Tuesday, September 03, 2013

EPA Updates Human Health Benchmarks for Pesticides

EPA has updated its list of human health benchmarks for pesticides. EPA develops the benchmarks for use by states and water systems in determining whether the detection of a pesticide in drinking water or source waters for drinking water may indicate a potential health risk. This year, EPA added 11 new benchmarks to the list, revised 10 of the benchmarks published in 2012 to reflect new scientific information and added cancer effects benchmarks for 40 of the pesticides

Visit EPA's Human Health Issues | Pesticides for more information
or visit EPA's Pesticide Chemical Search for information about specific pesticides
Source: EPA Water Headlines (8/29/2013) & EPA Website

EPA Finalizes Freshwater Criteria for Ammonia

EPA has published final national recommended water quality criteria for the protection of aquatic life from the toxic effects of ammonia in freshwater. The 2013 ammonia criteria reflect new data on sensitive freshwater mussels and snails, incorporate scientific views EPA received on its draft 2009 criteria, and supersede EPA's previously recommended 1999 ammonia criteria. In addition to the criteria document, EPA has also published supporting information to assist states, territories, and authorized tribes considering adoption of the new recommended criteria into their water quality standards. Ammonia is a type of nitrogen pollution and can enter water bodies via municipal wastewater discharges, animal waste runoff, air deposition, and runoff from agricultural lands. When ammonia is present in water at high enough concentrations, aquatic organisms cannot sufficiently excrete it, leading to toxic buildup in their internal tissues and blood, and potentially death.

Visit EPA's Aquatic Life Criteria Site for more information
Source: EPA Water Headlines (8/27/2013)