Water resource management

Water
Management

Management & Solutions
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Water Resources Statistics
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Certificates & Awards

Water management

In response to climate change and water resource risks, the company is committed to implementing water conservation and recycling strategies to improve water efficiency and optimize management. By implementing ISO 46001 and ISO 14046 standards for water management and footprint, combined with daily water monitoring, replacement of aging equipment, rainwater recycling, and process water reuse, we are gradually reducing water intensity and operational risks. We are also investigating and assessing water sources in high-risk areas and establishing a water resource risk identification and improvement mechanism to ensure operational stability and sustainable development.

Promoting programme and implementation results

♦ Established a drying centrifuge process water recovery system (HBF)

Centrifugal Drying High performance Bio-treatment and Filtration system (HBF)

Due to abnormal climate conditions and global water scarcity, Taiwan ranks 18th among the countries most at risk. CGPC Main Plant and CGPCP’s Linyuan Plant have installed biological treatment systems and COD adsorption systems to recover and reuse process wastewater. After being treated by newly established centrifuge water recycling equipment, the chemical oxygen demand (COD) and suspended solids (SS) in the water are reduced. The treated water is then replenished into the cooling water tower to reduce the consumption of tap water and the amount of wastewater discharged, thereby contributing to environmental protection efforts

In 2023, Phase 2 of the HBF project was launched, targeting a daily recovery of 100 tons.

Promotion Plan: Increase R2 water recovery rate by 0.4% annually (combined for all three plants).
2025 target: 81.0%.
2025 performance: 79.2%.

Benefits after improvement, 2025 amount of water conserved:

CGPC's Volume of water reused : 190.7 million cubic meters/year
TVCM's Volume of water reused : 269.1 million cubic meters/year
CGPCP's Volume of water reused : 368.8 million cubic meters/year
Three plants in total: 828.6 million liters/year

Note: Save about 331 Olympic-standard swimming pools of water.

♦ Implemention

Impact Risk

Water shortages caused by climate changes

Corresponding Action

A Conservation of processed water

➀ Start water conservation measures to increase the conductivity of the water replenished to the cooling water tower.
➁ Increase the concentration ratio of the cooling water tower and reduce the frequency of water replacement in the scrubber tower.
➂ Discharge the cooling water and recycle it as the water used in the scrubber tower.
B Conservation of water used in daily life

➀ Decompressed water supply
➁ Place water bottles and install water savers to squat toilets to achieve water conservation.
➂ Continue to advocate water conservation to employees.
➃ Improve on-site patrol inspections and send personnel to handle any water leaks immediately.
C Improve the recycling water treatment operation and the recycling rate and actively plan rainwater recycling.
D Purchased water and active the use of underground in the Toufen Main Plant.
E Continue to maintain contact with government agencies to obtain water information. 。
F CGPC Main Plant introduced ISO 46001 and ISO 14046 and continues to verify.
G Conduct monthly factory review meetings, exchange opinions with other factories from time to time, and keep
track of climate and reservoir information.
H One new 500-ton PE storage tank (20 pieces) and 1,500-ton tap water storage tank.

Improvement effect

(1) Install centrifuge dryer wastewater recovery systems (HBF) for CGPC (Toufen Main Plant) and CGPCP (Linyuan Plant).
(2) In 2023, the second phase of the HBF project was launched, It is expected that the daily recycling volume will increase by another 100 tons. In 2025, total recycled water reached 828.6 million liters, accounting for 0.03% of total water withdrawal.

Note：

CGPC’s recycled water includes HBF process recycled water, steam condensate, and reclaimed discharge water used in coal-fired boiler sedimentation tanks.

Water Resource Statistics

2025 Water Balance Chart (Unit: million liters)

Vinyl Chain Water resources statistics

Total R2 recycled rate of the three plants

2023

79.2%
2024

81.1%
2025

79.2%

Three plants in total

Total water intake

Total circulation volume

Circulated water volume

Total R2 recycled Volume

Total water intake, recycled and reused water of each plant in the past three years (Unit: million liters)

CGPC
(Main Plant)

Total water intake

Total circulating water volume

Circulated water volume

R2 Water Recycling Rate

TVCM
(Linyuan Plant)

Total water intake

Total circulating water volume

Circulated water volume

R2 Water Recycling Rate

CGPCP
(Linyuan Plant)

Total water intake

Total circulating water volume

Circulated water volume

R2 Water Recycling Rate

Note 1：

Starting from 2023, the recycled water ratio has been recalculated using the R2 water reuse rate method, with a target annual increase of 1%.

Note 2：

“Water recovery rate (excluding circulation within cooling water towers), referred to as the R2 water reuse rate”, is calculated in accordance with the “Regulations for Water Consumption Fee Collection.

Note 3：

Recycled water volume and circulation water volume are estimated figures. Circulation water volume = total circulation water volume - circulation within cooling water towers.

