Estimated Pollutant Loads to San Francisco Bay and Delta

Data Collected from 1999


The above Charts shows the source of pollution into the Delta Bay Estuary in kg’s for every year.

ND=No Data

The Los Angeles Times reported that the U.S. Embassy in Tokyo advised pregnant women and children under 3 living in Japan to avoid drinking tap water due to elevated levels of radiation in vegetables growing near the Fukushima Daiichi power plant. After reading this I became interested in pollutants that may be in our drinking water here in California.

The San Francisco Bay Delta Estuary is the largest estuary on the west coast of the United States. It provides 25 million Californians with drinking water and irrigates 4.5 million acres of agricultural land. The Bay Delta ecosystem is rich in biodiversity supporting 750 species of plants, fish, and all kinds of wildlife, some of which are endangered or threatened.

However, the delta is polluted with toxic chemicals from runoff from cities, industrial facilities and farms and a variety of other sources.

This story is important to San Franciscans since the Bay Deltas watershed covers 40% of California and San Francisco is a drainage basin for the estuary.

Follow up stories would include how much pollution San Francisco contributes to the Bay Delta and how the pollution is affecting the health of San Franciscans.


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