Herbicide levels in rivers draining two prairie agricultural watersheds

Journal Article · Thu Jan 01 00:00:00 EST 1987 · J. Environ. Sci. Health, Part B; (United States)

DOI:https://doi.org/10.1080/03601238709372557· OSTI ID:6003731

Muir, D C.G.; Grift, N P

A monitoring survey was conducted during 1984 on the Ochre and Turtle Rivers, which flow into Dauphin Lake in western Manitoba, Canada, to determine levels of the herbicides MCPA, diclofop-methyl, dicamba, bromoxynil, 2,4-D, triallate and trifluralin which were widely used in each watershed. Triallate concentrations exceeded 4 ng/L in 50% and 10% of the 21 samples taken from each of the Turtle and Ochre River, respectively, during the period March to October 1984. Trifluralin concentrations exceeded 3 ng/L in 14% and 10% of the samples from the respective rivers. Maximum concentrations did not exceed 25 ng/L and were unrelated to changes in river flow. Bromoxynil and diclofop were detected in the Turtle River, at concentrations of 113 and 476 ng/L, respectively, following a major high water event in late June, but were undetectable (<2 and 12 ng/L, respectively) at other sampling times. Dicamba and 2,4-D were detectable.

• Research Organization: Dept. of Fisheries and Oceans, Freshwater Institute, 501 University Crescent, Winnipeg R3T 2N6
• OSTI ID: 6003731
• Journal Information: J. Environ. Sci. Health, Part B; (United States), Vol. B22:3
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AGRICULTURE
HERBICIDES
ECOLOGICAL CONCENTRATION
MANITOBA
WATER QUALITY
RIVERS
ENVIRONMENTAL TRANSPORT
DETECTION
DRAINAGE
HYDROLOGY
POLLUTANTS
QUANTITY RATIO
SAMPLING
SURVEYS
WATER POLLUTION MONITORS
WATERSHEDS
CANADA
ENVIRONMENTAL QUALITY
INDUSTRY
MASS TRANSFER
MEASURING INSTRUMENTS
MONITORS
NORTH AMERICA
PESTICIDES
STREAMS
SURFACE WATERS
500200* - Environment
Atmospheric- Chemicals Monitoring &amp; Transport- (-1989)