The state government's shark drum line program will not be assesed by the Environmental Protection Authority, the agency has announced.

EPA chairman Paul Vogel told ABC Radio the EPA would not investigate the matter because the environmental impact was expected to be "negligible".

A fishing boat patrols near one of WA's controversial drumlines. Credit:Nine News Perth

After the matter was referred to the EPA it was opened up for a seven day public consultation period in February.

While the matter received record 23,000 responses in the public consultation period, Mr Vogel said the decision was not based on a "public opinion poll".