Creek Watch is a free iPhone application designed to help citizen scientists monitor the health of their local watershed. Whenever passing by a waterway, citizen scientists can spend a few seconds using the Creek Watch application to snap a picture and report how much water and trash they see. IBM, which created the app, aggregates the data and share it with water control boards to help them track pollution and manage water resources.

The Creek Watch App uses four pieces of data to help watershed groups, agencies and scientists track pollution, manage water resources, and plan environmental programs:
The amount of water: empty, some or full.
The rate of flow: still, moving slowly or moving fast.
The amount of trash: none, some (a few pieces), or a lot (10 or more pieces).
A picture of the waterway.

Creek Watch is a project developed at IBM Research - Almaden in consultation with the California State Water Resources Control Board's Clean Water Team.