Here's a 2017 study from Egypt about the frequency of parasite cysts on fresh produce[1]. Here's another about salmonella generally in North Africa[2]. Both irrigation and washing of produce use water that may not be safe to drink. This isn't some anecdotal issue I'm bringing up.

[1] https://aeji.journals.ekb.eg/article_17804.html

[2] https://www.frontiersin.org/articles/10.3389/fmicb.2017.0156...