Rules about wastewater treatment in Norway is set by The Norwegian Environment Agency or the county governor. Both of them prepares demands for contamination in wastewater which is released to the nature after use.
Mivanor has several wastewater treatment solutions which can help to comply the levels of contamination. There exist several demands for wastewater treatment and they varies across industrie and situations.
Companies and indutries which has a separate permission from The Norwegian Environment Agency or the county governor need to be aligned with the municipality's requirements.
The regulations of limitations of pollution can be found here