Large-scale operations (1000 animal units or
more) are required to apply for a WPDES permit before reaching 1000
animal units, and to reapply every five years. WPDES Permits focus
on pollution prevention through sound planning,. construction and
manure management. Smaller-scale operations (less than 1000 animal
units) could receive a Notice of Discharge (NOD). Under the NOD program,
technical and financial assistance may be available to help these
operators correct discharge problems.