Iron Because 5% of the earth’s crust is iron, it is not surprising that many surface and wells contain it in various amounts. It takes just a trace amount of iron to cause problems: as little as .2 ppm can stain plumbing, fixtures, and laundry. In larger amounts, water can become rust colored and have a metallic taste. Iron can coat the insides of pipes with hard, red scale, which reduces flow rates and plugs filter screens. Iron and Hydrogen Sulfide Bacteria Iron bacteria and hydrogen sulfide bacteria are small living organisms that naturally occur in soil, surface water and groundwater. Iron bacteria combine iron (or manganese), present in water with oxygen. The iron bacteria may form large masses of orangey-brown slime. Hydrogen sulfide bacteria live in oxygen-deficient environments. They break down sulfur compounds present in water, producing hydrogen sulfide gas in the process. Iron bacteria are more common than sulfide bacteria because iron is more abundant in groundwater. Hydrogen Sulfide Hydrogen sulfide is a naturally occurring gas that causes an odor that can be described as a rotten egg smell. At high concentrations, it will oxidize in the water when it is released from a faucet and will cause a black stain. Concentrations as low as .5 ppm can be detected by smell and as little as .5 ppm hydrogen sulfide is detectable by taste in drinking water. Tannins Tannins are formed upon the decomposition of vegetation. These compounds are large molecular weight organics that fall under two large primary categories: Humic acids and Fulvic acids. The structure of the tannin varies, depending on the plant life in a given area. Tannins can cause a yellow to brown cast in water and may also impart a taste and odor. They will generally be found in surface water supplies or shallow wells. Manganese Manganese causes dark brown to black stains on plumbing fixtures. Manganese contributes to soap curd. Fabrics washed in manganese-bearing waters are almost invariably stained black. An unpleasant taste and appearance in coffee, tea, and other beverages can be caused by manganese. Manganese deposits can collect in plumbing. Tap water frequently contains a black sediment and turbidity. It can cause the water to have a black appearance. As little as 0.05 ppm manganese in the water supply causes complaints. Water Contaminants Removed Utilizing Zentec Aqua Hybrid Ozone Filtration System
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