Water Filters and Filtration Types to Remove Different Contaminants

Known drinking water contaminants are listed ... and many of these are removed by home water filter units. If concern extends to complete water use in the home then whole house water filter systems should be seriously considered.

Contaminants are both naturally occurring and artificially added through day to day animal and human behavior. The list below is a recognized list of what might end up in drinking water ... this does not mean every contaminant is in the water.

Local water authorities can advise on what may be in the water in your area. All home water filter units or purifiers have a specific life ... the material inside the home water filters and purifiers become exhausted and MUST be replaced at specific intervals for the water filters or purifiers to function effectively. Some water filter units work on basis of time in use ... others in how much water has flowed through the home water filters. 2,4,5-TP, 2,4-D, Alachlor, Arsenic, Asbestos, Atrazine, Bacteria, Barium, Cadmium, Carbufuran, Chloramine, Chlordane, Chlorides, Chlorine,

Chlorination By-Products, Chromium, Copper, Cryptosporidium, Cysts, Dibromochloropropane, Ethylene Dibromide, Fluoride, Hardness, Heptachlor Epoxide,

Hydrogen Sulfide, Iron, Lead, Lindane, Mercury, Methoxychlor, MTBE, o-dichlorobenzene, Nitrate, Nitrite, ,Particulate Matter (suspened solids),

PCB, Radium, Radon, Selenium, Sodium, Sulfates, Styrene, Taste and Odor, Total Dissolved Solids (TDS), Toxaphene, Trichloroethylene (TCE), Trihalomethanes (TTHM), Turbidity, Uranium, Volatile Organic Chemicals (VOCs), Xylenes, Zinc Americans on average use about 53 gallons per day per person ... about 1 to 2 gallons per capita per day is drinking water used specifically for drinking and cooking. This is typically water that would flow through home water filters or purifiers as distinct from whole house water filters. Activated carbon drinking water filters or purifiers (also called charcoal water filters). These residential water filters adsorb organic contaminants ... those that that cause taste and smell problems in your tap water. Some designs of water filters can remove chlorination by products, cleaning solvents, and some pesticides.Activated carbon water filter canisters must be replaced periodically. Activated carbon water filters are not good for removing metals such as lead and copper.

Ion Exchange drinking water filters or purifiers ...

these are the ones commonly used on feed water systems to boilers. They remove minerals from your water, particularly calcium and magnesium. They are effective for residential water softening filtration type purposes. Some ion exchange softening units can remove radium and barium from water and those ion exchange water filters that use activated alumina are used to remove fluoride and arsenic from water. These residential units need to be regenerated periodically using common salt which reverses the process. Reverse osmosis drinking water filter purifier units remove a diverse list of contaminants, more than other systems including those associated with smell and taste . Of special importance is that reverse osmosis water filters can remove nitrates, sodium, and other dissolved inorganic compounds, as well as organic compounds especially when mixed with activated carbon in the water filter canister. Excessive levels of nitrates in residential drinking water can cause blue baby syndrome, which can be fatal without immediate medical attention ... reference EPA publications.

Distillation water filters or purifiers

These are units which boil water and then condense the steam produced to create distilled water.

Boiling water if often done where microbial contamination is suspected. Remember however that boiling if it is prolonged can reduces the volume of water thus concentrating those contaminants killed by the temperature of boiling water. This includes nitrates and pesticides. Choosing Your Drinking Water Filters and purifiers In General ...

No single residential water filter unit or design can remove everything. You may decide to use more than a single type of water filter in your home. You must stick to recommended levels of use and replacement for your chosen water filters. Before drinking water gets to a tap (where an in line whole house water filter or a limited use water filter can be fitted) it goes through a series of processes described here .

Coagulation and drinking water filters for purification

Removes dirt and other particles suspended in water. Alum and other chemicals are added to water to form tiny sticky particles called floc which attract the dirt particles. The combined weight of the dirt and the alum (floc) become heavy enough to sink to the bottom during sedimentation.

Sedimentation and drinking water filters or purifiers:

The heavy particles (floc) settle to the bottom and the clear water moves to filtration. This why there should be virtually no suspended solids in tap water going to any home water filter.

Storage and drinking water filters

Water is placed in a closed tank or reservoir for disinfection to take place. The water then flows through pipes to homes

and businesses in the community.

Disinfection and drinking water filters:

A small amount of chlorine is added or some other disinfection method is used to kill any bacteria or microorganisms that may be in the water ... an important reason for most people benefiting from a home water filter system ... removal of chlorine taste and smell.

Water Filtration

The water passes through filter beds, some made of layers of sand, gravel, and charcoal that help remove even smaller particles. This is why there should be virtually no suspended solids in tap water going to any home water filter. Excessive levels of nitrates in residential drinking water can cause blue baby syndrome which can be fatal without immediate medical attention ... reference EPA publications. You need reverse osmosis home water filters to remove nitrates. List of water filter manufacturers ... many are suitable for mobile home and RV water filter use as well as shower filter use and portable water filter applications. Always check on prices of replacement filter cartridges and not just the cost of the water filter unit itself. Major water filter suppliers as far as I can tell ... Brita water filters, Pur water filters, Amatek water purifiers, Culligan water filters, Omni water filters, GE water filters, Frigidaire water purifiers, Kenmore water purifiers, Maytag water filters, Whirlpool, Amana water filter system, Big Blue water filters, Aquasana, Amway purifiers, Sprite water filter systems, KDF water filter, Doulton water filter, Everpure water purifiers, Multipure, Britta purifiers,

Water filters play a very important role in fish ponds.

Koi and goldfish automatically pollute pond water by their normal metabolic processes and in overstocked ponds and water gardens this can prove to be fatal to the fish. Water filters for ponds are called pond bio filters. They consist of containers in which a bed of biomedia is contained. A pump distributes oxygenated pond water through the filter and the water is purified. Read more about the filtering and care of garden fish ponds. You can also download a set of pond calculators designed to make water gardening and pond pump selection easy at Perfect Pond Keeping and read a lot more about good water quality and pond keeping here.

You may well come across these company or brand names in your water filter search... the profusion of water filters makes it critical that you understand this website ...

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