UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON D.C., 20460 

MAY 0 1 20\4 

OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

MEMORANDUM 

SUBJECT: 

FROM: 

THRU: 

TO: 

Usage Report in Support ofChlorpyrifos (059101) 

JihadAlsadek,PhD,Economist ~~~It-~ Science and Information Analysis Branch 

Biological and Economic Analysis Division (7503P) 

Steve Jarboe, Team leader ... .J....-----' Science Information and Analysis Branch 

Biological and Economic Analysis Division (7503P) 

Joe Wolf, Chemical Review Manager 

Risk Management and Implementation Branch 2 

Pesticide Re-evaluation Division (7508P) 

This memorandum transmits an update of the Screening Level Usage Analysis (SLUA) report for 

Chlorpyrifos that was done in 2012. The usage data in the updated SLUA are an amalgamation 

ofUSDA/NASS and Private Pesticide Market Research data from 2004 to 2012. The new SLUA. 

(2014) shows an increase in usage on alfalfa, asparagus, cabbage, lettuce, peanuts, green peas, 

pistachios, tomatoes, watermelons and wheat and a decrease in use on almonds, apples, 

cantaloupes, com, cotton, dry beans/peas, grapefruit, lemons, nectarines, sorghum, tobacco and 

walnuts. New uses showed up in the newer SLUA on Brussels sprouts, canola, cotton seed 

treatment, peppers, sorghum seed treatments, soybean seed treatments and wheat seed treatments. 

Some crops (carrots, figs and spinach) were in the old SLUA and dropped off in the updated 

SLUA The use on cantaloupes, lettuce, pistachios, squash, tomatoes and watermelons are 

denoted by a "+" sign in the SLUA to show that these crops are not known to be listed on active 

end use product registrations or as Section 18 emergency exemptions when this SLUA report was 

run. 

For questions, comments and other usage information requests, please contact me at 703-

308-8140. 
Chlorpyrifos (059101) 

Screening Level Usage Analysis (SLUA) 

Date: May 1, 2014 

What is a Screening Level Usage Analysis (SLUA)? 

• Available estimates of pesticide usage data for a particular active ingredient that is used on 

agricultural crops in the United States. 

• Pesticide usage data obtained from various sources. The data are then merged, averaged, and 

rounded so that the presented information is not proprietary, business confidential, or trade secret. 

What does it contain? 

• Pesticide usage data for a single active ingredient only. 

• Agricultural use sites (crops) that the pesticide is reported to be used on. 

• Available pesticide usage information from U.S. states that produce 80% or more of a crop, in most 

cases, or less than 80%, in rare cases, depending on the scope of the survey and available resources. 

• Annual percent of crop treated (average & maximum) for each agricultural crop. 

• Average annual pounds of the pesticide applied for each agricultural crop (i.e., for the states 

surveyed, not for the entire United States). 

What assumptions can I make about the reported data? 

• Average pounds of active ingredient applied- Values are calculated by merging pesticide usage 

data sources together; averaging across all observations, then rounding. Note: If the estimated value 

is less than 500, then that value is labeled <500. Estimated values between 500 & <1, 000,000 are 

rounded to 1 significant digit. Estimated values of 1, 000, 000 or greater are rounded to 2 significant 

digits.) 

• Average percent of crop treated- Values are calculated by merging data sources together; 

averaging by year, averaging across all years, & rounding to the nearest multiple of 5. Note: If the 

estimated value is less than 2.5, then the value is labeled <2.5. If the estimated value is less than 1, 

then the value is labeled <1. 

• Maximum percent of crop treated - Value is the single maximum value reported across all data 

sources, across all years, & rounded up to the nearest multiple of 5. Note: If the estimated value is 

less than 2.5, then the value is labeled <2.5. 

What are the data sources used? 

• USDA-NASS (United States Department of Agriculture's National Agricultural Statistics Service)-

pesticide usage data from 2004 to 2012. 

• Private pesticide market research- pesticide usage data from 2004 to 2012. 

• California Department of Pesticide Regulation (DPR) Pesticide Use Reporting (PUR) data for 

2004 to 2011. 

What are the limitations to the data? 

• Additional registered uses may exist but are not included because the available surveys do not report 

usage (e.g., small acreage crops). 

