Four Counties Nairobi, Narok, Kiambu and Mombasa accounted for half of total own source revenue collection for the first half of the current financial year.
Data published by the Office of the Controller of Budget (OCOB) revealed that the four devolved units collected Sh9.9 billion in the six-month period as all the 47 devolved units raked in Sh19.9 billion cumulatively through their own sources.
