Animal and Plant Health Inspection Service
NAHMS Swine Studies
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In light of the substantial market disruptions due to COVID-19, the original timelines for the National Animal Health Monitoring System's (NAHMS) Swine 2020 Study were revised. The study will now begin in 2021. We will continue to update this page as more information becomes available.
The NAHMS Swine 2021 study will focus and report on two distinct U.S. swine populations. The Large Enterprise segment of the study will take an in-depth look at swine operations with 1,000 or more pigs and will take place between July 2021 and January 2022. The Small Enterprise segment of the study will concentrate on swine operations with fewer than 1,000 pigs and will take place between May and July 2021.
Both segments of the Swine 2021 study will provide participants, industry, academia, trading partners, and animal-health officials with valuable information on the Nation’s swine population. This information will also serve as a basis for education and research related to swine health and management.
Summary estimates from the study’s Large Enterprise segment will provide insights on how the majority of U.S. pigs are produced, their health status, and veterinary or biosecurity measures taken to maintain their health.
Summary estimates from the study’s Small Enterprise segment will reveal any changes in this more traditional part of the U.S. swine industry. Objectives of the Small Enterprise segment include estimating the use of newer husbandry technologies being adopted by smaller U.S. swine operations and providing information on the growing niche-market products these operations produce.
As with the four previous NAHMS swine studies, NAHMS Swine 2012 was national in scope, collaborative in nature, and voluntary. Data collected during the study were strictly confidential and used to generate scientifically based and statistically valid national estimates, to be used for education, research, and policy development.
Swine 2012 Part III: Changes in the U.S. Swine Industry, 1995-2012 (pdf 2.29mb 8/17)
Swine 2012 Part II: Reference of Swine Health and Health Management in the United States, 2012 (pdf 2.1mb 2/16) [rev 2/20]
Swine 2012 Part I: Baseline Reference of Swine Health and Management in the United States, 2012 (pdf 2.0mb 1/15)
Swine 2012: Reference of Management Practices on Small-enterprise Swine Operations in the United States, 2012 (pdf 1.5mb 2/14) [rev 8/13/14]
Small-Enterprise Swine 2007: Reference of Management Practices on Small-Enterprise Swine Operations in the United States, 2007 (pdf 599kb 2/09)
Highlights of Small Enterprise Swine 2007 Study (pdf 38kb 2/09)
Swine 2006 Part IV: Changes in the U.S. Pork Industry, 1990-2006 (pdf 1.5mb 11/08)
Swine 2006 Part III: Reference of Swine Health, Productivity, and General Management in the United States, 2006 (pdf 688kb 3/08)
Swine 2006 Part II: Reference of Swine Health and Health Management Practices in the United States, 2006 (pdf 771kb 12/07)
Swine 2006 Part I: Reference of Swine Health and Management Practices in the United States, 2006 (pdf 521kb 10/07)
Swine 2006 Study Information (pdf 38kb 11/05)
Swine 2000 Part IV: Changes in the U.S. Pork Industry, 1990-2000 (pdf 2.5mb 4/05)
Swine 2000 Part III: Reference of Swine Health & Environmental Management in the United States, 2000 (pdf 2.3mb 9/02)
Swine 2000 Part II: Reference of Swine Health & Health Management in the United States, 2000 (pdf 4.0mb 5/02)
Swine 2000 Part I: Reference of Swine Health & Management in the United States, 2000 (pdf 1.1mb 9/01)
National seroprevalence of PRRS, mycoplasma, and swine influenza virus (AASV, 2003) (pdf 65 kb)
Part III: Changes in the U.S. Pork Industry, 1990-1995 (pdf 349kb 10/97)
Part II: Reference of 1995 U.S. Grower/Finisher Health & Management Practices (pdf 1.1mb 5/96)
Swine '95 Part I: Reference of 1995 Swine Management Practices (pdf 1.1mb 10/95)
Morbidity/Mortality and Health Management of Swine in the United States (pdf 196kb 1/92)
Index of NAHMS Swine Information (pdf 15.7mb 10/02)
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