SUPPORTING STATEMENT

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SUPPORTING STATEMENT B

Drug Enforcement Administration (DEA) National Drug Threat Survey (NDTS)

OMB No. 1117-0052


    B. COLLECTION OF INFORMATION EMPLOYING STATISTICAL METHODS


    1. There are 12,782 local police departments, sheriff’s offices, four-year university police departments, constables/marshals, and offices of state law enforcement agencies in the potential respondent universe.  Using the 2008 Census of State and Local Law Enforcement Agencies conducted by the United States Department of Justice Bureau of Justice Statistics,  only agencies with 10 or more full-time equivalent sworn officers and patrol and response, criminal investigation, and/or traffic and vehicle responsibilities are included in the respondent universe. We plan to take a census of all these local agencies and offices of state agencies to gather data representative at the state level. Please see the attached table for a breakdown of the potential respondent universe by stratum. The response rate for 2016 was 52 percent.  Based on the average response rate for the past four years, the 2017 response rate is expected to be approximately 46 percent.  Documentation of the census plan is attached.

    2. The census for the 2017 National Drug Threat Survey includes all of the agencies in the potential respondent universe.  The census will allow for greater confidence in the results than in the past.  The expected 46% response rate would provide sufficient data for a 0.94 confidence interval at a 95% confidence level for the nation as a whole.  The average confidence interval by state at the 95% confidence level is expected to be 9.15.

    3. DEA personnel assigned to the Domestic Strategic Intelligence Unit (NTSD) and the Statistical Services Section (FRS) will be assigned to identify and verify appropriate survey recipients at sample agencies and conduct follow-up activities for non-responding agencies. A weighting adjustment will be made to correct for agency nonresponse.  Agencies found to have closed will be removed from the potential respondent universe.

    4. DEA personnel assigned to the Domestic Strategic Intelligence Unit (NTSD) designed the survey instrument in consultation with Gamaliel Rose (202-307-7088) and Rebecca Ciesielski (406-655-2933) of the DEA Statistical Analysis Unit (FRSA).  Mr. Rose and/or Ms. Ciesielski will analyze the survey results. 

Documentation for the 2017 National Drug Threat Survey Census Design


The National Drug Threat Survey (NDTS) is sponsored and conducted by the Drug Enforcement Administration (DEA).  The potential respondent universe for the 2017 NDTS was drawn from a subset of the responses to the 2008 Census of State and Local Law Enforcement Agencies (CSLLEA), which was conducted by the Bureau of Justice Statistics.  

Local police departments, sheriff’s offices, four-year university police departments, and constables/marshals were included in the potential respondent universe if they met the following criteria:
    • At least 10 full-time equivalent sworn officers1 on staff
    • Has responsibilities in at least one of the following areas: patrol and response, criminal investigation, and traffic and vehicle enforcement
    • Not known, from previous NDTS efforts, to have closed

The potential respondent universe also includes the local offices or barracks of primary state law enforcement agencies, state bureaus of investigation, and narcotics enforcement agencies that, overall, meet the criteria above.  The local offices or barracks of five entities not included in the 2008 CSLLEA were also included in the sampling frame in order to have coverage in the U.S. territories.  These entities are the American Samoa Department of Public Safety, the Guam Police Department, the Puerto Rico Police Department, the Commonwealth of the Northern Mariana Islands Department of Public Safety, and the Virgin Islands Police Department.

The total potential respondent universe contains 12,782 units.  These units are broken into state-level strata.
Table 1.  Definition of Organized Crime Drug Enforcement Task Force (OCDETF) Regions
  
OCDETF Region
State
 
Florida/Caribbean
FL
 

PR
 
Great Lakes
IN
 

IL 
(All counties not in West Central Region)

KY
 

MI
 

MN
 

OH
 

WI
 
Mid-Atlantic
DE
 

DC
 

MD
 

PA
 

VA
 

WV
 
New York/New Jersey
NJ
 

NY
 
New England
CT
 

MA
 

ME
 

NH
 

RI
 

VT
 
Pacific
AK
 

CA 
(All counties not in Southwest Region)

GU
 

HI
 

ID
 

MP
 

NV
 

OR
 

WA
 
Southeast
AR
 

AL
 

GA
 

LA
 

MS
 

NC
 

SC
 

TN
 
Southwest
AZ
 

CA
(counties of:  Imperial, Los Angeles Orange, Riverside, San Bernardino, San Diego, San Luis Obispo, Santa Barbara, Ventura)

NM
 

OK
 

TX
 
West Central
CO
 

IA
 

IL 

(counties of Alexander, Bond, Calhoun, Clark,  Clay, Clinton, Crawford, Cumberland, Edwards, Effingham, Fayette, Franklin, Gallatin, Hamilton, Hardin, Jackson, Jasper, Jefferson, Jersey, Johnson, Lawrence, Madison, Marion, Massac, Monroe, Perry, Pope, Pulaski, Randolph, Richland, Saline, St. Clair, Union, Wabash, Washington, Wayne, White, Williamson)


KS
 

MO
 

MT
 

ND
 

NE
 

SD
 

UT
 

WY
 
Table 2.  Potential Respondent Universe by Stratum

State
Number of Units 
Alabama
267
Alaska
64
American Samoa
1
Arizona
111
Arkansas
212
California
517
Colorado
176
Connecticut
121
Delaware
32
District of Columbia
2
Florida
370
Georgia
476
Guam
4
Hawaii
8
Idaho
83
Illinois
665
Indiana
280
Iowa
194
Kansas
188
Kentucky
185
Louisiana
219
Maine
133
Maryland
107
Massachusetts
367
Michigan
444
Minnesota
313
Mississippi
243
Missouri
363
Montana
77
Nebraska
88
Nevada
69
New Hampshire
147
New Jersey
511
New Mexico
109
New York
653
North Carolina
404
North Dakota
39
Northern Mariana Islands
5
Ohio
740
Oklahoma
228
Oregon
147
Pennsylvania
794
Puerto Rico
13
Rhode Island
46
South Carolina
194
South Dakota
61
Tennessee
264
Texas
770
Utah
119
Vermont
66
Virginia
276
South Dakota
61
Tennessee
264
Texas
770
Utah
119
Vermont
66
Virginia
276
Virgin Islands
3
Washington
209
West Virginia
153
Wisconsin
380
Wyoming
72