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Legend (Pollution/Baltimore_Sewer_Overflow_Frequency_revFeb2017)

Baltimore Sewer Overflows (January 2011 - December 2016) (0)
1 1
2 - 3 2 - 3
4 - 6 4 - 6
7 - 11 7 - 11
12 - 19 12 - 19