Which department should I complain to if the sewer is blocked?

Legal analysis: the property company provides maintenance, security and other property services according to the agreement in the property service contract, so whether the property company can bear the responsibility depends on whether it can breach the contract. According to the contract, the property management company has the obligation to maintain and repair the public facilities and equipment in the community. The blockage of the sewer pipe caused losses. First of all, we must find out what is the cause of sewer blockage. If it is because the sewer pipe is in disrepair for a long time, and the property management company fails to find the maintenance in time, which leads to the overflow of water in the normal use of the owner, then the property management company fails to fulfill the maintenance obligation agreed in the contract and should bear the liability for breach of contract. If it is caused by improper use of the upstairs owner, such as throwing some garbage into the sewer pipe, which affects the normal drainage of the sewer pipe, then the upstairs owner should compensate. In this case, if the property management company has fulfilled its legal duty of care and has not been slower than the timely performance of the obligation to find faults and maintain, then the property management company will not bear the responsibility.

Legal basis: Regulations on Property Management

Article 1 These Regulations are formulated in order to standardize property management activities, safeguard the legitimate rights and interests of owners and property service enterprises, and improve the living and working environment of the people.

Article 2 The term "property management" as mentioned in these Regulations refers to the activities in which the owner selects a property service enterprise, and the owner and the property service enterprise carry out maintenance, conservation and management of the house, supporting facilities, equipment and related sites in accordance with the provisions of the property service contract, so as to maintain the environmental sanitation and related order in the property management area.