From the Grand Junction Daily Sentinel (Jo Holcomb):
Gray water contains household products, such as shampoos or detergents, and the effect on the environment is virtually not known at this time. That’s why CSU professors Sybil Sharvelle and Larry Roesner started a three-year research project to study the effects of irrigating with gray water. Specifically, the researchers are looking for negative effects on humans or plants. That’s where the city of Grand Junction Environmental Laboratory comes into play. The laboratory, in conjunction with Denis Reich, Western Slope water specialist, performed tests on bacteria for the study. From January through March 2009, gray water from baths, showers, sinks and washing machines was collected by volunteers from Curtis Swift’s master gardener class, at CSU Cooperative Extension Service. These samples were delivered to the city of Grand Junction Environmental Laboratory, which conducted the monitoring on total coliform and E.coli bacteria. Results of these cultures will be used in the researchers’ study.
More Coyote Gulch gray water reclamation coverage here.