Take a look around the big veggie fields and fruit orchards here in the USA where the illegals are picking the crops.
Try to find adequate Porta-Pots with toilet paper and clean hand washing facilities with hot running water, soap, towels, etc.
When they are paid by the bushel basket how many will take the time to trudge a half mile to a dirty port-pot and back instead of ducking down right where they are?
The old caution concerning eating fresh veggies or drinking the water when South of the Border.
It's been brought up here.
My brother was a agricultural missionary in a S. American country some years ago.
One of the first things he did was get milk pails w/ a hood covering about half the opening. Designed to help prevent the cows from peeing in the milk. Strange tasting milk. Really.