Boiling not effective?

Thomas Linton said:
2009 data. Things change. There are several filters certified by the Gov to filter viruses. Sawyer came out with the first. Once it was no longer "impossible," other filtering technology was found that does the same.
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Been reading all the test reports and the general information on the Sawyer website

There are no claims about viruses for the standard 0.1 micron filters, which is inline with the PDF not rating any filters for viruses
 
neeman said:
Been reading all the test reports and the general information on the Sawyer website

There are no claims about viruses for the standard 0.1 micron filters, which is inline with the PDF not rating any filters for viruses
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And they now make a .02 micron absolute filter.

If viruses are an issue, we offer the Point ZeroTWO Purifier (0.02 micron absolute pores). This is the first and thus far only portable purification device to physically remove viruses. And it does it at a >5.5 log (99.9997%) rate, exceeding EPA and NSF recommendations.
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Section Hiker: " Both the Sawyer and the First Need are the only EPA approved filters on the market capable of filtering giardia, cryptosporidium, and viruses."

REI: "The [Sawyer]0.02-micron hollow fiber membrane purifier physically removes particles, protozoa, bacteria and viruses while maintaining a good rate of flow."

NY Times: "A study by the government-funded body that conducts research on communicable diseases and viruses evaluated eight domestic water purifier brands. It found only two - one equipped with a hollow fibre membrane [Sawyer] and the other with a gravity-fed filter - could completely remove the viruses. "

Geigerrig
"Tested and Certifed
removes:
≥99.9% Protozoans (Cryptosporidium and Giardia)
≥99.9999% Bacteria (Raoutella terrigena)
≥99.99% Virus (MS-2 Bacteriophage)"
 
When Sawyer uses Filter systems like the Mini and the Squeeze are 0.1 micron and not rated for viruses
When Sawyer uses Purifier like the Sawyer Point Zero Two Water Purifier with Bucket Adapter is 0.02 microns and therefore removes viruses, and costs more money
 
DOC-CANADA said:
Recently, I read the following on the Weather Network (click on "Weather Network" to see the article.)

Residents were advised, because of an algae bloom to "not to brush their teeth with or boil the water because that would only increase the toxin's concentration."

(If you click on one of the links, there seems to be some controversy whether or not the advisory was ever issued.)

However, I was always under the impression that boiling the water would remove any hazard such as presented above. Does anybody have any more information regarding this seeming anomaly?

Doc
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Exactly, boiling water will make your water drinkable in the terms of biological/pathogens, but will not remove mercury, iron, sulfur, and other pollutants found in Lake Erie. 1 minute at sea level, 3 minutes at elevation. Sawyer filters do not filter for heavy metals and other chemical contaminents. Charcoal filters also lack the ability to remove 100% of pollutants.

Seems Ohio knew it had a problem and chose to do nothing to regulate the industry causing the pollution. What a shame. Even back in 2012 officials couldn't be bothered to make water safe for their constituents. http://chronicle.northcoastnow.com/files/2012/06/Mercury-Great-Lakes-report_13.pdf

An interesting interactive map showing the stressors causing the hypoxia. http://greatlakesmapping.org/great_lake_stressors
 
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