Water pollution control fees for enterprise and sewage systems are levied every six months. Regulatory entities are required to file and pay the fees of the previous term (six months) by the end of January and July every year. In the interest of administrative simplicity, convenience, and promoting electronic services, the filing of water pollution fees is primarily done online, with a supplementary option for paper-based filing.

As such, MOENV set up the Online Filing and Inquiry System for Water Pollution Control Fees, which provides basic essential services. It also includes information on relevant laws and regulations, payment methods, frequently asked questions, and latest updates, allowing easy information access and streamlining the fee collection process.