The inspections that resulted in significant non-compliance grades uncovered effluent discharges and silage leachate discharges that resulted in ponding, combined farm landfills and offal pits and one case where inappropriate effluent pond infrastructure was being used, his report to the committee said.
Staff followed up in each of these cases and appropriate action was taken, he said.
Infringement notices, abatement notices and warnings were issued.
Information Saunders presented to the committee on Friday showed last year 80 per cent of inspections resulted in grades of full compliance; this year only 61 per cent of inspections did.
The report also noted the council initiated a project with Environment Canterbury and Environment Southland staff to review compliance procedures, rules and monitoring for dairy effluent.
Staff completed audits in the three regions to get a better understanding of how neighbouring councils monitored dairy farms.
The project would increase consistency in compliance efforts, Saunders said.