What’s Detected?

Food × analyte

DDE p,p' on lettuce

1999–2017 · 10 tested years

5,933samples tested
for this analyte
240samples with
a detection
4.0%of analyte-tested samples

Testing detected DDE p,p' in 240 of 5,933 lettuce samples actually tested for this analyte. This percentage uses analyte-tested samples, not all 6,655 samples of this food.

Year-by-year results

Actual tested and detected sample counts.

0%25%50%75%100%1999: 2.7%, 5 of 185 tested samples2000: 1.2%, 9 of 740 tested samples2001: 6.0%, 33 of 554 tested samples2004: 11.3%, 84 of 743 tested samples2005: 14.7%, 109 of 743 tested samples2010: 0.0%, 0 of 743 tested samples2011: 0.0%, 0 of 744 tested samples2015: 0.0%, 0 of 378 tested samples2016: 0.0%, 0 of 756 tested samples2017: 0.0%, 0 of 347 tested samples199920082017

10 tested years between 1999 and 2017. Gaps mean no validated tests in this release.

Read the yearly counts
Percentages use the samples actually tested in each year.
YearTestedDetectedRate
199918552.7%
200074091.2%
2001554336.0%
2002Not tested——
2003Not tested——
20047438411.3%
200574310914.7%
2006Not tested——
2007Not tested——
2008Not tested——
2009Not tested——
201074300.0%
201174400.0%
2012Not tested——
2013Not tested——
2014Not tested——
201537800.0%
201675600.0%
201734700.0%
Testing panels and detection limits change. These observations do not establish a causal trend.
All results for Lettuce →DDE p,p' across foods →

About these results

Source: USDA Pesticide Data Program. Included annual releases: 1999, 2000, 2001, 2004, 2005, 2010, 2011, 2015, 2016, 2017.

How we count tests, detections and missing years →

Other analytes on this food

ImidaclopridDCPADimethomorphPermethrin cis