Michael Focazio, PhD (Former Employee)
Science and Products
Filter Total Items: 68
Complex Mixture of Contaminants Persists in Streams Miles from the Source
Natural processes in stream ecosystems such as dilution and microbial degradation are known to attenuate some contaminants to below levels that can cause harm to ecosystems. However, a team of U.S. Geological Survey (USGS) scientists has shown that many chemicals discharged from municipal wastewater treatment facilities persist for miles downstream at levels known, or suspected, to cause adverse...
Hormones in Land-Applied Biosolids Could Affect Aquatic Organisms
Hormones from biosolids applied to fields may be present in rainfall runoff at concentrations that are high enough to impact the health of aquatic organisms if the runoff reaches streams, report scientists from the U.S. Geological Survey (USGS) and Colorado State University in Environmental Science and Technology. Artificial rainfall runoff from agricultural test plots where biosolids were applied...
New Knowledge on the Fate and Transport of Emerging Contaminants in Rivers
A detergent degradation product (4-nonylphenol) and a biogenic hormone (17β-estradiol) added to the Redwood River, Minnesota, were attenuated by biodegradation and other natural processes. These are the findings of a team of U.S. Geological Survey (USGS) and University of Colorado scientists.
Improvements in Wastewater Treatment Reduces Endocrine Disruption in Fish
A team of scientists from the U.S. Geological Survey (USGS), the University of Colorado, and the City of Boulder, Colorado, demonstrated that improvements to the treatment process at a wastewater treatment facility (WWTF) reduced the level of endocrine disruption in fish exposed to wastewater effluent discharged from the facility. It is difficult to anticipate the effects that upgrading WWTF...
USGS Publishes its First Environmental Health Science Strategy
The new U.S. Geological Survey (USGS) Environmental Health Science Strategy is one of seven recently released science strategies that span the portfolio of USGS science. Climate and Land Use Change Core Science Systems Ecosystems Energy and Mineral Resources Environmental Health Natural Hazards Water
Antibiotics in Groundwater Affect Natural Bacteria
U.S. Geological Survey (USGS) scientists have documented adverse health effects on populations of native soil bacteria exposed to levels of the antibiotic (SMX) below those used to treat diseases (subtherapeutic). Because SMX has been found in environmental waters by many previous studies, the scientists conducted laboratory exposure experiments to determine the effect of SMX on native bacteria...
Science and Products
Filter Total Items: 68
Complex Mixture of Contaminants Persists in Streams Miles from the Source
Natural processes in stream ecosystems such as dilution and microbial degradation are known to attenuate some contaminants to below levels that can cause harm to ecosystems. However, a team of U.S. Geological Survey (USGS) scientists has shown that many chemicals discharged from municipal wastewater treatment facilities persist for miles downstream at levels known, or suspected, to cause adverse...
Hormones in Land-Applied Biosolids Could Affect Aquatic Organisms
Hormones from biosolids applied to fields may be present in rainfall runoff at concentrations that are high enough to impact the health of aquatic organisms if the runoff reaches streams, report scientists from the U.S. Geological Survey (USGS) and Colorado State University in Environmental Science and Technology. Artificial rainfall runoff from agricultural test plots where biosolids were applied...
New Knowledge on the Fate and Transport of Emerging Contaminants in Rivers
A detergent degradation product (4-nonylphenol) and a biogenic hormone (17β-estradiol) added to the Redwood River, Minnesota, were attenuated by biodegradation and other natural processes. These are the findings of a team of U.S. Geological Survey (USGS) and University of Colorado scientists.
Improvements in Wastewater Treatment Reduces Endocrine Disruption in Fish
A team of scientists from the U.S. Geological Survey (USGS), the University of Colorado, and the City of Boulder, Colorado, demonstrated that improvements to the treatment process at a wastewater treatment facility (WWTF) reduced the level of endocrine disruption in fish exposed to wastewater effluent discharged from the facility. It is difficult to anticipate the effects that upgrading WWTF...
USGS Publishes its First Environmental Health Science Strategy
The new U.S. Geological Survey (USGS) Environmental Health Science Strategy is one of seven recently released science strategies that span the portfolio of USGS science. Climate and Land Use Change Core Science Systems Ecosystems Energy and Mineral Resources Environmental Health Natural Hazards Water
Antibiotics in Groundwater Affect Natural Bacteria
U.S. Geological Survey (USGS) scientists have documented adverse health effects on populations of native soil bacteria exposed to levels of the antibiotic (SMX) below those used to treat diseases (subtherapeutic). Because SMX has been found in environmental waters by many previous studies, the scientists conducted laboratory exposure experiments to determine the effect of SMX on native bacteria...