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Figure 19.1--Annual average contribution of point and nonpoint sources of pollution to impaired river miles from 1988 to 1998 in the South. Source: U.S. Environmental Protection Agency 1990, 1992, 1994, 1996, 1998a, 2000a.

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Data behind this

Major and minor category	Impaired Miles
Point sources
Municipal	11,043
Storm sewers/runoff	10,852
Industrial	6,990
Land disposal	3,929
Total (point sources)	32,814
Non-point sources
Agriculture	44,326
Hydrologic/habitat modification	8,153
Resource extraction	6,554
Channelization	2,337
Construction	3,434
Silviculture	3,639
Natural	1,723
Total (non-point sources)	70,168