Food × analyte
Heptachlor epoxide on winter squash
1997–2021 · 11 tested years
4,263samples tested
for this analyte
for this analyte
45samples with
a detection
a detection
1.1%of analyte-tested samples
Testing detected Heptachlor epoxide in 45 of 4,263 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.
11 tested years between 1997 and 2021. Gaps mean no validated tests in this release.
Read the yearly counts
| Year | Tested | Detected | Rate |
|---|---|---|---|
| 1997 | 74 | 4 | 5.4% |
| 1998 | 121 | 2 | 1.7% |
| 1999 | 106 | 0 | 0.0% |
| 2000 | Not tested | — | — |
| 2001 | Not tested | — | — |
| 2002 | Not tested | — | — |
| 2003 | Not tested | — | — |
| 2004 | 364 | 3 | 0.8% |
| 2005 | 731 | 7 | 1.0% |
| 2006 | 369 | 2 | 0.5% |
| 2007 | Not tested | — | — |
| 2008 | Not tested | — | — |
| 2009 | Not tested | — | — |
| 2010 | Not tested | — | — |
| 2011 | 186 | 2 | 1.1% |
| 2012 | 742 | 9 | 1.2% |
| 2013 | 187 | 1 | 0.5% |
| 2014 | Not tested | — | — |
| 2015 | Not tested | — | — |
| 2016 | Not tested | — | — |
| 2017 | Not tested | — | — |
| 2018 | Not tested | — | — |
| 2019 | Not tested | — | — |
| 2020 | 677 | 7 | 1.0% |
| 2021 | 706 | 8 | 1.1% |
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: 1997, 1998, 1999, 2004, 2005, 2006, 2011, 2012, 2013, 2020, 2021.