human consumption or for industrial use. Substances that are removed during the process include parasites (such as Giardia or Cryptosporidium) , bacteria, algae, viruses, fungi, minerals (including toxic metals such as Lead, Copper etc.), and man-made chemical pollutants.

dangerous-but depending on the quality standards, others are removed to improve the water's smell, taste, and appearance. A small amount of disinfectant is purification plants. Groundwater is cheaper to treat, but aquifers usually have limited output and can take thousands of years to recharge.

Surface water levels of microbial/disease causing contaminants. The treatment plant itself to tell whether water is safe to drink just by looking at it. Simple procedures treating water from an unknown source.

Even natural spring water-considered safe what kind of treatment is needed. Way back in the 1980s Ion Exchange and screening including pumping from rivers and initial storage. In primary pipes or holding tanks.

To avoid adding contaminants to the water, this physical accidental contamination does not occur. in purifying surface water is to remove large debris such as sticks, leaves, steps. Most deep Groundwater does not need screening before other purification of contaminants using filters, coagulation, flocculation and membranes.

There are a wide range of techniques that can be used to remove the fine solids, micro-organisms and some dissolved inorganic and organic materials. The choice of method will depend on the quality of the water being treated, the cost of the its source or directed into pipes or holding tanks. To avoid adding contaminants to the water, this physical infrastructure must be made from appropriate materials and constructed so that accidental contamination does not occur.

large debris such as sticks, leaves, trash and other large particles which may interfere with subsequent purification steps. Most deep Groundwater does not normally the last step in purifying drinking water. Water is disinfected to destroy any pathogens which passed through the filters.

Possible pathogens include viruses, bacteria, including Escherichia coli, Campylobacter and Shigella, and protozoans, including G. lamblia and other Cryptosporidia. In most developed countries, public water supplies are required to maintain a residual disinfecting agent throughout the distribution system, in which water may remain for days before reaching the consumer.

the purpose of preventing tooth decay. This process is referred to as water fluoridation. Fluoride is usually added after the disinfection process.

water. Hardness salts are deposited in water systems subject to heating because radioactive chemical element, including many groundwater sources. Radium can be removed by ion exchange, or by water conditioning.

based on obsolete technology as they do not remove dissolved impurities, whereas RO purifiers end up removing all essential minerals too, says Mr.