Coliform Load, Physico-chemical Parameters and Anthropogenic Activities Along Ylang-Ylang River, Cavite

Abstract

INTRODUCTION

Ylang-Ylang River is one of the major rivers in Cavite which traverses from Silang to San Jose, Dasmariñas converging with San Juan at Bacao, Gen.Trias. This sporadic river is a floodway and a point of wastewater discharges from domestic, industrial and commercial establishments.

METHODS

Three sampling stations were chosen and a total of 295 households was randomly selected to answer the survey. The physico-chemical parameters were measured in situ at the midpoint and the peripheral sides of the river. Multiple Tube Fermentation Technique (MTFT) was employed and results were analyzed following the Standard Method for the Examination of Water and Wastewater.

RESULTS

Results showed that the three stations along the river system were contaminated with coliform levels that exceeded the standard limit set for Class C water. Temperature, salinity, total dissolved solid, conductivity and chloride showed positive correlation to coliform load while pH and dissolved oxygen showed negative correlation. Anthropogenic activities that contributed to coliform contamination ofYlang-YalngRiver were the use of organic fertilizer, improper disposal of waste and manure and direct defecation of humans.

DISCUSSIONS

Overall assessment revealed that water quality of the river was deteriorating and was exacerbated with varied anthropogenic activities of the residents along the river system., Due to these activities, there is a need for proper management and protection of the river.