Public access to environmental information is a recurring theme in many international environmental law regimes. Nigeria has ratified and committed itself to many such regimes over the years. And yet, until recently, it had a culture of secrecy in (environmental) governance that was sustained by legislation, with the attendant harm to the environment and public well-being. This changed in 2011, with the enactment of the Nigerian Freedom of Information (FOI) Act. This article uniquely assesses the value of the Nigerian FOI Act in relation to what may largely be considered international best practice principles on public access to environmental information as generally reflected in the UNECE’s Aarhus Convention. Even though Nigeria is not a party to it, it is argued that the Convention is still legally and politically relevant to Nigeria. This comparative analysis will reveal areas where the Nigerian FOI Act aligns with, probably goes beyond, but also falls short of best practice, thus leading to some suggestions for improvement in the Act in order to ensure better public access to environmental information.