Synoptic Study Benthic invertebrates and algae to assess effects of urban and agricultural land use. Once in 1994 and once in 1995. Existing supply wells in principal aquifers in Las Vegas area, Reno-Sparks area, and Carson Valley. Once in 1995. Special studies Irrigation Drainage Streamflow, major chemical constituents, nutrients, trace elements, and pesticides in water and trace elements in bottom sediment to determine major sources and loads.
Irrigation drains in Carson Desert.
Endocrine Disruption Organochlorine pesticides, PCBs, dioxins, furans, and semivolatile organic compounds in water, bottom sediment, semi-permeable membrane devices, and carp to determine occurrence. Sex-steroid hormones in carp to assess endocrine systems. Las Vegas Wash and Las Vegas Bay, Callville Bay, Colorado River inlet, Virgin River inlet, and Muddy River inlet of Lake Mead.