Assessment of ground water quality in Barangay Bigaa, Cabuyao, Laguna

Date

3-2004

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Nieva T. Librojo-Basilio

Abstract

ROXAS, PAULINE ANGELIC TUANQUI. College of Arts and Sciences, University of the Philippines Los Banos, March 2004. Assessment of Groundwater Quality in Barangay Bigaa, Cabuyao, Laguna.

Adviser: Dr. Nieva T. Librojo-Basilio

The evaluation of groundwater quality in Barangay Bigaa, Cabuyao, Laguna as a source of potable water was conducted from October 2003 to February 2004 on a bimonthly basis. Various parameters analyzed were pH, total dissolved solids (TDS), total hardness, chlorides, sulfates, nitrates, surfactant levels, major cations (sodium, potassium, calcium and magnesium), and coliform count.

The data obtained were statistically analyzed using Analysis of Variance (ANOVA) and Duncan's Multiple Range Test (DMRT) to determine the significance of the parameters with respect to date of collection, age, depth of well, and their interactions.

The data for pH ranged from 7.6 to 8.6, TDS gave values of 110 to 529 mg/L, and total hardness varied from 153.4-506.0 mg/L CaCO3. Chloride concentration was found to be within 8.25-60.07 mg/L, the amount of sulfate ranged from 4.32-48.47 mg./L, and nitrates had values of 0.15-8.18 mg/L. Surfactant levels fell within 0.001-0.294 mg/L as CFAS and 0.046-0.617 mg/L as LAS. Concentrations in mg/L of the major cations were 44.79-95.94 for sodium, 13.96-37.60 for potassium, 41.00-148.75 for calcium, and 12.00-33.75 for magnesium. Coli form count was observed to range from < 2 to 9 MPN/100mL.

Nearly all the parameters gave values within the maximum acceptable limit (MAL) set by the Department of Environment and Natural Resources for Class A drinking water and Philippine Water Quality Standards. Two sites exceeded the MAL for pH. registering at 8.6. For surfactant levels, one site gave a value 0.294 mg/L as CFAS while eight sites gave readings ranging front 0.293 to 0.617 mg/L as LAS, all above the MAL of 0.2 mg/L. The concentration of potassium for all sites were found to exceed the MAL of 12 mg/L. Coliform count for one site was known to have 9 MPN/100mL, above the MAL of < 2 MPN/100mL. All the other values for the rest of the parameters were within the MAL.

Comparison with the baseline data front the study conducted by Mallorca (1998) shows that the quality of groundwater in Barangay Bigaa is still suitable for drinking purposes provided the source is carefully chosen.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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