PT. Krakatau Blue Water is a joint venture between PT. Krakatau Tirta Industri with Blue O&M Co. Ltd. which operate and maintain (O&M) Final Wastewater Treatment and Reusing System facilities of PT. Krakatau Posco in Cilegon since 2013. The capacity of wastewater treatment is 17,000 m3/day and reusing system capacity is 7,000 m3/day.