166 7 Pollution of Aquatic Systems: Pollution Through Eutrophication, Fecal Materials, and Oil Spills
General Pollutant Number of TMDLs Approved Percent ofReported
METALS (OTHER THAN
MERCURY)(^5263) 20.93
PATHOGENS^5073 20.17
NUTRIENTS^3146 12.51
SEDIMENT^2340 9.31
OXYGEN DEPLETION^1383 5.50
PH^1160 4.61
TEMPERATURE^1020 4.06
AMMONIA^909 3.61
PESTICIDES^845 3.36
MERCURY^780 3.10
SULFATES^769 3.06
TURBIDITY^583 2.32
SALINITY/TDS/CHLORIDES^538 2.14
CHLORINE^322 1.28
PCBS^242 .96
TOXIC INORGANICS^168 .67
OTHER TOXIC ORGANICS^134 .53
CAUSE UNKNOWN -
BIOLOGICAL INTEGRITY
(^132) .52
OTHER CAUSE^72 .29
ALGAL GROWTH^65 .26
TOTAL TOXICITY^60 .24
FLOATABLES^46 .18
HABITAT ALTERATION^24 .10
NOXIOUS AQUATIC
PLANTS
(^21) .08
DIOXINS^17 .07
RADIATION^17 .0 7
OIL AND GREASE^12 .0 5
TASTE, COLOR AND ODOR^5 .0 2
FLOW ALTERATION^1 .0 0
Fig. 7.1 Total Nationwide Number of TMDLs Approved since October 1, 1995 reported to EPA: 25,147 (Source: Anonymous 2007 )