Although the minerals in drinking water are beneficial to good health, the aesthetic effects cause by hardness are the most common reasons to soften water. The typical equipment used for this purpose is the ion exchange softener. Softening is accomplished with synthetic resin media by exchanging ions of calcium and magnesium that attribute to hardness with ions of sodium. Although this method of softening produces water with zero hardness, it is important to understand the limitations of the process.
- Ion exchange softeners increase the sodium content of the treated water and may be potentially harmful to persons that are on sodium restricted diets or are just health conscious. People should limit or restrict the amount of softened water they consume for food preparation.
- The softening process removes the chlorine residual from the water and may accelerate bacteria growth within the plumbing system.
- The disposal of spent brine solution and rinse water from softener regeneration is becoming a major problem and can impact wastewater treatment facilities and septic systems. Softener byproducts are corrosive to material they contact and possess varying toxic levels in relationship with the environment.
Water is referred to as the "universal solvent" because, over the course of time, water will dissove or erode almost any material that it is in contact with. It is this natural occurance that attributes to the hardness of water.
Water hardness is normally referred to as a measure of the soap or detergent consuming power of water. Technically, hard water is water having a high concentration of calcium and magnesium ions. These, along with other minerals, are commonly present in all natural water.
When water that contains any degree of hardness evaporates or is heated in typical household water heating equipment, it can leave residual mineral deposits. In the water industry hardness is expressed in terms of milligrams per liter (mg/l). In the water treatment business, however, hardness is most often expressed in terms of grains per gallon (gr/gal). The conversion factors is 17.1 mg/l equal 1gr/gal of hardness.
The table below describes the various textbook levels of hardness and their classifications:
|Description||Hardness (mg/l)||Hardness (gr/gal)|
|Excessively Hard||over 250||over 15|
As water seeps through the ground (or percolates) to reach the aquifers, it is filtered and purified through the many layers of earth at the same time, water may dissolve and retain the naturally occuring minerals it comes in contact with. This is why ground water (or well water) does not usually need to be treated or filtered. Higher levels of dissolved solids, constant cool temperatures, and low levels of dissolved oxygen characterize ground water. However, ground water may contain an abundance of the minerals that contribute to hardness.
Water that comes from streams, rivers and lakes is exactly the opposite. Surface water accumulates mainly as a result of direct rain or snow. It does not percolate through the ground and does not pick up the elevated levels of dissolved minerals that attribute to water hardness. For the most part, surface water is referred to as "naturally soft", although is is not mineral free. In general, turbidity, suspended solids, rapid temperature fluctuations, and high levels of dissolved oxygen characterize surface water.
Water hardness is a measure of the mineral content of water. "Hard" water takes more soap to create lather than "soft" water
The state and federal government madate disinfecting. Chlorine is a disinfectant used to remove any harmful bacteria from the drinking water and to ensure safe water throughout the distribution system.
No. While traces of flourides may be indigenous to ground water, WMA does not deem it feasible, or cost effective, to flouridate as only 10% of our output is used for human consumption. If you have concerns, you should contact your dentist or healthcare provider.
Heat the water until bubbles come from the bottom of the pot to the top. Once the water reaches a rolling boil, let it boil for 1 minute. Turn off the heat source and let the water cool. Pour the water into a clean container with a cover for storage.