Trend - Buzz - List WHO Ranks Onitsha the Most Polluted City in the World By Philip Posted on May 13, 2016 According to this database released by the World Health Organization today, Onitsha, Anambra state is ranked the most polluted city in the world. Aba and Umuahia also made the list. Related Items:Aba, Anambra State, nigeria, Onitsha, polluted cities Recommended for you Buhari’s Return Date Shrouded In Secrecy As First Lady Returns To United Kingdom!! PHOTOS: EFCC Uncovers New High-rise Building and Properties Worth Millions of Naira Traced to Diezani Obasanjo And Others Plotting To Find A Replacement For President Buhari’s Successor Place your ad here Loading... Click to comment Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Notify me of follow-up comments by email. Notify me of new posts by email.