Chlorination – is the most common solution used for disinfection of water. Not all types of bacteria are harmful. Biological contamination has two forms, pathogenic (disease causing) and non-pathonegenic (non-disease causing). All water supplies should be tested for biological content prior to use and consumption.
Turbidity – refers to how clear the water is. The higher the amount of total suspended solids (TSS) in the water, the cloudier it appears and the turbidity levels are higher. It may be clay and silt from shoreline erosion, bottom sediments and organic debris from stream and wastewater discharge.
Arsenic – can cause stomach pain, nausea, vomiting, diarrhea, numbness in hands and feet, partial paralysis, and blindness. It can also cause damage to the skin, circulatory problems, and increase the risk of cancer. MCL = .01 or .05 (depending on local standards for your area).