Salinity grips nearly 80 percent villages under Koira upazila in the district, causing persistent crisis of safe drinking water and extensive damage to arable lands, especially those producing paddy and vegetables.
Due to high salinity following the onslaught of cyclone Aila on May 25 in 2009, paddy yield per bigha of land has come down to 8-10 maunds while it was 20-22 maunds earlier in Koira