Water hardness in Maryland, defined by the concentration of dissolved minerals such as calcium and magnesium, varies across the state due to its diverse geological features. Located in the Mid-Atlantic region, Maryland’s water hardness levels are influenced by the state’s unique geological formations.
In Maryland, water hardness can range from moderately soft to very hard. For example, areas with limestone or sedimentary rock formations, particularly in parts of the western region and the Piedmont Plateau, may experience harder water due to higher mineral content. In contrast, the eastern coastal areas, including the Eastern Shore, where the geology includes more sediment deposits and fewer mineral-rich formations, often have softer water.
This variation in water hardness across Maryland impacts not only the taste and appearance of the water but also the effectiveness of soaps and detergents, the maintenance of plumbing systems, and the longevity of water-using appliances. Given the state’s geological diversity, water hardness is not consistent statewide, highlighting the importance of localized water treatment solutions and continuous monitoring of water quality.
In the provided data, the water hardness levels show substantial variations across different cities in Maryland. Among the cities for which data is reported, the highest water hardness levels are recorded in Rising Sun and Elkton, with hardness levels of 125 ppm (7.3 gpg) and 113 ppm (6.6 gpg), respectively.
City | Hardness ppm (mg/L) | Hardness gpg | Information Source | Notes |
Baltimore | n/a | n/a | Link | Mentions they treat to reduce hardness but don’t quantify |
Frederick | n/a | n/a | Link | |
Gaithersburg | n/a | n/a | Link | Covered by WSSC |
Rockville | n/a | n/a | Link | |
Bowie | n/a | n/a | Link | |
Hagerstown | n/a | n/a | Link | |
Annapolis | n/a | n/a | Link | |
College Park | n/a | n/a | Link | Covered by WSSC |
Salisbury | n/a | n/a | Link | |
Laurel | n/a | n/a | Link | |
Greenbelt | n/a | n/a | Link | Covered by WSSC |
Hyattsville | n/a | n/a | Link | Covered by WSSC |
Westminster | n/a | n/a | Link | |
Cumberland | n/a | n/a | Link | |
Aberdeen | n/a | n/a | Link | |
Takoma Park | n/a | n/a | Link | Covered by WSSC |
Easton | 50.0 | 2.9 | Link | |
Elkton | 113.0 | 6.6 | Link | |
Havre de Grace | 37.0 | 2.2 | Link | |
New Carrollton | n/a | n/a | Link | Covered by WSSC |
Cambridge | n/a | n/a | Link | |
La Plata | n/a | n/a | Link | |
Bel Air | 73.0 | 4.3 | Link | |
Mount Airy | n/a | n/a | Link | |
Bladensburg | n/a | n/a | Link | Covered by WSSC |
Brunswick | n/a | n/a | Link | |
Mount Rainier | n/a | n/a | Link | Covered by WSSC |
Taneytown | n/a | n/a | Link | Mentions hardness, doesn’t quantify |
Riverdale Park | n/a | n/a | Link | Covered by WSSC |
Frostburg | n/a | n/a | Link | |
Ocean City | n/a | n/a | Link | |
Thurmont | n/a | n/a | Link | |
Walkersville | n/a | n/a | Link | |
Chesapeake Beach | n/a | n/a | Link | |
Hampstead | n/a | n/a | Link | |
Glenarden | n/a | n/a | Link | Covered by WSSC |
Cheverly | n/a | n/a | Link | Covered by WSSC |
Fruitland | n/a | n/a | Link | |
District Heights | n/a | n/a | Link | Covered by WSSC |
Poolesville | n/a | n/a | Link | |
Chestertown | n/a | n/a | Link | |
Manchester | n/a | n/a | Link | |
Berlin | n/a | n/a | Link | |
Middletown | n/a | n/a | Link | |
Denton | n/a | n/a | Link | |
Leonardtown | n/a | n/a | Link | |
Centreville | n/a | n/a | Link | |
Delmar | n/a | n/a | Link | |
Perryville | n/a | n/a | Link | |
Seat Pleasant | n/a | n/a | Link | Covered by WSSC |
Sykesville | n/a | n/a | Link | |
Pocomoke City | n/a | n/a | Link | |
Indian Head | n/a | n/a | Link | |
North East | n/a | n/a | Link | |
Capitol Heights | n/a | n/a | Link | Covered by WSSC |
Boonsboro | n/a | n/a | Link | |
Brentwood | n/a | n/a | Link | Covered by WSSC |
Princess Anne | n/a | n/a | Link | |
Berwyn Heights | n/a | n/a | Link | Covered by WSSC |
Smithsburg | n/a | n/a | Link | |
Emmitsburg | n/a | n/a | Link | |
Chevy Chase | n/a | n/a | Link | Covered by WSSC |
Federalsburg | n/a | n/a | Link | |
Rising Sun | 125.0 | 7.3 | Link | |
Forest Heights | n/a | n/a | Link | Covered by WSSC |
Crisfield | n/a | n/a | Link | |
University Park | n/a | n/a | Link | |
Snow Hill | n/a | n/a | Link | |
North Beach | n/a | n/a | Link | |
Mountain Lake Park | n/a | n/a | Link | |
Kensington | n/a | n/a | Link | Covered by WSSC |
Williamsport | n/a | n/a | Link | |
Hurlock | n/a | n/a | Link | |
Chevy Chase Village | n/a | n/a | Link | Covered by WSSC |
Myersville | n/a | n/a | Link | |
Greensboro | n/a | n/a | Link | |
Oakland | n/a | n/a | Link | |
Westernport | n/a | n/a | Link | |
Landover Hills | n/a | n/a | Link | Covered by WSSC |
New Market | n/a | n/a | Link | Frederick County |
Pittsville | n/a | n/a | Link | |
Ridgely | n/a | n/a | Link | |
Edmonston | n/a | n/a | Link | Covered by WSSC |
Hancock | n/a | n/a | Link | |
Colmar Manor | n/a | n/a | Link | Covered by WSSC |
Charlestown | n/a | n/a | Link | |
Fairmount Heights | n/a | n/a | Link | |
New Windsor | n/a | n/a | Link | |
Trappe | n/a | n/a | Link | |
Cottage City | n/a | n/a | Link | Covered by WSSC |
Keedysville | n/a | n/a | Link | |
Morningside | n/a | n/a | Link | Covered by WSSC |
Rock Hall | n/a | n/a | Link | |
Somerset | n/a | n/a | Link | Covered by WSSC |
Woodsboro | n/a | n/a | Link | |
Hebron | n/a | n/a | Link | |
St. Michaels | n/a | n/a | Link | |
Chevy Chase View | n/a | n/a | Link | Covered by WSSC |
Lonaconing | n/a | n/a | Link | |
Garrett Park | n/a | n/a | Link | Covered by WSSC |
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.