I  U  P  A  C

News & Notices

Organizations & People

Standing Committees


..Shortcut Access






Links of Interest

Search the Site

Home Page



Current Project

Chemistry and the Environment Division (VI)
Chemistry and Human Health Division (VII)


Number: 1999-017-1-600 [ 6/3/99 ]

Title: Regulatory limits for pesticide residues in water

Task Group
D. Hamilton


Remarks: Extension of Project 640/41/97 ; Proposed cooperative project with Commission on Soil and Water (VI.3)

Completion Date: 2003 - project completed

To examine the various methodologies for setting standards for permissible levels of pesticide residues in waters and to recommend suitable methodologies and data requirements.

Setting standards for pesticide residues in waters is complex. First we must decide which type of water is relevant to the proposed standard, e.g. drinking water, reservoir water, lakes and streams, ground water, water for aquaculture, irrigation water and drinking water for farm animals. Second, should we adopt a risk assessment based approach or a "no more than reasonable if good practices are followed" approach, or a combination of the two? Different approaches will lead to different maximum limits being set. A standard based on a risk to human health or the environment may allow much higher levels of residue in the water than would ever occur in practice. An arbitrarily chosen maximum limit may be economically wasteful in requiring correction of harmless residues that do not meet the standard while ignoring more hazardous contaminants that are technically not pesticides.


Project completed - IUPAC Technical Report published in Pure Appl. Chem. 75(8), 1123-1155, 2003.

Last Update: 9 September 2003


Page last modified 9 September 2003.
Copyright ©1997-2003 International Union of Pure and Applied Chemistry.
Questions or comments about IUPAC, please contact, the Secretariat.
Questions regarding the website, please contact Web Help.