The public system needs to provide a stable and clean environment for production. For water, gas, compressed air, inert gas, etc., it should meet the cleanliness requirements of the corresponding pharmaceutical process, GMP and the corresponding guidelines and regulations. In the pharmaceutical industry, the water needed for production is specially treated. In order to ensure the plant is clean or the fermentation process is pollution-free, the gas needs to be sterilized and filtered.

The stable public system provides a strong support for continuous production. Water, gas and air environmental systems in production are subject to special treatment to meet their own characteristics and the requirements of GMP and corresponding guidelines and regulations.