Water Security
Water is a very important resource to the business operation of TPI Polene Power as it is one of the main raw materials used in the production process. The Company realizes and places importance to the use of water resources from natural and surface water sources, including wastewater from the production process for maximum efficiency in order not to affect the overall water management of the Pasak River Basin Irrigation Project and those who consume water from the Pasak River.
Operational Targets
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Short-term Targets within 5 years |
Long-term Targets for more than 5 years |
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· Wastewater from the electricity production process can be filtered and reused for a minimum of 31,000 cubic meters per month. · The average water use per unit of electricity production is reduced to - no more than 4.5 liters/kWh in 2022 - no more than 4 liters/kWh in 2023 - no more than 3.60 liters/kWh in 2024 - no more than 3.30 liters/kWh in 2025 - no more than 3.00 liters/kWh in 2026 |
· Recycle wastewater from the power generation process for reuse at least 50,000 cubic meters/month within 2030. · The average water use per unit of electricity production is reduced to no more than 3 liters/kWh in 2030 |
Note: The Company has designated 2022 as the base year for its water consumption reduction targets.
Management Guidelines
TPI Polene Group has shown a clear intention to manage internal water to achieve the most cost-effective use of water within the community. The Company's water source will be procured by Plc. TPI Polene from two main sources of raw water, namely the Pasak River and water from surface water reservoirs, including wastewater within the plants. The details(GRI 303-1) are as follows:
- Water from the Pa Sak River will be pumped up to the cement plant's water treatment plant, where a water supply system to be sent for use in production processes both cement plants and power plants.
- Water from surface water reservoirs and wastewater within the plants consists of:
2.1 A reservoir of 180,000 cubic meters for rainwater that falls on the plant area.
2.2 A reservoir of 1,5000,000 cubic meters for rainwater that falls in the mine area and nearby areas.
2.3 A reservoir of 1,000,000 cubic meters by TPI Polene Public Company Limited to be a reserve water source for the Company as well as to prevent impacts on the water consumption of people in nearby areas. Water from the surface water reservoirs will be pumped together with water from the Pa Sak River to improve its quality before being sent to cement plants and power plants and is also a reserve water storage reservoir for use in the dry season in cases where the amount of water from the Pa Sak River is insufficient for industrial consumption.
In addition, TPI Polene Group also uses groundwater for producing drinking water for sale and drinking within the plants. The approach that TPI Polene Group has followed is to reduce the use of water resources from natural rivers by building surface water reservoirs for use in cement plants and power plants to prevent impacts on the water consumption of people in nearby areas. Therefore, the Company undertakes the following actions:
- Water pumping from the Pa Sak River is controlled by the Saraburi Provincial Irrigation Project Office. The Office will issue a license for the Company to pump water not exceeding 1,000,000 cubic meters per month. The Company is required to prepare a monthly report summarizing the amount of water pumped from the Pa Sak River to the Saraburi Provincial Irrigation Project Office. In addition, the Office will arrange for staff to check the meters to check the volume of water pumped from the Company's Pa Sak River on a monthly basis. (GRI 303-1)
- Since the Pa Sak River is used by many sectors such as agriculture, industry, commerce, and households, water use must be controlled and allocated. The Saraburi Irrigation Project Office will control and allocate water use so that all sectors receive proper and fair water allocation. (GRI 303-1)
- The Company does not discharge wastewater outside the plant. Wastewater is collected in wastewater storage ponds for reuse within the facility. Nevertheless, the Company conducts monthly wastewater quality analysis. The treated water is reused for purposes such as watering plants and other internal reuse activities. Over the past three years, the Company’s wastewater discharge has been zero. The wastewater quality has consistently remained within regulatory standards, and no cases of non-compliance with environmental requirements have been identified. (GRI 303-2)
In addition, TPI Polene Group has established a quantitative target to reduce water consumption in the production process by no less than 12% by 2026 compared with the base year of 2022. This voluntary target exceeds legal requirements. The Company has improved water use efficiency in accordance with the 3Rs principle (Reduce, Reuse, Recycle). Based on the 2025 operational results, the Company successfully reduced water consumption in the production process by 12.97%. When calculated per unit of electricity generation, water consumption decreased to 1 liter/kWh (2022 = 4 liters/kWh; 2025 = 3 liters/kWh), representing a 25% reduction. This achievement was accomplished through reducing water consumption in the production process (Reduce), reusing water (Reuse), and recycling wastewater from office operations through treatment systems for reuse (Recycle). The Company also continuously monitors groundwater wells, wastewater ponds, and treated water through its water treatment system, ensuring that water is reused within the facility, such as for watering plants and reuse, etc. In addition, the quality of raw water, wastewater, and treated water is continuously monitored to ensure that 100% of the water can be reused within the factory (such as using treated water for watering plants and other activities within the factory), with no discharge outside the factory over the past three years (the wastewater discharge volume has been zero for the past three years, therefore there has been no wastewater discharge destination at all).
