The collection consists of files of the former Bureau of Sanitary Engineering of the California Department of Public Health, located in Berkeley, California (now known as the Department of Health Services), relating to water quality.

The collection consists of materials related to the history, maintenance, and restoration of the Wildcat Creek, including materials related to the Urban Creek Council, the Wildcat Creek Monitoring Project, and environmental studies of Wildcat Creek.

The collection consists of materials related to the Wildcat Creek Citizen Monitoring Project, which was a project set up to establish a water quality monitoring program for Wildcat Creek, and get community involvement in monitoring and promoting the health of the Wildcat Creek watershed.