Which department should I complain about pump noise?

The noise of water pump belongs to low-frequency noise pollution, and the state has relevant testing standards. You can find the environmental protection department to test it. If it exceeds the standard, see where the pump belongs. Belonging to enterprises or institutions or for profit, environmental management. For a non-profit house, look for a housing authority or a property. If you can't make up for it, take the test results issued by environmental protection and go to civil litigation.