52 NAWQA Study Areas

1
52 NAWQA Study Areas
2
Occurrence in Water
Land use
Streams
Shallow Ground Water
Agricultural
Streams
Shallow Ground Water
Urban
Streams
Shallow Ground Water
Undeveloped
Streams
Major Aquifers
Mixed
0
100
50
Percentage of Samples with Detections
3
Common Pesticides in Streams
Urban
Agricultural
Atrazine
Metolachlor
Cyanazine
Simazine
Prometon
Tebuthiuron
Diazinon
Chlorpyrifos
Carbaryl
0
100
50
0
100
50
Percentage of Samples with Detections
4
Organochlorines in Fish and Bed Sediment
Land use
Fish
Sediment
Agricultural
Fish
Sediment
Urban
Fish
Sediment
Undeveloped
Fish
Sediment
Mixed
0
100
50
Percentage of Samples with Detections
5
Common Organochlorine Compounds in Fish Tissue
Urban
Agricultural
DDT
Chlordane
Dieldrin
0
100
50
0
100
50
Percentage of Samples with Detections
6
Measured Atrazine in Streams
7
Prediction of Atrazine in Streams
8
Trends in Corn-Belt Herbicides
1
Alachlor
Cyanazine
0.1
Herbicide Use
0.01
Acetochlor
0.001
1
0.1
Stream Concentrations
0.01
0.001
1992
1994
1996
1998
2000
9
Frequency of Mixtures
100
75
75 have 5 or more
Percentage of Samples with Equal or Greater Number
50
50
25 have 10 or more
25
0
2
4
6
8
10
1
3
5
7
9
Number of Pesticides in Sample
10
Potential to Affect Humans
Streams
Ground Water
Agricultural
Streams
Ground Water
Urban
Streams
Ground Water
Undeveloped
Streams
Major Aquifers
Mixed
0
100
50
Percentage of Sites Exceeding Benchmarks
11
Potential to Affect Aquatic Life
Water
Bed Sediment
Agricultural
Water
Bed Sediment
Urban
Water
Bed Sediment
Undeveloped
Water
Bed Sediment
Mixed
0
100
50
Percentage of Sites Exceeding Benchmarks
12
Pesticides with Exceedances of Aquatic-Life
Benchmarks
20 Pesticides with Exceedances (57 Sites)
Chlorpyrifos
Azinphos-Methyl
Agriculture
100
50
0
10 Pesticides with Exceedances (83 Sites)
Diazinon
Chlorpyrifos
Urban
100
50
0
Percentage of Sites Exceeding Benchmarks
13
Trends in Urban Streams
Chlorpyrifos
Malathion
Diazinon
100
50
Percentage of Sites
0
1993-1994
1995-1997
1998-2000
1993-1994
1995-1997
1998-2000
1993-1994
1995-1997
1998-2000
Sampling Period
14
Potential to Affect Wildlife
Agricultural
Organochlorines In Whole Fish
Urban
Undeveloped
Mixed
0
100
50
Percentage of Sites Exceeding Benchmarks
15
Declining DDT in Fish
1000
Median DDT
Concentration
500
Wildlife Benchmark
0
1969
1974
1979
1984
1989
1994
1999