The bulk of acid deposition happens when fossil fuels are burned and pollutants such as sulfur dioxide and nitrogen oxide are released into the atmosphere and fall to the ground in wet or dry forms. Aside from contributing to air pollution, these make soils, lakes and other water bodies become acidic. In order to address these concerns, the Acid Deposition Monitoring Network in East Asia (EANET) was organized in 1998 as an intergovernmental initiative.

The rules of procedure for the network were adopted at the Third Session of the Intergovernmental Meeting (IG3) held in November 2001 in Chiang Mai, Thailand. Thirteen countries participate in EANET namely, Cambodia, China, Indonesia, Japan, Lao PDR, Malaysia, Mongolia, Myanmar, Philippines, Republic of Korea, Russia, Thailand, and Vietnam. UN Environment acts as the EANET Secretariat while the Asia Center for Air Pollution Research (ACAP) in Niigata, Japan serves as the Network Center.

The objectives of the EANET are to:
1. Create a common understanding of the state of the acid deposition problems in East Asia;
2. Provide useful inputs for decision-making at the local, national and regional levels aimed at preventing or reducing adverse impacts on the environment caused by acid deposition; and
3. Contribute to cooperation on the issues related to acid deposition among participating countries.

EANET’s activities include (1) acid deposition monitoring, evaluation and quality control; (2) technical support, research and capacity building; (3) awareness raising and; (4) cooperation and information exchange.

Focal Office: Environmental Management Bureau (EMB)
Date launched 1998
Undersecretary for Policy, Planning and International Affairs, DENR Tel. No. (632) 928 1186

Director, DENR-EMB
Tel. No. (632) 928 3725, 927 1517EANET Scientific Advisory Committee Member

Chief, Air Quality Management Section, Environmental Quality Division, DENR- EMB
Tel. No. (632) 928 4430QA/QC Manager

Professor, University of the Philippines Los Banos, LagunaENGR.

Supervising Science Research Specialist, Environmental Research and Laboratory Services Division, DENR-EMB
Tel. No. (632) 426 4332 to 39

Commitments: Activities under the EANET are all voluntary in nature. The Philippines, through EMB, participates in regular EANET activities such as:
1. Inter-Laboratory Comparison Projects on Filter pack for Dry Deposition (DD), Wet Deposition (WD), Inland Aquatic Environment (IAE), and Soil;
2. Submission of annual monitoring data on DD, WD, IAE, Catchment-Scale (CS), and Soil and Vegetation (S&V) to the ACAP;
3. Preparation of National Periodic Assessment Report;
4. Participation in various EANET meetings;
5. Participation in technical support, research and capacity building activities;
6. Technical missions by the ACAP; and
7. Public Awareness Workshops.
Policy Issuances: DENR Administrative Order 2000-81 Implementing Rules and Regulations for RA 8749 (Philippine Clean Air Act of 1999)
Sources / Relevant Links:
Status/Updates: The EMB currently undertakes the following monitoring activities in the established EANET sites covering urban, rural and remote areas:
– Deposition (WD and DD) monitoring done weekly at the Metro Manila (MM) site located at the Manila Observatory in Ateneo de Manila University; and at Mt. Sto. Tomas (MST) site located in Mt. Sto. Tomas in Tuba, Benguet;
– IAE monitoring conducted quarterly at Pandin Lake in San Pablo, Laguna; and at Lake Ambulalakao in Kabayan, Benguet;
– CS monthly monitoring in La Mesa Watershed, Quezon City;
– S&V monitoring every three years in Mt. Makiling Forest Reserve in UPLB; Quezon-Laguna Land Grant in Siniloan, Quezon; La Mesa Watershed in Quezon City; and Boneco Long Term Ecological Research Station in Itogon, Benguet;
– Continuous Particulate Matter (PM2.5) concentration monitoring at the MM site started in November 2018.
Laboratories of EMB Central Office and EMB-CAR participated in the Annual Inter-laboratory Comparison Projects of ACAP. These projects included analyses of synthetic dry, wet, lakewater and soil samples to check the proficiency of both laboratories to analyze EANET samples.
The Third Periodic Report on the State of Acid Deposition in East Asia dated December 2016 contains a national assessment from the Philippines for the period 2010-2014.
The wet-only sampler (wet deposition) and filter pack sampler (dry deposition) were re-installed and weekly monitoring was resumed at the Metro Manila site located at the Manila Observatory Grounds, Ateneo de Manila University on 27 February 2019. The samplers in the monitoring site located at the PAGASA AGROMET-University of the Philippines, Los Banos will be re-installed once the procurement of the samplers and required spare parts are completed.
The Philippines participated in the annual ACAP Inter-laboratory Comparison Project (Filter Pack, Wet Deposition, Inland Aquatic Environment and Soil) from 2016 to 2018.


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