Anthropogenic activities and water quality of Estero de Magdalena/ Sandra Leslie M. Esguerra .--

Thesis (undergraduate)

College of Science .-- Bachelor of Science in Environmental Science .-- Technological University of the Philippines, 2019.

Includes bibliography:

The study aimed to determine the anthropogenic activities and water quality of
Estero de Magdalena. Composite sampling was used for the collection of water samples.
Anthropogenic activities were determined using survey coupled with interview to 90 key
informants, result revealed that improper disposal of garbage and excreting in the estero
are the leading anthropogenic activities along the area. Water quality is deteriorating due
to relatively high discharge of waste associated with dense population/informal settlers.
Water quality was determined by measuring the physical (temperature, pH and color),
chemical (ammonia as nitrogen, nitrate as nitrogen, surfactant, oil and grease, phosphate,
chloride, and BOD) and biological (fecal coliform) parameters. Experimental analysis
showed that temperature, color, pH, nitrate as nitrogen, and chloride are within the
allowable limit for Class C waters, but not ammonia as nitrogen, surfactant, oil and grease,
phosphate, BOD, and fecal coliform. The results of temperature, color, ammonia as
nitrogen, BOD, chloride, oil and grease, and fecal coliform are high as compared to the
2017 assessment of Pasig River Rehabilitation Commission. Statistical treatment revealed
that physico-chemical quality levels of three sites per month are significantly different
except for nitrate as nitrogen, ammonia as nitrogen, surfactant, pH (September and
October), color (June, July, and August), phosphate (August, September, and October),
and chloride (July). Contrariwise, water quality variations across five sampling periods are
not significant different except temperature, pH and phosphate.

Keywords: Anthropogenic Activities, Estero de Magdalena, Pasig River, Water Quality,
Temperature, pH, Color, BOD, Fecal Coliform, Ammonia as Nitrogen, Nitrate as Nitrogen,
Oil and Grease, Phosphate, Chloride, Surfactant