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Environmental Management

Environmental Management

Water Management

Recognizing shortage of water resources as a risk factor on a global scale, POSCO aims to reduce the risk of water shortages by recycling water and securing replacement water.
Pohang Works is implementing measures to improve its water management system, process and to find ways to increase water recycling with the goal of optimizing water management and increasing water recycling. To prepare for the medium to long-term increase in water demand, we are identifying and preventing potential water-related risks by improving the water purification system and diversifying sources of water supply. In 2014, we started retreatment of the treated water at Pohang City's sewage treatment plant using U/F and R/O methods and began using them as a new source of water for 80,000 tons daily, while decreasing that same volume of water from the 170 thousand tons per day water supply contract so that the local residents may have access to the dam water, responding to the risk of water shortage and contributing to alleviating the water shortage problem in the region. The low-pollution rainwater, discharge and effluents are treated appropriately to be reused for spraying roads and in the production process.

At Gwangyang Works we are conducting water conservation activities to prepare in advance for the rapid increase of water usage due to medium and long-term expansion of our facilities, increased production volume, and the future nationwide water shortage problem. We operate the seawater desalination facility to strictly maintain water quality that is necessary to improve product quality. We reduced water usage by using 6,000 tons of recycled water daily, and we continue activities to minimize discharge into the Gwangyang Bay in order to minimize impacting the area. Meanwhile, we are finding new usage for recycled water for each plant, such as washing water for the cokes plant's belt conveyor. We plan to continue our efforts in discovering new ways to use recycled water, based on forecasts for the increased water needs that are expected with plant expansions.
The final discharge concentration of major pollutants such as COD and T-N are maintained at 20%~80% of regulations, and each steelworks is enhancing water awareness of employees and executives by discovering and implementing water conservation ideas. We participated in the Water Management Project (2007~2011) conducted by World Steel Association and we continue to improve our water management program using the WBCSD (World Business Council for Sustainable Development) Water Tool, which is a water management guideline for the supply chain. We have been disclosing our water management information to our stakeholders since 2010 by participating in the CDP Water Disclosure program.

Water intake for Operations and Effluents Intensity
2012: Water usage - 3.58m3, Effluents - 1.69T-S / 2013: Water usage - 3.71m3, Effluents - 1.61T-S / 2014: Water usage - 3.671m3, Effluents - 1.62T-S
Final T-N Concentration in Effluents
2012: Discharge concentration - 15mg, Legal limit - 60ℓ / 2013: Discharge concentration - 15mg, Legal limit - 60ℓ / 2014: Discharge concentration - 15mg, Legal limit - 60ℓ
Final COD Concentration in Effluents
2012: Discharge concentration - 8mg, Legal limit -(Pohang) 70ℓ, Legal limit -(Gwangyang) 90ℓ / 2013: Discharge concentration - 9mg, Legal limit -(Pohang) 70ℓ, Legal limit -(Gwangyang) 90ℓ / 2014: Discharge concentration - 9mg, Legal limit -(Pohang) 70ℓ, Legal limit -(Gwangyang) 90ℓ