The San Diego Bay Watersheds Common Grounds Project was created to incorporate data from water quality monitoring programs and integrate this data on a watershed level using a web-based interactive application to serve as a broad communication, education and decision-making tool; and to further develop the region's capacity to understand and assess processes affecting our water resources.

Exceedance Maps

Exceedance Maps show when a parameter measured (such as heavy metals) exceeds the Maximum Contamination Limit set by the State Water Resources Control Board. On the Exceedance Maps, which are separated by watershed and parameter measured, a red point indicates an exceedance of the water quality standard on the date that parameter was measured. Hovering over a point will give more information on the measurement at that point. For more information on the Water Quality Objectives from which the Exceedance Maps were derived, click here.






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