52 nawqa study areas

52 NAWQA Study Areas

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

Common Pesticides in Streams

AtrazineMetolachlor

Cyanazine

SimazinePrometon

TebuthiuronDiazinon

Chlorpyrifos

Carbaryl

0 10050 0 10050

UrbanAgricultural

Percentage of Samples with Detections

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

Common Organochlorine Compounds in Fish Tissue

0 10050 0 10050

UrbanAgricultural

Percentage of Samples with Detections

DDTChlordane

Dieldrin

Measured Atrazine in Streams

Prediction of Atrazine in Streams

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

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

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

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

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)

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

Potential to Affect Wildlife

0 10050Percentage of Sites Exceeding Benchmarks

OrganochlorinesIn Whole

Fish

Agricultural

Urban

Undeveloped

Mixed

Declining DDT in Fish

1969

500

0

1000

1974 1979 1984 1989 1994 1999

Con

cen

trat

ion

Median DDT

Wildlife Benchmark