The affected wards are in Buxar, Bhojpur, Patna, Saran, Vaishali, Lakhisarai, Darbhanga, Samastipur, Begusarai, Khagara, Munger, Katihar, Bhagalpur, Sitamarhi, Kaimur, Rohtas, Aurangabad, Gaya, Nalanda, Nawada, Sheikhpura, Jamui, Banka, Supaul, Madhepura, Saharsa, Araria and Kishanganj districts.