Environmental Monitoring and Assessment

, Volume 186, Issue 3, pp 1355–1370

Community air monitoring for pesticides. Part 3: using health-based screening levels to evaluate results collected for a year

  • Pamela Wofford
  • Randy Segawa
  • Jay Schreider
  • Veda Federighi
  • Rosemary Neal
  • Madeline Brattesani


The CA Department of Pesticide Regulation (CDPR) and the CA Air Resources Board monitored 40 pesticides, including five degradation products, in Parlier, CA, to determine if its residents were exposed to any of these pesticides and, if so, in what amounts. They included 1,3-dichloropropene, acrolein, arsenic, azinphos-methyl, carbon disulfide, chlorpyrifos and its degradation product, chlorthalonil, copper, cypermethrin, diazinon and its degradation product, dichlorvos, dicofol, dimethoate and its degradation product, diuron, endosulfan and its degradation product, S-ethyl dipropylcarbamothioate (EPTC), formaldehyde, malathion and its degradation product, methyl isothiocyanate (MITC), methyl bromide, metolachlor, molinate, norflurazon, oryzalin, oxyfluorfen, permethrin, phosmet, propanil, propargite, simazine, SSS-tributylphosphorotrithioate, sulfur, thiobencarb, trifluralin, and xylene. Monitoring was conducted 3 days per week for a year. Twenty-three pesticides and degradation products were detected. Acrolein, arsenic, carbon disulfide, chlorpyrifos, copper, formaldehyde, methyl bromide, MITC, and sulfur were detected in more than half the samples. Since no regulatory ambient air standards exist for these pesticides, CDPR developed advisory, health-based non-cancer screening levels (SLs) to assess acute, subchronic, and chronic exposures. For carcinogenic pesticides, CDPR assessed risk using cancer potency values. Amongst non-carcinogenic agricultural use pesticides, only diazinon exceeded its SL. For carcinogens, 1,3-dichloropropene concentrations exceeded its cancer potency value. Based on these findings, CDPR has undertaken a more comprehensive evaluation of 1,3-dichloropropene, diazinon, and the closely related chlorpyrifos that was frequently detected. Four chemicals—acrolein, arsenic, carbon disulfide, and formaldehyde—sometimes used as pesticides were detected, although no pesticidal use was reported in the area during this study. Their presence was most likely due to vehicular or industrial emissions.


Community air monitoring Pesticides Health-based screening levels Chlorpyrifos Diazinon 1-3 Dichloropropene 


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Pamela Wofford
    • 1
  • Randy Segawa
    • 1
  • Jay Schreider
    • 2
  • Veda Federighi
    • 3
  • Rosemary Neal
    • 1
  • Madeline Brattesani
    • 1
  1. 1.Environmental Monitoring Branch, Department of Pesticide RegulationCA Environmental Protection AgencySacramentoUSA
  2. 2.Medical Toxicology Branch, Department of Pesticide RegulationCA Environmental Protection AgencySacramentoUSA
  3. 3.Executive Office, Department of Pesticide RegulationCA Environmental Protection AgencySacramentoUSA

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