The objective of this study was to document trends in public participation within environmental impact assessment (EIA) in Kenya, using a Consultation and Public Participation Index (CPPI) developed for the analysis of EIA Study Reports submitted to the Environment Authority between 2002 and 2010. Results indicated that public participation remained relatively low, with the highest score of 1.65 in 2010, out of a possible score of 5. Scores for individual dimensions within the index fluctuated during the study period, with participation methods and type of participants scoring the highest, following increased emphasis by the Environment Authority on the conducting and reporting of public participation. This was followed by venue, notification and language used, in that order, which were often not reported, and, when reported, choices per dimension were limited. This is the first time this index has been used, yet it serves as a good starting point to evaluate public participation within EIA.