Download - 52 NAWQA Study Areas
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52 NAWQA Study Areas
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Occurrence in Water
0 10050
StreamsShallow Ground Water
Shallow Ground Water
Shallow Ground Water
Streams
Streams
Streams
Major Aquifers
Percentage of Samples with Detections
Land use
Agricultural
Urban
Undeveloped
Mixed
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Common Pesticides in Streams
AtrazineMetolachlor
Cyanazine
SimazinePrometon
TebuthiuronDiazinon
Chlorpyrifos
Carbaryl
0 10050 0 10050
UrbanAgricultural
Percentage of Samples with Detections
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Organochlorines in Fish and Bed Sediment
0 10050
FishSediment
Sediment
Sediment
Fish
Fish
Fish
Sediment
Percentage of Samples with Detections
Land use
Agricultural
Urban
Undeveloped
Mixed
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Common Organochlorine Compounds in Fish Tissue
0 10050 0 10050
UrbanAgricultural
Percentage of Samples with Detections
DDTChlordane
Dieldrin
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Measured Atrazine in Streams
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Prediction of Atrazine in Streams
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Trends in Corn-Belt Herbicides
0.001
0.01
0.1
1
0.001
0.01
0.1
1
1992 1994 1996 1998 2000
CyanazineAlachlor
Acetochlor
HerbicideUse
StreamConcentrations
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Frequency of Mixtures
2Number of Pesticides in Sample
4 6 8 100
50
100
Percentage ofSamples withEqual or GreaterNumber
1 3 5 7 9
75
50
25
75% have 5 or more
25% have 10or more
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Potential to Affect Humans
0 10050
Streams
Ground Water
Ground Water
Ground Water
Streams
Streams
Streams
Major Aquifers
Percentage of Sites Exceeding Benchmarks
Agricultural
Urban
Undeveloped
Mixed
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Potential to Affect Aquatic Life
0 10050
WaterBed Sediment
Bed Sediment
Bed Sediment
Water
Water
Water
Bed Sediment
Percentage of Sites Exceeding Benchmarks
Agricultural
Urban
Undeveloped
Mixed
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Pesticides with Exceedances of Aquatic-Life Benchmarks
DiazinonChlorpyrifos
ChlorpyrifosAzinphos-Methyl
0 10050
Percentage of Sites Exceeding Benchmarks
Agriculture
Urban
0 10050
20 Pesticides with Exceedances (57% Sites)
10 Pesticides with Exceedances (83% Sites)
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Trends in Urban Streams
1993
-1994
1995
-1997
1998
-2000
1993
-1994
1995
-1997
1998
-2000
1993
-1994
1995
-1997
1998
-2000
0
50
100
Sampling Period
Per
cen
tage
of
Sit
es
Chlorpyrifos Malathion Diazinon
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Potential to Affect Wildlife
0 10050Percentage of Sites Exceeding Benchmarks
OrganochlorinesIn Whole
Fish
Agricultural
Urban
Undeveloped
Mixed
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Declining DDT in Fish
1969
500
0
1000
1974 1979 1984 1989 1994 1999
Con
cen
trat
ion
Median DDT
Wildlife Benchmark