25 Methods to Purify Water

25 Methods to Purify Water


SEDIMENTATION gravitationally settles heavy suspended material.
BOILING WATER for 15 to 20 minutes kills 99.9% of all living things and vaporizes most chemicals.  Minerals, metals, solids and the contamination from the cooking container become more concentrated.
DISTILLATION boils and recondenses the water, but many chemicals vaporize and recondense in concentration in the output water.  It is also expensive to boil & cool water.
ULTRAVIOLET LIGHT is a good bactericide, but has no residual kill, and works only in clearly filtered water.   Still in its infancy stage is a new technology involving super white light.


CHLORINE is common, cheap, but extremely toxic.  It does not decrease physical or chemical contamination, it does increase cholesterol formations, is a carcinogen, and causes heart disease.
BROMINE, used in pools and spas, doesn’t smell or taste as bad and doesn’t kill bacteria very well.
IODINE is not practical and is mostly used by campers.
HYDROGEN PEROXIDE kills bacteria with oxygen, is chemically made and is very toxic.  It is used in emergencies.
SILVER is an effective bactericide but a cumulative poison which concentrates and doesn’t evaporate.
NONTOXIC ORGANIC ACIDS should be used with caution in large water plants only.
LIME AND MILD ALKALINE AGENTS should also be used with caution only by large water plants, or only for laundry.
NEUTRALIZING CHEMICALS react with the unwanted chemicals and produce outgases and a sediment, but levels of need vary.
COAGULATION-FLOCCULATION adds chemicals which lump together suspended particles for filtration or separation.
ION EXCHANGE exchanges sodium from salt for calcium or magnesium, using either glauconite (greensand), precipitated synthetic organic resins, or gel zeolite, thus softening the water.  Minerals, metals, chemicals or odors are not affected, and the water is salty to drink.


SLOW SAND of 1 cubic meter passes about 2 liters/minute and does a limited bacteria removal.
PRESSURE SAND of 1 cubic meter passes about 40gpm and must be backwashed daily.
DIATOMACEOUS EARTH removes small, suspended particles at high flow rates, must be daily backwashed and is expensive.
POROUS STONE/CERAMIC filters are small but expensive, and do not affect chemicals, bacteria or odors.
PAPER or CLOTH filters are disposable and filter to one micron, but do not have much capacity.
-COMPRESSED CHARCOAL/CARBON BLOCK is the best type of charcoal filter, can remove chemicals and lead, but is easily clogged,  so  should be used with a sediment prefilter.
-GRANULAR CHARCOAL is cheaper, but water can flow around the granules without being treated.
-POWDERED CHARCOAL is a very fine dust useful for spot cleaning larger bodies of water but is messy and can pass through some filters and be consumed.
REVERSE OSMOSIS uses a membrane with microscopic holes that require 4 to 8 times the volume of water processed to wash it in order to remove minerals and salt, but not necessarily chemicals and bacteria.
ENZYMES &BACTERIA combined can remove contaminants, reduce sludge, and even digest oil. See recent article on enzymes & bacteria.
PLANTS There are numerous plants, animals and organisms that are quite effective in filtering water.


AERATION sprays water into the air to raise the oxygen content, to break down odors, and to balance the dissolved gases.  However, it takes space, is expensive, and picks up contaminants from the air.
OZONE is a very good bactericide, using highly charged oxygen molecules to kill microorganisms on contact, and to ozidize and flocculate iron, manganese and other dissolved minerals for post-filtration and backwashing.
ELECTRONIC PURIFICATION and DISSOLVED OXYGEN GENERATION creates super oxygenated water in a dissolved state that lowers the surface tension of the water and effectively treats all three types of contamination: physical, chemical and biological.

3 Unbeatable Reasons To Invest in a Home Water Purification System

Home Water Purification System

Did you know that about 70% of our body is water? The body needs water to run vital processes and normal functioning. That is why it is vital to consume clean and pure water. However, the quality of water is not the same everywhere.  As a result, an increasing number of homeowners are now installing Water Filtration Systems.

