Food × analyte
DDE p,p' on winter squash
1998–2021 · 10 tested years
4,738samples tested
for this analyte
for this analyte
98samples with
a detection
a detection
2.1%of analyte-tested samples
Testing detected DDE p,p' in 98 of 4,738 winter squash samples actually tested for this analyte. This percentage uses analyte-tested samples, not all 5,178 samples of this food.
Year-by-year results
Actual tested and detected sample counts.
10 tested years between 1998 and 2021. Gaps mean no validated tests in this release.
Read the yearly counts
| Year | Tested | Detected | Rate |
|---|---|---|---|
| 1998 | 530 | 10 | 1.9% |
| 1999 | 246 | 1 | 0.4% |
| 2000 | Not tested | — | — |
| 2001 | Not tested | — | — |
| 2002 | Not tested | — | — |
| 2003 | Not tested | — | — |
| 2004 | 364 | 7 | 1.9% |
| 2005 | 731 | 1 | 0.1% |
| 2006 | 369 | 2 | 0.5% |
| 2007 | Not tested | — | — |
| 2008 | Not tested | — | — |
| 2009 | Not tested | — | — |
| 2010 | Not tested | — | — |
| 2011 | 186 | 16 | 8.6% |
| 2012 | 742 | 17 | 2.3% |
| 2013 | 187 | 4 | 2.1% |
| 2014 | Not tested | — | — |
| 2015 | Not tested | — | — |
| 2016 | Not tested | — | — |
| 2017 | Not tested | — | — |
| 2018 | Not tested | — | — |
| 2019 | Not tested | — | — |
| 2020 | 677 | 19 | 2.8% |
| 2021 | 706 | 21 | 3.0% |
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: 1998, 1999, 2004, 2005, 2006, 2011, 2012, 2013, 2020, 2021.