Greenfield's Wastewater Treatment and Collection Facility are two departments, performing complementary functions:

• Wastewater Treatment treats City sewage before it enters the Brandywine Creek. 
• The Collection Facility maintains all sanitary and storm sewers throughout the City.

The Greenfield Wastewater Treatment Plant serves approximately 4,700 metered customers and has a flow capacity of 4.0 million gallons per day.