Physicochemical-assessment of the water quality of Bulacao River, Cebu, Philippines

Authors / Editors: F.F. Maglangit, E.O. Bensig Galapate, Ritchelita P.


This study was carried out to assess and provide baseline data on the water quality of Buhisan River, Cebu, Philippines. Water samples were taken in the upstream, midstream and downstream sites of Buhisan River once a month from November 2011 to April 2012. The parameters measured on-site were temperature, pH and total dissolved solids (TDS). Laboratory analyses of total suspended solids (TSS), dissolved oxygen (DO), biochemical oxygen demand (BOD5), nitrates and total phosphorus were carried out according to APHA methods. Results of the study showed that mean midstream and downstream DO and BOD levels did not comply with the standard for Class D surface waters set by the Department of Environmental and Natural Resources (DENR). All measured parameters except for temperature vary significantly across location (p<0.05). The levels of BOD and DO in the midstream and downstream sites exceeded the DENR limit which is suggestive of organic pollutants from domestic sources and urban runoffs from surrounding areas. The water quality of Buhisan River must be regularly monitored to appropriate mitigating measures for the protection and preservation of this freshwater resource.

Published by: Journal of Biodiversity and Environmental Sciences 5 (2) , 2014 | Page Nos: 518-525
Type of Publication: Journal Article