Bay of Plenty farmers are doing better at complying with dairy effluent rules, the Regional Council says.
A survey of almost 300 dairy farms last year showed improved compliance levels compared with the previous year, and the council found no breaches serious enough to justify a prosecution.
Three quarters were meeting all the rules, and fewer than 10 percent breached conditions related to environmental effects or best practice.
The council issued seven abatement notices or formal instructions to take action, and 11 infringement notices or fines.
Pollution Prevention Team Leader Steve Pickles said the top three issues were poorly managed ponds, poorly managed effluent irrigation and poorly managed stormwater diversion systems.
The council had prosecuted only one dairy farm in the past three seasons of monitoring.