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The Center for Disease Control and Prevention focuses on the health and safety
of the public. H2O is one of the most important resources the association
concentrates on because people are exposed to it everyday. Water has the ability
to be helpful to the health of individuals by providing hydration but if the
H2O contains particles or diseases, it can be very dangerous to the immune
system. The CDC holds high standards for the water the public is exposed to and
supports the use of water filters to assure the removal of many particles and
contaminants. The Division of Parasitic Diseases looks out for the health of the
public's H2O and has offered insight into which filters are good for the
home's water.
The CDC states that one of the most hazardous parasites that can be carried in
H2O is cryptosporidium. These parasites can cause a disease called
cryptosporidiosis which causes uncomfortable symptoms such as diarrhea and can
live in the body for long periods of time. While most water is safe from
particles of cryptosporidium, water filters can still be used in the home to
assure the removal of even the smallest particles in the H2O. Water filters
that use reverse osmosis are the most effective at the removal of parasites.
These filters use a membrane to filter the water through and even the
smallest of particles, parasites or bacteria are removed from the water before
it flows through. There are many other types of water filters that work by microstraining and are proven to be just as efficient at the removal of
parasites. Water filters that use a filter with a pore size of one micron or
less are the most effective at removing small parasites and particles such as
cryptosporidium.
Water filters that contain one micron sized filters are able to remove microbes
that are one micron or greater in size, including most of the parasites and
bacteria that may still be present in the H2O. There are two types of water
filters that are able to remove particles that are one micron or larger in size.
These water filters are called either “absolute one” filters or “nominal one”
filters. Absolute one filters may be more effective at removing particular
parasites such as cryptosporidium. Nominal one water filters may still allow
about 20% to 30% of microbes that are one micron in size.
NSF testing is available for most water filters to determine if the units are
effective in the removal of cryptosporidium. The NSF trademark on the boxes of
filters is the best indicator that the unit is efficient at removing the
parasites. The words “cyst removal” or “cyst reduction” also refers to the water
filter's ability to remove the parasites from the water. However, since NSF
testing is expensive, some companies may not put their products through the NSF
certification. There are some water filters on the market that are extremely
efficient at the removal of parasites but may not have the NSF trademark on the
box. Filters that use reverse osmosis or contain a filter with an absolute
pore size of one micron or smaller are generally effective at removing parasites
and more than likely would pass the NSF testing for cyst reduction.
Some of the water filters that may not be classified for the removal of
cryptosporidium include carbon filters, chlorine removers and water softeners.
In order for filters that do remove parasites to work properly, the consumer
should keep the filter maintained and clean. By not replacing materials when
needed, the consumer runs the risk of water filters failing to remove parasites
from the water. A clean and efficient filter is able to more effectively remove
parasites, particles and bacteria from the H2O.
Thanks to the help of the CDC, many people know now what to look out for in
their home water. While there are high standards set for the cleanliness of tap
H2O, filters can help to make the water even safer and better tasting.
There are many types of water filters but the problem of parasites such as
cryptosporidium can be addressed with reverse osmosis and absolute one micron
water filters. Every type of water filter has different bacteria or contaminants
it specializes in removing and the consumer should know which toxins are
important for removal of their home tap H2O. The CDC and Division of Parasitic
Diseases encourage the use of water filters to remove different types of
contaminants and parasites. Through water filters, many people have found better
tasting and safer home H2O.
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