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While the amount of pollution that wastewater treatment plants contribute to the Bay is declining, the spread of asphalt, pavement, and other impervious surfaces in suburbs and cities is increasing stormwater pollution.
NASA Earth Observatory images by Joshua Stevens and Jesse Allen, based on Landsat data from the U.S. Geological Survey and a paper by Song et al. (2015). Sparrows Point photograph courtesy of The Center for Land Use Interpretation. Bioretention photograph courtesy of Community & Environmental Defense Services. Caption by Adam Voiland.
Published September 20, 2016
Data acquired 1984 - 2016