Septage plant in Meycauayan

Published in Philippine Graphic (2013)

A basic lack [editorial]

Published in Philippine Star (2010)

Poor sewage treatment, sanitation costs P 67B

by Calumpita, Ronnie
Published in Manila Times (2006)

Biological waste water treatment tech gains ground in local market

by Aguiba, Melody M.
Published in Manila Bulletin (2006)

Bioremediation. IN Educators speak [column] hope of environment

by Raymundo, Asuncion K.
Published in Manila Bulletin (2006)

Manila water launches treatment plant in time

by Calumpita, Ronnie E.
Published in Manila Times (2004)

Manila Water revs up P7B wastewater gameplain; opens UP sewage plant

Published in Philippine Daily Inquirer (2004)

No money to put up water-treatment plant

by Calumpita, Ronnie E.
Published in Manila Times (2004)

New technology for organic wastewater

by Yew, N'Teng
Published in Philippine Daily Inquirer (2001)

A Filipino pioneer in water treatment

by Frialde, Daniel
Published in Manila Bulletin (1995)