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In the recently completed Groundwater Resource and Vulnerability Assessment in Matag-ob, Leyte by the Mines and Geosciences Bureau Regional Office No. VIII, field findings confirmed that the municipality has good water quality and suitable for human consumption based on their low total dissolved solids (TDS) with readings of less than (<500 ppm). Said findings was based on the physical quality gathered from random wells and/or springs from mostly residential, farmlands and some coastal areas. Groundwater Resources Assessment Team conducted a Geo-resistivity survey and well and spring inventory in the said Municipality to determine the groundwater availability of the area. The physical properties gathered were pH, total dissolved solids (TDS), electrical conductivity (EC), and temperature.

There were forty-nine (49) sources assessed and tested for physical quality of water, to wit: twenty-five (25) springs, five (5) shallow wells, and twenty-one (21) dug wells. The team also randomly selected and collected eighteen (18) water samples for chemical analysis (Laboratory Test). The standard for recommended drinking water as per DENR Admin. Order No. 26-A, Series 1994 and NSDW is shown in the table below.

National Drinking Water Standards (DENR Admin. Order No. 26-A, Series 1994)


NSDW (mg/L)


No Objectional Taste


No Objectional Odor


2 – 10 Color Units


6.5 – 8.5

Total Dissolved Solids (TDS)

500 mg/L



Electrical Conductivity (EC)


The team has strategically laid out four (4) Vertical Electrical Soundings (VES) points within the Municipality of Matag-ob. The data gathered using the geo-resistivity instrument will be used in the formulation of groundwater maps after proper data processing and in determining subsurface layers, depth and thickness of aquifers potential for groundwater extraction.

The Groundwater Resource Team of MGB-08 is comprised of Mariel B. Tuonan, Senior Geologist, Ennah Marie D. Ambe, Geologist II and Loren T. Kuizon, Geologist, and Emiliano P. Alonzo, Jr., Geologic Aide.