Lecture+11-24-08+Pesticides+and+Air+Quality-+Kegley

Lecture+11-24-08+Pesticides+and+Air+Quality-+Kegley -...

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Pesticides and Air Quality in California Susan Kegley, Ph.D., Pesticide Action Network skegley@panna.org
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Overview • Pesticide use and toxicity • Airborne pesticides • Pesticide poisoning incidents • CA state air monitoring program • Community monitoring for drift • Possible approaches to reducing drift
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Pesticides Include
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Pesticide Use • 190 million pounds of pesticides reported used in CA in 2006 • ~70 million pounds of the 2006 reported total are among the most toxic ( “Bad Actor” pesticides ) – highly acutely toxic (WHO, EPA label, NTP LD 50 ) – known or probable carcinogens (IARC, EPA or Prop 65) – reproductive or developmental toxicants (Prop 65) – cholinesterase inhibitors (DPR) – known groundwater contaminants (DPR)
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Pesticide Sales 0 50 100 150 200 250 300 350 400 1992 1995 1998 2001 2004 California Pesticide Sales and Use 1991–2006 Reported Pesticide Use Reported Pesticide Sales Millions of pounds of active ingredient Year
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Comparison of Industrial Toxic Releases to Pesticide Releases: All U.S. 20% 80% Pounds of pesticides sold 2000-2001 average (U.S. EPA) Pounds of manufacturing, processing and resource extraction releases to air, land and water (U.S. EPA Toxics Release Inventory, 2002) All United States
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Comparison of Industrial Toxic Releases to Pesticide Releases: California 85% 15% Pounds of pesticides sold (Water treament chemicals excluded, CA Dept. of Pesticide Regulation, 2002) Pounds of manufacturing, processing and resource extraction releases to air, land and water (U.S. EPA Toxics Release Inventory, 2002) California
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Airborne pesticides—Drift Spray drift: – Droplets or dust that drift off-site during or just after an application Post-application drift: Volatilization drift: Invisible!! – Wind-blown dust contaminated with pesticides
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Fumigants and Community Poisonings Earlimart, CA (Tulare County) – November 1999, metam sodium – 178 people Arvin, CA (Kern County) – July 2002, metam sodium – 270 people Lamont, CA (Kern County) – October 2003, chloropicrin – 235 people Salinas, CA (Monterey County) – October 2005, chloropicrin – At least 350 people Yearington, NV – October 2007, chloropicrin – 27 workers, 1/4 mile away
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Secondhand Pesticides • Low-level, long-term exposure • Few or only mild symptoms of exposure • Adverse effects can take many years to appear • Sensitive individuals may not be able to tolerate even this exposure
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Health Effects of Chronic Exposure to Pesticide Drift • Respiratory illness: Asthma and lung irritation (which increases susceptibility to respiratory infections) • Linked to birth defects, miscarriage, and Parkinson’s disease • Linked to increases in cancer, especially children: Leukemia, brain cancer, bone cancer, non-Hodgkin’s lymphoma, and others
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0 2 4 6 8 10 12 Brain cancer, home pesticide use Brain cancer, home insecticide use Leukemia, home pesticide use Leukemia, garden pesticide use Acute non-lymphocytic leukemia, extermination Non-Hodgkin's lymphoma, home pesticide use Brain cancer, home flea/tick foggers Lung cancer, smoking 1 pack per day 6.2 2.3 3.8 6.5 3.5 7.2 10.8 9.5 Odds Ratio
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This document was uploaded on 07/22/2009.

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Lecture+11-24-08+Pesticides+and+Air+Quality-+Kegley -...

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