If you notice filthy, gross, or foul-smelling water coming through your taps, consider it as a sign to install a home water purification system! And you would be surprised to know that there are more than health benefits with such installations!

If you notice filthy, gross, or foul-smelling water coming through your taps, consider it as a sign to install a home water purification system! And you would be surprised to know that there are more than health benefits with such installations!

Stay healthy with clean water consumption!

Other than minerals, your water supply may consist of contaminants, heavy metals, and other minute particles. And consuming it can’t be good for you. A reliable, high-quality water purification system can ensure that the water you are drinking is clean and free of contaminants.

Smart Investment

Installing a water filtration system may appear expensive upfront compared to buying bottled water. Imagine how much a lifetime supply of bottled water would cost as compared to a one-time installation of a water filtration and treatment system. Do the math yourself!

And this is why a home water purification system is a smart investment!

Environmentally Friendly

Environmental degradation is no secret. Both land and oceans are polluted with plastic litter. Ain’t that the truth? And consuming plastic bottled water means you are contributing to the problems of the planet.

Installing a state-of-the-art, electronic ionization, chemical-free, titanium oxidation and multimedia filtration in your home, like ECOsmarte by Whidbey Water Filters on Whidbey Island, is an easy yet great contribution towards a  healthy, safe, and cleaner environment.

Curious about where to find reliable and efficient water filtration systems on Whidbey Island? Get in touch with Whidbey Water Filters on 206-324-5055 for stand-alone or whole-house water treatment systems.

Interesting Water Facts

​Interesting Facts About NOT Drinking Water

7 Benefits of Drinking Warm Water with Lemon

10 Benefits of Drinking Hot Water

New Study: Drink THIS Much Water Daily

How much water should you drink every day? The latest study from researchers at the University of Utah in Salt Lake City concludes that the old standby of eight glasses a day still holds. Here’s the surprising gotcha: If you don’t drink enough water, the greatest effect may not be physical–it’s mental and emotional. Drink just half the recommended amount of water, and you’ll likely suffer from mild dehydration. You’ll also have less energy, and you won’t be able to concentrate and focus as you normally would.

“For people who aren’t exercising a lot or living in a very warm climate, eight glasses of water a day may be a good rule of thumb,” lead researcher Dr. Wayne Askew told Reuters. If you do exercise and sweat a lot, then you need more than eight glasses to properly hydrate your body. Our bodies need water, primarily because water makes up more than 70 percent of solid body tissue. It helps regulate body temperature, carries nutrients and oxygen to cells, removes waste, cushions joints, and protects organs and tissues, explains Reuters. Too little water can cause headaches, grogginess, and dry, itchy skin. When we become severely dehydrated, it can affect our blood pressure, circulation, digestion, kidney function, and nearly all body processes.

The experiment: For 12 weeks, 10 thirsty college students each drank four, eight, or 12 eight-ounce glasses of water per day in four-day test cycles. Between the test cycles the students consumed the amount of water they normally would, as well as during one other week during the study period. The students’ hydration status was measured at the end of each four-day water consumption cycle. They also answered questions about their general well being.

The results: Drinking four glasses of water caused the students’ blood plasma volume to fall five percent below those who drank eight glasses of water. Four glasses of water also produced more highly concentrated urine. Still, these physical symptoms of dehydration are considered mild–a suboptimal hydration level. What surprised the researchers was the effect this mild dehydration had on the students’ well being. Reuters reports that when students drank the least amount of water, they reported feeling less energetic and less focused than when they drank more water.

If eight glasses of water a day is good, is more than that even better? Probably not, although it won’t hurt you. Those who drank 12 glasses had blood plasma volumes that were 10 percent higher, but their well being was not impacted positively or negatively. The findings were presented at the annual Experimental Biology meeting in San Diego, California

Related Web Sites

Following are some links to web sites related to Whidbey Water Filters:

http://www.EnviroAlternatives.com (detailed information on water, the world, and alternative solutions for the environment https://www.fridgefilters.com/
https://www.multipureusa.com/dean (point-of use systems: sinks, showers, travel)