Compensated Hardness
A measure of water condition used for determining water softener capacity. It takes into account the amount of iron present in water as well as hardness. To determine compensated hardness, add twice the iron content to the actual hardness.
 

gpg
Grains per Gallon. A measurement of the amount of dissolved material in water. One grain per gallon (gpg) equals 17.1 parts per million (ppm).

Ion
Electrically charged particles that form when any mineral is dissolved in water. For example, when common table salt (NaCl) is dissolved in water, it forms positively charged ions (Na+) and negatively charged ions (Cl-). The positively charged ions are called cations and the negatively charged ions are anions.

pH
Term used to express the acidic or basic strength of water. The pH scale ranges from 0 to 14. A pH of 7 is neutral, indicating a balance between acidic and basic elements. Values below 7 indicate increasing acid strength as the pH approaches 0. Values above 7 indicate increasing basic strength as the pH approaches 14. Note: Waters with a pH below 5.5 require special attention. Send a water sample to our laboratory for analysis and recommendations for treatment.

ppm
Parts per Million. A common term used in water analysis. One part per million (ppm) equals one pound per million pounds of water. Parts per million may be converted to grains per gallon by dividing by 17.1. One part per million is equal to one milligram per liter.

Ultraviolet
"Ultraviolet" is a form of light that can be harnessed and used for water disinfection, killing even the most dangerous bacteria and viruses commonly found in drinking water. The ultraviolet range is ideal for killing micro-organisms such as e-coli, coliform, cholera, legionaires disease, hepatitis, etc. And PURA's 5.0 micron EPCB (Extended Pass Carbon Block) filter also removes crytosporidium and giardia cysts, and cleans the water by eliminating sediments, chlorine and chlorine byproducts. We recommend PURA's patented water treatment systems which provide water disinfection, through the combination of ultraviolet technology and carbon filtration.