Note 4：

In 2024, due to the revised R2 water reuse rate formula by the Water Resources Agency, CGPC and CGPCP added circulation water volume as a statistical item, resulting in the revision of circulation water volumes for 2022 - 2023 and an adjustment of the 2024 target.

Note 5：

2025 Water Performance Overview Affected by force majeure external environmental factors, the industry experienced significant fluctuations in recent production volumes. Dynamic operational adjustments and an increased frequency of plant shutdowns and startups affected each facility, leading to water recycling rates and intensity metrics for 2025 falling short of expected targets. Nevertheless, despite the challenges of capacity load fluctuations, the Company continued to actively implement circular water management. The combined R2 plant-wide water recycling rate across the three plants remained at a high level of 79.2%, demonstrating the resilience of process water utilization and consistently fulfilling our original commitment to resource conservation.

Wastewater discharge

CGPC and subsidiaries adopt standards stricter than regulatory requirements for their treatment and discharge of wastewater. The destinations of each plant’s effluent are as follows:

CGPC
(Main Plant)

Jhonggang River

TVCM
(Linyuan Plant)

CGPCP
(Linyuan Plant)

Ocean discharge in Dalinpu (Note)

Note: The wastewater of each factory in Linyuan Industrial Park is treated and then discharged to the sewage treatment plant in Linyuan and then transported to the Kaohsiung Linhai Linyuan and Dafa Industrial Parks Combined Wastewater Treatment Plant of the Industrial Development Bureau, Ministry of Economic Affairs, before being discharged to the open sea of the industrial park and the water quality has to meet the discharge standards.

Wastewater discharged in the past 3 years (Unit: million liter)

2023
2024
2025

CGPC

TVCM

CGPCP

1. Effluent discharge from TVCM and CGPCP to the Linyuan Plant is significantly lower than their tap water consumption, indicating that a portion of the water has been recycled and reused, thereby reducing external wastewater discharge.

2. The volume of effluent discharge has been reduced because process wastewater is almost entirely recycled to serve as makeup water for cooling towers.

3. In response to an adjustment in the calculation methodology for total production volume, CGPC has retroactively revised its wastewater discharge intensity for 2023.

4. The increase in wastewater discharge at TVCM's Linyuan Plant in 2024 was primarily due to the inherently high conductivity of raw water in the Linyuan area. Particularly under high ambient temperatures, the conductivity exceeded cooling tower limits. Consequently, continuous makeup water feeding and blowdown (discharge) cycles were required to lower conductivity, leading to an increase in discharge volume to the wastewater treatment plant.

5. The increase in wastewater discharge at CGPCP's Linyuan Plant in 2024 was because when the wastewater treatment area at TVCM reached operating capacity, CGPCP discharged its own wastewater directly to the wastewater treatment plant.

6. The increase in wastewater discharge at both TVCM and CGPCP in 2025 was driven by production constraints, which led to a higher frequency of plant startups. This in turn increased process makeup water demand, resulting in a slight increase in wastewater discharge.

7. The increase in wastewater discharge intensity across the three plants in 2025 was due to the same factors described in Note 6.

Water Sharing

The firewater connection of TVCM Linyuan Plant and nearby APC are connected, as well as TTC、TSMC and Nantex can all support each other and share firewater resources. Besides dispatching water to support firefighting through water as a shared resource, this also strengthened the emergency response capability. Currently, the firewater of these five companies are connected in a firewater tank storage of about 10,900m³, the effective capacity of firewater storage tank at TVCM Linyuan Plant is 3,500m³.

Certified to ISO 46001 and ISO 14046

CGPC has introduced ISO 46001:2019 Water Resources Management System and ISO 14046:2014 Product Carbon Footprint to reduce and minimize water waste, improve and replace water-consuming equipment, and increase water recycling and reuse rates.

ISO 46001

ISO 14046

CGPC Water Recycling Rate
Verification Statement

CGPCP Water Recycling Rate
Verification Statement

CGPC achieved a Double B rating at the Management Level in the 2025 CDP Initiative

China General Plastics Corporation (CGPC) participated in the 2025 Carbon Disclosure Project (CDP) and achieved Management-level (B) ratings in both the Climate Change and Water Security categories, demonstrating the Company’s continuous commitment and effective implementation in environmental management systems and sustainable governance.

CDP is one of the world’s most influential environmental disclosure platforms. Its assessment framework evaluates companies’ management structures, risk response mechanisms, action plans, and performance outcomes related to climate and water issues. CDP ratings are widely referenced by international investors and business partners. The Double B management-level ratings recognize CGPC’s long-term efforts in energy efficiency, carbon reduction, water management, and the establishment of related management mechanisms.

Looking ahead, CGPC will continue to strengthen its environmental management practices, advance low-carbon transformation and water resource management initiatives, and enhance the quality of environmental information disclosure as a key foundation for promoting sustainable development.