You Can Prevent Cryptosporidiosis
How Can I Protect Myself from Crypto? continued...
A. Boiling water: Boiling is
the best extra measure to ensure that your water is free of crypto and other
germs. Heating water at a rolling boil for 1 minute kills crypto, according to
CDC (Centers for Disease Control and Prevention) and EPA (Environmental
Protection Agency) scientists. After the boiled water cools, put it in a clean
bottle or pitcher with a lid and store it in the refrigerator. Use the water
for drinking, cooking, or making ice. Water bottles and ice trays should be
cleaned with soap and water before use. Do not touch the inside of them after
cleaning. If you can, clean water bottles and ice trays yourself.
B. Filtering tap water: Not all
available home water filters remove crypto. All filters that have the words
"reverse osmosis" on the label protect against crypto. Some other types
also work, but not all filters that are supposed to remove objects 1 micron or
larger from water are the same. Look for the words "absolute 1 micron."
Some "1 micron" and most "nominal 1 micron" filters will not
work against crypto. Also look for the words "Standard 53" and the
words "cyst reduction" or "cyst removal" for an NSF-tested
filter that works against crypto.
To find out if a particular filter removes
crypto, contact NSF International (3475 Plymouth Road, P.O. Box 130140, Ann
Arbor, MI 48113-0140; telephone 1-800-673-8010; fax 313- 769-0109), an
independent testing group. Ask NSF for a list of "Standard 53 Cyst
Filters." Check the model number on the filter you intend to buy to make
sure it is exactly the same as the number on the NSF list. Look for the
NSF trademark on filters, but be aware that NSF tests filters for many
different things. Because NSF testing is expensive, many filters that may work
against crypto have not been tested. Reverse osmosis filters work against
crypto whether they have been tested by NSF or not. Many other filters not
tested by NSF also work if they have an absolute pore size of 1 micron or