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. 2021 Feb 12;70(6):212–216. doi: 10.15585/mmwr.mm7006e2

TABLE 1. Effective dates of statewide mask mandates — 10 COVID-19–Associated Hospitalization Surveillance Network sites with statewide mask mandates, March–October 2020.

State Effective date of statewide mask mandate Source
California
 Jun 18, 2020
 California Health Order (Jun 18, 2020) https://www.countyofnapa.org/DocumentCenter/View/17945/Guidance-for-Face-Coverings_06-18-2020)
Colorado
 Jul 16, 2020
 Colorado Executive Order No. D 2020–138 (Jul 16, 2020) https://www.colorado.gov/governor/sites/default/files/inline-files/D%202020%20138%20Mask%20Order.pdf)
Connecticut
 Apr 20, 2020
 Connecticut Executive Order No. 7BB (Apr 17, 2020) (https://portal.ct.gov/-/media/Office-of-the-Governor/Executive-Orders/Lamont-Executive-Orders/Executive-Order-No-7BB.pdf)
Maryland
 Apr 18, 2020
 Maryland Executive Order No. 20–04–15–01 (Apr 15, 2020) (https://governor.maryland.gov/wp-content/uploads/2020/04/Masks-and-Physical-Distancing-4.15.20.pdf)
Michigan*
 Apr 26, 2020
 Michigan Executive Order No. 2020–59 (Apr 24, 2020) (https://content.govdelivery.com/attachments/MIEOG/2020/04/24/file_attachments/1435194/EO%202020-59.pdf)
Minnesota
 Jul 24, 2020
 Minnesota Emergency Executive Order 20–81 (Jul 22, 2020) (https://mn.gov/governor/assets/EO%2020-81%20Final%20Filed_tcm1055-441323.pdf)
New Mexico
 Jun 1, 2020
 New Mexico Health Order (Jun 1, 2020) (https://cv.nmhealth.org/wp-content/uploads/2020/06/060120-PHO.pdf)
New York
 Apr 17, 2020
 New York Executive Order No. 202.17 (Apr 15, 2020) (https://www.governor.ny.gov/news/no-20217-continuing-temporary-suspension-and-modification-laws-relating-disaster-emergency)
Ohio
 Jul 23, 2020
 Ohio Health Order (Jul 23, 2020) (https://coronavirus.ohio.gov/static/publicorders/Directors-Order-Facial-Coverings-throughout-State-Ohio.pdf)
Oregon Jul 1, 2020 Oregon Health Order (Jun 30, 2020) (https://web.archive.org/web/20200702101516/https://sharedsystems.dhsoha.state.or.us/DHSForms/Served/le2288K.pdf)

Abbreviation: COVID-19 = coronavirus disease 2019.

* Because of a ruling from Michigan’s supreme court, a 3-day lapse in Michigan’s statewide mask mandate occurred during October 2–4. The analyses did not consider this lapse. All other statewide mask mandates were continuous throughout the study period.