AWWA JAW60537

To evaluate the effect of the treatment process on pesticide concentration, source water andfinished (treated) water samples were collected from 12 community water systems (CWSs)and analyzed for water-soluble pesticides. The pesticides most frequently detected in thesource water were the triazine herbicides (atrazine, cyanazine, prometon, and simazine)and the chloroacetanilide herbicides (acetochlor, alachlor, and metolachlor). Atrazine,metolachlor, prometon, and simazine were detected in the source and finished water ofevery system sampled. Deethylatrazine, a degradate, was detected in the source and finishedwater of every CWS but one. The triazine and chloroacetanilide herbicides were usuallydetected in the finished water after the treatment process, although for most treatmentplants the concentrations were significantly less in the finished water. For other pesticidesdetected in source water, especially the organophosphate insecticides and other sulfur-containingpesticides (diazinon, chlorpyrifos, malathion, and metribuzin), the treatmentprocess either removed or degraded the pesticide completely. Includes 33 references, tables, figures.

Product Details

Edition:

Vol. 96 - No. 10

Published:

10/01/2004

Number of Pages:

13

File Size:

1 file , 350 KB