• Lack of reported usage data for the pesticide on a crop does not imply zero usage. 

• Usage data on a particular site may be noted in data sources, but not quantified. In these instances, 

the site would not be reported in the SLUA. 

• Non-agricultural use sites (e.g., turf, post-harvest, mosquito control, etc.) are not reported in the 

SLUA. A separate request must be made to receive these estimates. 

• Some sites show some use, even though they are not on the label. This usage could be due to 

various factors, including, but not limited to Section 18 requests, existing stocks ofthe chemical, 

data collection errors, and experimental use permits (EUPs). 
Date: May 1, 2014 

Screening Level Estimates of Agricultural Uses of Chlorpyrifos (059101) 

Sorted Alphabetically 

Reporting Years: 2004-2012 

Average Percent Crop Treated 

Crop Lbs. A.I. Average Maximum 

1 Alfalfa 500,000 5 10 

2 Almonds 400,000 25 40 

3 Apples 300,000 55 65 

4 Aspara2us 20,000 40 60 

5 Beans, Green 3,000 <2.5 5 

6 Broccoli 90,000 45 60 

7 Brussels Sprouts* 4,000 NC NC 

8 Cabbage 10,000 15 25 

9 Canola 40,000 10 10 

10 Cantaloupes+ 2,000 <2.5 5 

11 Cauliflower 20,000 40 60 

12 Cherries 70,000 30 45 

13 Corn 1,400,000 <2.5 5 

14 Corn (Seed Treatment) <500 <1 <2.5 

15 Cotton 90,000 <2.5 <2.5 

16 Cotton (Seed Treatment) 1,000 <2.5 5 

17 Cucumbers 3,000 <2.5 5 

18 Dry Beans/Peas 9,000 <2.5 5 

19 Grapefruit 50,000 20 35 

20 Grapes 200,000 10 20 

21 Hazelnuts 7,000 15 25 

22 Lemons 80,000 35 60 

23 Lettuce+ 4,000 <2.5 <2.5 

24 Nectarines 8,000 10 20 

25 Onions 60,000 40 50 

26 Oranges 500,000 20 35 

27 Peaches 60,000 25 40 

28 Peanuts 200,000 5 15 

29 Pears 20,000 15 30 

30 Peas, Green 2,000 <2.5 <2.5 

31 Pecans 300,000 30 40 

32 Peppers 2,000 <2.5 5 

33 Pistachios+ 2,000 <2.5 <2.5 

34 Plums/Prunes 20,000 10 15 

35 Potatoes 3,000 <1 <2.5 

36 Pumpkins 2,000 <2.5 5 

37 Sorghum 10,000 <1 <2.5 

38 So~hum (Seed Treatment) <500 <1 <2.5 

39 Sovbeans 1.500.000 5 10 
40 Soybeans _(Seed Treatment)_ <500 <1 <2.5 

41 Squash+ 1,000 <2.5 5 

42 Strawberries 10,000 20 35 

43 Sugar Beets 100,000 10 20 

44 Sunflowers 50,000 5 10 

45 Sweet Corn 100,000 10 20 

46 Tangelos 2,000 10 15 

47 Tangerines 7,000 10 20 

48 Tobacco 80,000 15 20 

49 Tomatoes+ 3,000 <2.5 <2.5 

50 Walnuts 400,000 45 55 

51 Watermelons+ 1,000 <2.5 <2.5 

52 Wheat 400,000 5 10 

53 Wheat (Seed Treatment) <500 <1 <2.5 

All numbers are rounded. 

<500: less than 500 pounds of active ingredients. 

<2.5: less than 2.5 percent of crop is treated. 

<1: less than 1 percent of crop is treated. 

* Based on CA DPR data only (80% or more of U.S. acres grown are in California) 

NC: not calculated, only pounds a.i. available. 

+: Crops not known to be listed on active end use product registrations or as Section 18 emergency 

exemptions when this report was run. 

SLUA data sources include: 

USDA-NASS (United States Department of Agriculture's National Agricultural Statistics Service) 

Private Pesticide Market Research 

California DPR (Department of Pesticide Regulation) 

These results reflect amalgamated data developed by the Agency and are releasable to the public.