USGS - science for a changing world

South Atlantic Water Science Center - Georgia

  home   information/data   projects   publications   GWIN   RiverCam   drought   flood   about   contact

 

DATA CENTER

USGS IN YOUR STATE

USGS Water Science Centers are located in each state.

There is a USGS Water Science Center office in each State. Washington Oregon California Idaho Nevada Montana Wyoming Utah Colorado Arizona New Mexico North Dakota South Dakota Nebraska Kansas Oklahoma Texas Minnesota Iowa Missouri Arkansas Louisiana Wisconsin Illinois Mississippi Michigan Indiana Ohio Kentucky Tennessee Alabama Pennsylvania West Virginia Georgia Florida Caribbean Alaska Hawaii New York Vermont New Hampshire Maine Massachusetts South Carolina North Carolina Rhode Island Virginia Connecticut New Jersey Maryland-Delaware-D.C.

Assessment of pyrethroid pesticides in watersheds of variable land use in Georgia

Background

USGS scientists taking a streambed sample for water-quality analysis. Credit: Alan Cressler

Pyrethroid insecticides have been in use for many years in the U.S., but their use in urban and in agricultural areas of the Southeastern U.S. is increasing over the past few years because of regulatory restrictions on organochlorine, organophosphate and carbamate pesticides, the effectiveness that pyrethroid insecticides have been demonstrated to have in controlling insect pests, and the low toxicity that pyrethroids have to mammalians (Elliott, 1976; Elliott and others, 1978; Casida, 1980). The USGS-National Water Quality Assessment Program (NAWQA) has documented reductions in concentrations of compounds such as diazinon in urban streams, but a key unanswered question is whether the increased use of pyrethroid insecticides is of concern for aquatic health (U.S. Geological Survey, 1999; Gilliom and others, 2006; Hladik and Kuivila, 2008a).

Toxicological and environmental studies have shown that many of the commonly used pyrethroids have significant non-target toxicity to beneficial insects, fish, and invertebrates when these compounds reach the aquatic environment (Ingersoll and others, 2001; MacDonald and others, 2000). A recent national study of urban bed sediments has found a forty percent occurrence of a commonly used pyrethroid, bifenthrin, in urban and rural sediments, including a sixty percent occurrence in Atlanta urban streams (Moran and others, 2008; Hladik and others, 2008b). Concentrations measured in environmental samples are known to be toxic to aquatic invertebrates under laboratory conditions (Kemble and others, 2008). This USGS and Georgia Department of Agriculture cooperative study will provide a basic status assessment of the types and levels of pyrethroids found in stream water and bed sediments from watersheds ranging from rural to agricultural and to urban land use. Samples will be taken over multiple seasons to determine if fluctuations in use can coincide with levels found in streams.

Web sites of interest

USGS Home Water Climate Change Core Science Ecosystems Energy and Minerals Env. Health Hazards

Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://ga.water.usgs.gov/projects/gda/index.html
Page Contact Information: webmaster-ga@usgs.gov
Page Last Modified: Friday, 03-Oct-2014 07:24:55 EDT