The probe in Lakewood has resulted in the arrest of or charges against 26 people since the initial arrests last week.
Large parts of Florida are suffering from severe drought, and hurricane season threatens to make things worse.
"For the ways my work was used to divide people rather than bring us together, I ask forgiveness and I will work to do better," Zuckerberg wrote in a post on Facebook.
Four Lakewood couples were arrested two days earlier as part of the same probe.
There have been no confirmed reports of adverse reactions due to consumption of the at-risk products so far.
The statement follows the arrests of at least seven couples on charges of illegally obtaining government benefits.
The organization reports that it has about 25,000 dues-paying members nationwide, up from 8,000 in recent years.
Hillel International's guidelines prohibit partnerships with groups that delegitimize Israel or support the BDS movement.
A Facebook official responding to the ProPublica report said it "was a failure in our enforcement."
A letter objects to a decision to prevent the deputy director of the pro-BDS Jewish Voice for Peace from boarding an Israel-bound plane.