Some common roofwater contaminants:
what to test for in harvested roofwater
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These are the tests that have already been done on the water from one of the systems
referred to on this website: (the system we describe on this site with Filter 1
removes all of these 18 contaminants to beyond the
requirments of the EPA for drinking water quality.)
- Coliform bacteria
- Total Petroleum Hydrocarbons sometimes called TPH
- Total Organic Carbon sometimes called TOC
- E Coli bacteria
- Fecal Coliform bacteria
At the very minimum do a test for coliform bacteria, and Arsenic. If there is any coliform bacteria present,
it may indicate the presence of other very harmful bacteria. If Arsenic is present above the EPA limits
of 10 parts per billion (.01 mg/L) the water is not safe.
The tests on Filter 4
for CHEMICAL CONTAMINANTS
been done yet.
Other contaminants that may be present but have not been tested for in this research:
- Baylisascaris Procyonis (Raccoon roundworms)
- Viruses (any type)
- Industrial chemicals
Water can be contaminated by just about anything. This is only a list of contaminants that have been discovered in the study
this site refers to. Do not drink or otherwise consume water from any of the sources or filters described on this website without first having it tested by someone who knows how to check for biological and/or chemical contaminants in water.
The study includes information from 50 scholarly articles describing scientific studies on
biological sand water filters; and 61 individual tests on water before and after being run through 7 different
configurations of biological sand filters. All the water quality tests were performed by an EPA certified laboratory.
creative commons attribution share alike license.