Carbaryl, Carbofuran, and Methomyl - National Marine Fisheries ...

Depth of aquatic habitat
(meters)
Buffer to Aquatic Habitat (ft) Average Initial
Concentration in Surface
Water (μg/L)
0.5 120 3 1
0.1 120 3 6
Ground Application, Low Boom, ASAE very fine-fine distribution, 50 th percentile
2 0 1 4
1 0 1 8
0.5 0 1 15
0.1 0 1 76
2 25 2 1
1 25 2 1
0.5 25 2 2
0.1 25 2 11
2 120 3 0.2
1 120 3 0.4
0.5 120 3 1
0.1 120 3 4
Ground Application, High Boom, ASAE very fine-fine distribution, 50 th percentile
2 0 1 13
1 0 1 26
0.5 0 1 52
0.1 0 1 261
2 25 2 3
1 25 2 6
0.5 25 2 13
0.1 25 2 64
2 120 3 1
1 120 3 2
0.5 120 3 3
0.1 120 3 17
1
Carbaryl and carbofuran labels do not require buffers to aquatic habitats.
2
Buffer to aquatic habitats specified on current methomyl product labels, as required by the 1998
methomyl RED.
3
Voluntary “interim bulletin” measures developed by California Department of Pesticide Regulation to
protect threatened and endangered species.
Monitoring Data: Measured Concentrations of Carbaryl, Carbofuran, Methomyl,
1­Napthol and 3­Hydroxyfuran
Data Described in USEPA’s Biological Evaluations
The BE for carbofuran (EPA 2004) summarized national scale surface water monitoring data
available from the USGS NAWQA program and also provided state level summaries based on
NAWQA and CDPR data. It should be noted that some USGS data are also reported in the
CDPR database. National scale NAWQA data (1991-2001) were presented by land use
category, and included information on reporting limits (0.02 μg/L), frequency of detections, and
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