Aerial checks of sediment disturbance and discharges to water from farming and forestry in Otago will start this week.
Otago Regional Council is carrying out its annual flights over the region to check on forestry, farming and other land-use activities.
The council has rules for sediment loss and stock access to waterways.
Regulatory general manager Richard Saunders said ensuring good practice for activities such as winter grazing was essential to protect the environment.
Changes to both regional rules and national environmental standards are expected soon.