In order to improve water consumption efficiency, Hsinpu Chemical Fiber Plant has been promoting wastewater classification, which separates wastewater and reuse purposes based on water quality, including production, onsite cleaning, domestic use and irrigation.

In 2019, Hsinpu Chemical Fiber Plant recycled water from the cogeneration plant and reused it to replace clean water as the water source for the desulfurication tower. This practice conserves 20,829 kL of water per year, which translates to NT$51,239 in saving.