How long before horses can drink from treated water?

Horses can typically drink from treated water shortly after it has been treated, as long as the treatment method used is safe for livestock. For example, if the water has been chlorinated, it's generally recommended to wait at least 30 minutes to 1 hour before allowing horses to drink, ensuring that the chlorine levels have dissipated to safe levels. Always consult specific guidelines for the treatment used, as some methods may require longer waiting periods.