There are many good reasons for supporting organic agriculture (and having an organic garden if you can) but this one strikes home powerfully.  The industry-friendly EPA allows “biosolids”, a euphemism for human sewage, to be spread as fertilizer on US farm fields.  Sewage is contaminated extensively with “forever chemicals”, toxins that accumulate and persist in the sewage, in the crops, and in people who eat them.  Organic standards do not allow sewage to be spread on organically certified farms so organically grown food is safe from sewage.  If you buy locally, be sure to ask growers what they are using as fertilizer and whether they use “biosolids”.