink
Nolensville92.05.4LinkBlend of Smyrna and Nashville water
Arlingtonn/an/aLinkNo online CCR, nothing in EPA CCR search, may be covered by Memphis
Athensn/an/aLink
Elizabethtonn/an/aLink
McMinnville26.01.5Link
Lakelandn/an/aLinkNo online CCR, nothing in EPA CCR search, may be covered by Memphis
White Housen/an/aLink
Portlandn/an/aLink
Soddy-Daisyn/an/aLink
Manchestern/an/aLink
Lewisburgn/an/aLinkDuck River
Crossville30.01.8LinkSells to South Cumberland and Grandview
Hartsville/Trousdale Countyn/an/aLink
Red Bank76.04.4LinkZip lookup
Lawrenceburgn/an/aLink
Collegedale76.04.4LinkZip lookup
Alcoan/an/aLink
Union Cityn/an/aLinkMemphis Sand Aquifer
Martinn/an/aLinkMemphis Sand Aquifer
Millingtonn/an/aLink
Lenoir Cityn/an/aLink
Parisn/an/aLink
Atoka57.03.3LinkMemphis Sand Aquifer
Clintonn/an/aLink
Fairviewn/an/aLinkTown doesn’t have online presence. Nothing in EPA CCR search.
Brownsvillen/an/aLink
Winchestern/an/aLink
Oaklandn/an/aLinkMemphis Sand Aquifer
Signal Mountain75.04.4Link
Covingtonn/an/aLinkMemphis Sand Aquifer
Jefferson Cityn/an/aLink
Pulaskin/an/aLink
Milann/an/aLink
Thompson’s Station100.05.8Link
Lexingtonn/an/aLink
Humboldtn/an/aLinkMemphis Sand Aquifer
Ripleyn/an/aLinkMemphis Sand Aquifer
La Folletten/an/aLink
Savannahn/an/aLink
Daytonn/an/aLink
Church Hilln/an/aLink
Fayettevillen/an/aLink
Greenbriern/an/aLinkPurchases from Springfield
Newportn/an/aLink
Lynchburg, Moore Countyn/an/aLink
Munfordn/an/aLinkMemphis Sand Aquifer
Pigeon Forgen/an/aLink
Sweetwatern/an/aLink
Hendersonn/an/aLink
Millersvillen/an/aLinkPer city website, takes WHUD water (https://www.cityofmillersville.com/department/index.php?structureid=24)
Loudonn/an/aLink
Kingstonn/an/aLink
Erwinn/an/aLink
Jonesboroughn/an/aLink
Harrimann/an/aLink
Lafayetten/an/aLink
Rockwoodn/an/aLink
Mount Carmeln/an/aLink
McKenzien/an/aLink
Dunlapn/an/aLink
Medina57.03.3LinkMemphis Sands Aquifer
Bolivarn/an/aLinkDoesn’t publish their CCR online
Top 100 Tennessee 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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