Law No. 6.837 providing for the conduct of environmental audits.

This Law, consisting of 12 articles, establishes the procedures to conduct environmental audits within the State of Pará. These audits aim to assess and study environmental activities to determine: the actual or potential levels of pollution or environmental degradation caused by human activities; conditions of operation and maintenance of pollution control equipment and systems; measures to be taken to rehabilitate the environment and protect human life and health; training of responsible people for the operation and maintenance of systems, routines, facilities and equipment to protect the environment and workers' health. State government agencies in charge of implementing environmental protection policies may determine periodic or occasional audits, establishing specific guidelines and timelines. Offences and penalties for illegal activities are specified in the text.
Annual environmental audits are mandatory for companies or activities with high potential for pollution, including: I - oil terminals and their derivatives; II - port facilities; III - installations for storing toxic and dangerous substances; IV - facilities for processing and final disposal of toxic or hazardous waste; V - units for electric energy generation from thermal and radioactive sources; VI - treatment facilities and final disposal systems for domestic sewage; VII - petrochemical and steel industries; VIII - chemical and metallurgical industries.