Oil, grease decreasing in Boracay but they exceed standards–DENR
Nestor P. Burgos Jr.
@inquirerdotnet
Inquirer Visayas
5:24 AM | Monday, February 9th, 2015
BORACAY ISLAND, Philippines—The quality of Boracay Island’s coastal waters has generally improved in recent years, but an area where drainage is discharged has registered a high level of coliform bacteria contamination, according to the Department of Environment and Natural Resources (DENR).
The DENR Environmental Management Bureau (EMB) in Western Visayas reported that the island’s coastal waters were generally within standards based on results of tests conducted bimonthly, from January to October last year.
Samples were taken from 15 stations in the bathing area along the island’s white beach, including eight samples taken 100 meters from the shoreline along the western side of the 1,032-hectare island.
Two other samples were taken at the Cagban jetty port and the drainage outfall in Sitio (settlement) Bulabog along the eastern coast of the island.
The samples were tested for dissolved oxygen, acidity, oil and grease, total coliform and fecal coliform, which are basic measures of water quality.
The DENR EMB Western Visayas presented the results of the tests in a meeting with representatives of the local government, business and other private groups and community leaders in Boracay last Friday.
The results showed that the coastal waters were generally within acceptable levels, except for oil and grease, which registered an average of 4.4 milligrams/liter, higher than the standard of 2 mg/L for waters designated for swimming and 3 mg/L for waters designated for nonswimming activities.
Possible causes
Samson Guillergan, chief of the EMB environmental monitoring and enforcement division, said the oil and grease levels were decreasing compared to previous years.
“But they still exceed standards,” he told the Inquirer.
Among the possible causes were discharge from motorboats and ships and oil from households.
The docking of passenger boats has been regulated in the past years with regular trips limited at the Cagban jetty port.
Boats were limited to picking up passengers for boating and water activities along the white beach.
But cargo and passenger ships regularly docked at the Caticlan jetty port in the Aklan mainland across Boracay.
Coliform bacteria concentration was also within normal range except for the samples taken at Tulubhan and Bulabog stations.
The annual total coliform, which included bacteria from fecal matter and decayed plants, reached 1,045 most probable number (MPN) per 100 milliliters sample from the Tulubhan sampling station and 2,466 MPN/100 ml from the Bulabog sampling station.
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