
Pesticides in House Dust 201
However, agricultural use of chlorpyrifos and diazinon in Monterey County generally
increased from 1999–2007 (trendline in Figure 1), most notably for diazinon. Non-
agricultural uses in Monterey County (i.e., applications for landscape maintenance,
FIGURE 1 Median chlorpyrifos and diazinon dust concentrations in samples from farmworker
homes in the city of Salinas, CA by year of collection and kilograms applied (trendline) at
the county-level (Monterey County) for agricultural purposes from 1999-2007. † In December
2001 and 2002, residential products containing chlorpyrifos and diazinon, respectively were
canceled. ...