Central Columbia Plateau - Yakima River Basin NAWQA Study - Publications
Samples from 53 wells (15 shallow monitoring wells and 38 deeper public supply or domestic wells) and 11 surface-water sites were collected between 1993 and 1995 and analyzed for 84 pesticides. Ground water (but not surface water) was also analyzed for 60 VOCs. All of the wells were sampled one time; Palouse River at Hooper was sampled one to three times a month from March 1993 to May 1994 and up to six times a month during storms between November 1994 and February 1995, and the other 10 surface-water sites were sampled during storms and periods of low flow.
[Y, yes; N, no; --, not analyzed]Detected in Active ingredient surface ground Pesticide applied (lbs/year)1 water? water? --------- ------------------ ------ ------ Triallate 236,800 Y N 2,4-D 102,400 Y N Diuron 80,200 Y N Imazethapyr 36,700 -- -- Bromoxynil 36,000 Y N MCPA 33,000 Y N Glyphosate 26,700 -- -- Thiabendazole 23,400 -- -- Benomyl 21,300 -- -- Diclofop 19,600 -- -- Paraquat 14,900 -- -- Disulfoton 14,200 N N Metribuzin 11,400 Y N Dicamba 11,300 Y N Dimethoate 8,600 -- -- Trifluralin 7,400 Y N DCPA 5,700 Y N Thiophanate methyl 5,700 -- -- Phosmet 5,700 -- -- Ethalfluralin 5,100 Y N 1 From Anderson and Gianessi (1995)
USGS Fact Sheet 204-96
by Lonna M. Roberts and Richard J. Wagner
October 1996
Anderson, J.E., and Gianessi, L.P., 1995, Pesticide use in the Central Columbia Plateau: National Center for Food and Agricultural Policy, [100] p.Nowell, L.H., and Resek, E.A., 1994, Summary of national standards and guidelines for pesticides in water, bed sediment, and aquatic organisms and their application to water-quality assessments: U.S. Geological Survey Open-File Report 94-44, 115 p.
U.S. Environmental Protection Agency, 1992, Definition and procedure for the determination of the method detection limit - revision 1.11, Code of Federal Regulations, 40. Protection of Environment, CFR Part 136, Appendix B, p. 565-567.
U.S. Environmental Protection Agency, February 1996, Drinking water regulations and health advisories: Washington D.C., Office of Water, U.S. Environmental Protection Agency, EPA 822-R-96-001, 14 p.
For further information contact:
Project Chief
CCYK NAWQA
U. S. Geological Survey
1201 Pacific Ave., Suite 600
Tacoma, WA 98402
Phone:(253) 593-6530 ext 2687; -6514 fax
E-mail: rwblack@usgs.gov
Suggested citation:
Roberts, L.M. and Wagner, R.J., 1996, Pesticides and Volatile Organic
Compounds in Ground and Surface Water of the Palouse Subunit, Washington and
Idaho: U.S. Geological Survey Fact Sheet 204-96, on-line at <URL: http://wa.water.usgs.gov/ccyk/fs-204-96.html>,
accessed October 17, 1997
.
For a paper copy of this report, send Email to: rwblack@usgs.gov