Abstract
Water samples from 11 wells located in an area of intensive vegetable production on an organic soil were collected in 1981 and 1982, and analyzed for pesticide residues. Residues of diazinon, malathion, allidochlor, linuron, and prometryne were identified in four of the wells.
Water samples from 91 wells were collected from farms on mineral soils across Southern Ontario during 1984 and analyzed for pesticide residues. Atrazine residues (0.1 to 74 μg/L) were present in 11 wells and trifluralin residues (41μg/L) contaminated one well. The highest residue of atrazine (74 μg/L) was present in one well along with contamination of three other herbicides and one insecticide. This was the result of a spill into the drilled well that gave residues of each component between 22 and 125μg/L. After 10 months of cleaning, this well was still contaminated.
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Frank, R., Ripley, B.D., Braun, H.E. et al. Survey of farm wells for pesticides residues, Southern Ontario, Canada, 1981–1982, 1984. Arch. Environ. Contam. Toxicol. 16, 1–8 (1987). https://doi.org/10.1007/BF01055354
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DOI: https://doi.org/10.1007/BF01055354