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52 NAWQA Study Areas

52 NAWQA Study Areas. 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. 50. 100. Percentage of Samples with Detections.

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52 NAWQA Study Areas

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  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 50 100 Percentage of Samples with Detections

  3. Common Pesticides in Streams Agricultural Urban Atrazine Metolachlor Cyanazine Simazine Prometon Tebuthiuron Diazinon Chlorpyrifos Carbaryl 0 50 100 0 50 100 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 50 100 Percentage of Samples with Detections

  5. Common Organochlorine Compounds in Fish Tissue Agricultural Urban DDT Chlordane Dieldrin 0 50 100 0 50 100 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 1 2 3 4 5 6 7 8 9 10 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 50 100 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 50 100 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 50 100 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

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