GUIDELINES / 1.0 Water Quality
1.14 Buffers for Pesticides
Pesticides in runoff occur either as sediment-bound or in a dissolved form. Dissolved pesticides are generally the most susceptible to leaving an application area and becoming a pollution problem. Pesticide properties can provide some guidance on the mobility of the pesticide.
Key Design Considerations
- Some pesticides adsorb strongly to soils while others adsorb weakly as noted by the Koc value or soil adsorption index. See table below for recommendations.
- Pesticides with high water solubilities (e.g., > 30 ppm) will generally require wider buffers.
- Pesticides with longer half lives (e.g., greater than 30 days) may require wider buffers.
- Other pesticide best management practices should be used to in addition to buffers (see 5.1 to 5.4).
- See 1.19 for buffer width recommendations.
Pesticide properties can be found on product labels.DOWNLOAD: 1.14 Guidelines and References (PDF)