In 2017, the US government spent $22.7B on Water, sewer, and environmental services. The agency which purchased the largest amount of Water, sewer, and environmental services in 2017 was Department of the Navy ($5.8B), followed by Department of the Army ($4.67B) and the Department of the Air Force ($3.18B).
Accounting, management, administrative, and miscellaneous services
NAPCS Group