Which of the following conditions is not suitable for the disposal of excreta or sewage?

Which of the following is an advantage of the conservancy system over water carriage system?

__ is used to lift surface water and move it to a nearby treatment plant.

What are the facilities including pumps and equipment for pumping fluids from one place to another are called?

Which of the following factors does the dry weather does not depend on?

Which of the following common unit is used to express the rate of water supply to a city or town?

The overall purpose of sanitation is to maintain the green environment alone.

What is the drainage basin also called as?