Farmers should be commended for their efforts to improve winter grazing practices, following aerial winter grazing inspections, Environment Southland says.
Chief executive Rob Phillips said the results showed "widespread examples of good practice" following concerns expressed last year.
"I'm impressed that farmers have taken up the advice given to mitigate the effects of winter grazing on the environment, despite the many challenges this year has presented.
"We know implementing good management practices, such as back fencing, buffer zones and being mindful of critical source areas, can make a big difference and we are seeing the results of that this year."
However, Phillips said it was important farmers did not become complacent.