That approach has had a positive response from farmers but there have been criticisms from some that announced visits could enable farmers to cover up bad practices.
Following that criticism, staff gained council approval late last year to do 100 unannounced visits around the region over several months to compare compliance rates of farms receiving announced inspections and those getting unannounced visits.
"We'll now be getting on with those unannounced checks and hope to be in a position to report back to the council by the end of the calendar year on what we find," said Mrs Botherway.
"In the meantime we really appreciate the very positive work many farmers have carried out, in consultation with council staff, to lift their management of effluent and protect our environment. It's this sort of co-operation that we believe can make a significant difference for our waterways and farmers who've invested in boosting their environmental performance deserve much credit."