Application Note: Improving Horizon Technology Disk Extraction Technology for US EPA Wastewater Method 625.1
10 October 2018

The US EPA monitors a variety of chemicals in water that may cause harm to humans or wildlife in order to minimize exposure. Method 625 was developed by the Office of Science and Technology in the Clean Water program to monitor a large suite of semivolatile chemicals in wastewater for compliance with the National Pollution Discharge Elimination System (NPDES). NPDES is a system of permitting that regulates the characteristics of water that is released into a waterway, defined by industrial category. The permitting levels are set depending on the waterway’s use. If the waterway is used for recreation or is an important wildlife habitat, the limit may be set lower.