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Water Treatment Issues:

Acid Water

Algae, cyanotoxins

Alkalinity

Alum (Aluminum Sulfate)

Aluminum

Ammonia

Arsenic

Asbestos

Bacteria

Barium

Benzene

Bicarbonate Alkalinity

Boron (Borate, Boric Acid)

Brackish Water

Bromine

Bromate

Cadmium

Calcium

Carbon Dioxide

Carbon Tetrachloride

Chloramines

Chloride

Chlorine

Chromium

Color

Copper

Corrosion

Cryptosporidium

Cyanide

Dichloroethylene

Endocrine Disruptors

Fluoride

Giardia Lambia

Hardness

Heterotrophic Bacteria (HPC)

Hydrogen Sulfide

Iodine

Iron

Iron Bacteria

Lead

Magnesium

Manganese

Mercury

Methane

MTBE

Napthalene

Nickel

Nitrates and Nitrites

NMDA (N-Nitrosodimethylanime)

Norovirus

Odor

Organics

Perchloroethylene (PCE)

Perchlorate

Pesticides

pH

Pharmaceuticals

Radon

Radium

Selenium

Silica

Silver

Strontium

Sulfate

TDS (Total Dissolved Solids)

Trichlorethylene (TCE)

Tritium

Uranium

Vanadium

Vinyl Chloride

VOC


Cadmium

Cadmium, a soft, bluish-white metal impurity usually associated with zinc, enters the environment and becomes a water contaminant through a variety of industrial and agricultural operations and as a by product of fossil fuel use. General use has declined, and now about 80% of cadmium in the environment comes from nickel-cadmium batteries. Cadmium often enters water as the result of deterioration of galvanized plumbing, fertilizer contamination, and industrial waste in general.

Cadmium has an EPA Primary Standard contaminant level listing of 0.005 mg/l.

Cadmium can have many serious health effects. For a full discussion, visit the EPA's website.

Cadmium is easily removed from water by reverse osmosis (95 to 98%), by cation exchange (water softener), and by dialysis.


Sources: Enting Engineering Handbook. Wikipedia, EPA. A good source of Cadmium information, including the many adverse health issues associated with cadmium, is the EPA's website.