In Toledo, Ohio, Residents Warned Water Unsafe to Drink

A non-login-wall version: http://bigstory.ap.org/article/ohio-city-issues-water-warnin...

I've been curious whether a home RO (Reverse Osmosis) filtration system would filter microcystin. I found two references, both saying it depends on the pore size and contamination level. These sources also mention other purification techniques. PDF warning for both references:

http://www.who.int/water_sanitation_health/dwq/chemicals/mic...

> Dissolved microcystins have been shown to be removed by some reverse osmosis and nanofiltration membranes. As removal will depend of membrane pore size distribution and water quality, site specific tests are recommended

http://water.epa.gov/scitech/swguidance/standards/criteria/n...

> Nanofiltration and reverse osmosis are effective in removing cylindrospermopsin and microcystin. However, site specific tests are recommended as removal efficiency depends on the membrane pore size distribution and water quality.

The bulletin: http://www2.nccos.noaa.gov/coast/lakeerie/bulletin/bulletin_...

And a report from last year: http://www.ijc.org/files/publications/Draft%20LEEP-Aug29Fina...

This not only affects water from faucets, but vegetable hydration at the grocery store, plant irrigation systems and others that I'm failing to think of off the top of my head. This is very serious. Luckily it is only Toledo and not other surrounding areas as well.