Mercer Island Project, King County - DNRP King County Water and Land Resources Division collected annual benthic macroinvertebrate samples from 1999 to 2008 with the exception of 2004 and 2007 from up to six small watersheds on Mercer Island. This sampling is part of a larger stormwater monitoring project for the City of Mercer Island to assess the effectiveness of drainage basin improvements and supports the municipal stormwater NPDES permit application. In addition to benthic macroinvertebrate sampling, this program measures conventional water quality parameters, nutrients, bacteria, dissolved metals, herbicides, pesticides, sediment metals, and sediment hydrocarbons.

Contact Person: Jo Wilhelm, jo.wilhelm@kingcounty.gov; 206-263-6556

SAP: Follows the same protocols as the King County ambient monitoring