Environmental engineering encompasses a broad range of disciplines, including but not limited to water resources engineering, air quality engineering, solid waste management, environmental chemistry, environmental microbiology, and ecological engineering.

In water resources engineering, environmental engineers work on designing and managing systems for the treatment and distribution of drinking water, as well as the collection, treatment, and disposal of wastewater. They also deal with issues related to stormwater management, flood control, and erosion prevention.

Air quality engineering focuses on monitoring and controlling air pollutants to minimize their impact on human health and the environment. This includes designing systems for industrial emissions control, developing strategies to reduce vehicle emissions, and assessing indoor air quality in buildings.

Solid waste management involves the collection, recycling, treatment, and disposal of solid waste in an environmentally responsible manner. Environmental engineers work to minimize the generation of waste, promote recycling and composting, and manage hazardous waste streams safely.