Food × analyte
Chlorpyrifos on wheat grain
1995–2006 · 5 tested years
2,924samples tested
for this analyte
for this analyte
214samples with
a detection
a detection
7.3%of analyte-tested samples
Testing detected Chlorpyrifos in 214 of 2,924 wheat grain samples actually tested for this analyte. This percentage uses analyte-tested samples, not all 3,224 samples of this food.
Year-by-year results
Actual tested and detected sample counts.
5 tested years between 1995 and 2006. Gaps mean no validated tests in this release.
Read the yearly counts
| Year | Tested | Detected | Rate |
|---|---|---|---|
| 1995 | 600 | 117 | 19.5% |
| 1996 | 340 | 49 | 14.4% |
| 1997 | 623 | 40 | 6.4% |
| 1998 | Not tested | — | — |
| 1999 | Not tested | — | — |
| 2000 | Not tested | — | — |
| 2001 | Not tested | — | — |
| 2002 | Not tested | — | — |
| 2003 | Not tested | — | — |
| 2004 | Not tested | — | — |
| 2005 | 674 | 4 | 0.6% |
| 2006 | 687 | 4 | 0.6% |
Testing panels and detection limits change. These observations do not establish a causal trend.
About these results
Source: USDA Pesticide Data Program. Included annual releases: 1995, 1996, 1997, 2005, 2006.