Department of Environment and Natural Resources

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    Date: 2022-09-22 04:57:12.492097


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    Date: 2022-09-22 16:57:33.313388

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Water Hyacinth and Pasig River Quality Data

Requested from DENR by J. Caberte at 04:57 AM on Sep 22, 2022.
Purpose: Architectural Research
Date of Coverage: 01/01/2019 - 09/22/2022
Tracking no: #DENR-973243999406

Caberte 04:57 AM, Sep 22, 2022

Good day!

I would only like to ask if there exists a new/updated file of the previous 2019 PRRC Water Hyacinth Control Guidelines. I
In line with my architecture thesis, I'd also like to ask of any available data from the following:

1.) Seasonal/monthly volume of Water Hyacinth (during rainy and dry seasons)

2.) Needed/Required Water Hyacinth Harvester Boats to sufficiently control water Hyacinth

3.) Latest Waste/trash volume in Pasig River

4.) Source location of Water Hyacinth growth along Pasig River

Should my request be denied once again, please note that I am only asking for any avai

September 22, 2022

Dear JR,


Thank you for your request dated Sep 22, 2022 under Executive Order No. 2 (s. 2016) on Freedom of Information in the Executive Branch.

Your request

You asked for Water Hyacinth and Pasig River Quality Data.

Response to your request

While our aim is to provide information whenever possible, in this instance this Office does not have  the information you have requested. However, you may wish to contact the Pasig River Coordinating and Management Office at tel. nos. 8928-1169 or email at;

For further assistance you may review the FAQ section of the eFOI site:

Your right to request a review

If you are unhappy with this response to your FOI request, you may ask us to carry out an internal review of the response by writing to Sec. Maria Antonia Yulo Loyzaga, DENR Central Office, Visayas Avenue, Diliman, Quezon City, Tel. Nos. 8926-3011/ 8920-4301/8929-6626 loc. 2258 or email at Your review request should explain why you are dissatisfied with this response, and should be made within 15 calendar days from the date when you received this letter. We will complete the review and tell you the result within 30 calendar days from the date when we receive your review request.

If you are not satisfied with the result of the review, you then have the right to appeal to the Office of the President under Administrative Order No. 22 (s. 2011).

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Thank you.

JOCELYN B. DE LAYOLA                                                                                                                                          FOI Officer/OIC-Chief
Records Management Division
DENR Central Office
Tel. No. (02) 8926-8079
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