Performance Results
In 2025, the Company’s total water consumption amounted to 7,892,421 cubic meters, consisting of 7,511,869 cubic meters of tap water and 380,552 cubic meters of treated water from the power generation process reused within the operations. The Company was able to reduce tap water consumption by 409,503 cubic meters compared with 2024. In addition, 380,552 cubic meters of wastewater from the power generation process were reused. This reduction was achieved as the Company increased the number of circulation cycles in the cooling water system to reduce raw water intake into the production process, by increasing the cycles from 2.5 cycles to 6 cycles. As a result, the overall water consumption decreased by 790,055 cubic meters per year.
This treatment and reuse are carried out through an RO water quality treatment system, resulting in an average reduction of 31,720.67 cubic meters of water usage per month, which aligns with the target of reusing no less than 30,000 cubic meters of wastewater per month.
In addition, the rate of water reuse in the electricity generation process increased to 4.82% of total water consumption in 2025, rising from 4.59% in 2024. The tap water consumption per unit of electricity generation was 3.23 liters/kWh, decreasing from 3.64 liters/kWh in 2024. In 2025, the Company recorded no incidents of non-compliance with legal and permit requirements related to water quality or water consumption (Non-compliance = 0 cases). The Company conducted regular monitoring of wastewater quality and water consumption in accordance with legal requirements, and no violations of any standards were identified throughout the reporting year.
Costs and Expenses Related to Water Resource Risk Management in 2025
In 2025, TPI Polene Power Public Company Limited incurred total costs related to water-related risks of approximately Baht 60 million. These costs include expenses for the installation and maintenance of rainwater storage ponds with a total capacity of 2.68 million cubic meters, pumping reserve water during the dry season, and additional costs for treating raw water to ensure its suitability for use in the electricity generation process. These expenditures are part of the Company’s water risk management efforts aimed at reducing potential impacts on electricity generation and surrounding communities.
Investment in Research and Development to Mitigate Water Resource Risks in 2025
In 2025, the Company invested Baht 6.30 million in research and development to mitigate water-related risks. The investment focused on the development of a Zero Liquid Discharge (ZLD) system for wastewater reuse, technologies to improve cooling water quality in order to increase cooling tower cycles from 2 cycles to 6 cycles, and the enhancement of rainwater storage pond efficiency to ensure sufficient water supply for power plant operations during the dry season. These initiatives help reduce water-related risks and decrease reliance on natural water sources in the long term.
- Guidelines for Measuring Effectiveness Against Established Targets
TPI Polene Power Public Company Limited has established objectives and Targets for water management. To ensure that operations align with these objectives and Targets within the ISO 14001 management system, the Company has formed a working group responsible for overseeing operations related to ISO 9001, ISO 14001, ISO 45001, ISO 17025, and ISO 50001 management systems on a monthly basis. This group evaluates operational trends monthly to facilitate improvements or address issues that arise during operations, aiming to achieve the established Targets.
Physical Risk Assessment (Physical Risk Prioritization) from Climate Change
The Company conducted a physical risk assessment covering its power plants and MSW fuel production facilities located in Thap Kwang Sub-district, Kaeng Khoi District, Saraburi Province, Thailand. The assessment utilized Think Hazard to evaluate the Baseline Hazard Level (BSL) and CCKP (Climate Change Knowledge Portal by the World Bank) to analyze projected changes under RCP 2.6 and RCP 8.5 scenarios for 2030 and 2050
See more details in the Sustainability Report 2025