Nepomuceno, Lucky Rosen, Ganzon, Leo Theodore, Rapas, Aileene, (February 1998)
Philippine Science High School Western Visayas Campus – Department of Science and Technology (DOST-PSHS WVC), Brgy. Bito-on, Jaro, Iloilo City 5000, Philippines
ABSTRACT
The water quality of Iloilo Port was analyzed in terms of the concentration level of the concentration level of qualitative determinate: coliform bacteria, dissolved oxygen, sediments (dissolved and settleable), water pH, water temperature , salinity, and conductivity. These are all important factors in determining whether a body of water is polluted or not.
Four sampling stations were chosen in the site. Each of the determinants were read thrice each testing and then averaged. The testings were conducted on: July 26, October 4, November 7, and November 15. Temperature, salinity, conductivity, pH, and dissolved oxygen were determined on site. Dissolved and settleable sediments and coliform concentration were determined in the laboratory.
Results showed that the waters of Iloilo Harbor fall under the Department of Environment and Natural Resources Class SC waters or Recreational Waters Class II. This is a water classification suited for boating, and commercial and sustenance fishing. Although there were changes in the values of the different parameters with regards to the different testing sites, there are minimal and showed no significant variation in the water quality of the different areas in the harbor. The temperature range varied from 30.13 to 30.58 Celsius. The dissolved oxygen had a variation of 6.51 to 8.77 ppm. The pH varied from 6.36 to 6.89. The conductivity variation was from 51.22 to 51.39 ohms. Water salinity had a variation of 32.70 to 32.74 ppt. Coliform concentration ranged from 208.81 to 2154.82 MPN/100mL. The variation of dissolved solids concentration ranged from 26.65 to 30.92 g/L. The amount of settleable solids varied from 0.002 to 0.003 g/L.