Table 1.
Date of some COVID-19 mitigation-related executive orders by state and the District.
Note: Each government involves a series of executive orders and policies, a subset of which are listed here. Other policies that affect air pollution such as guidance from local governments and corporations' work-from-home orders, etc. are not included but also likely impacted levels of air pollution.
| State | Date of executive orders |
|---|---|
| California | March 4, 2020: State of emergency declared March 12, 2020: Further respond to COVID-19 pandemic March 19, 2020: Stay at home order |
| Connecticut | March 10, 2020: State of emergency declared March 12, 2020: Prohibition of large gatherings, limits on nursing home visitors, waiver of 180-day school year etc. March 15, 2020: Canceled classes in public schools March 23, 2020: Restrictions on workplaces for non-essential business, stay at home |
| Florida | March 9, 2020: State of emergency declared April 3, 2020: Stay at home order |
| Maryland | March 5, 2020: State of emergency declared |
| March 12, 2020: Prohibiting large gatherings and events and closing senior centers | |
| March 30, 2020: Stay at home order | |
| Massachusetts | March 10, 2020: State of emergency declared |
| March 13, 2020: Prohibiting gatherings of more than 250 people | |
| March 15, 2020: Closure of all public and private schools | |
| March 24, 2020: Closing nonessential business and organizations, stay at home | |
| New Jersey | March 9, 2020: State of emergency declared March 16, 2020: Limits on gatherings of 50 or more; closure of all schools, closure of racetracks, casinos; restaurant restrictions March 21, 2020: Stay at home order |
| New York | March 7, 2020: State of emergency declared March 18, 2020: Closure of all schools March 22, 2020: Closure of nonessential business and bans of gatherings of any size, stay at home |
| Pennsylvania | March 6, 2020: State of emergency declared April 1, 2020: Statewide stay at home order |
| Texas | March 13, 2020: State of emergency declared April 2, 2020: Stay at home order |
| Washington state | February 29, 2020: State of emergency declared March 13, 2020: School closure March 23, 2020: Stay at home order |
| Washington D.C. | March 11, 2020: State of emergency declared March 24, 2020: Closure of non-essential businesses and prohibition on large gatherings April 1, 2020: Stay at home order |
Source: The Council of State Governments. State executive orders. https://web.csg.org/covid19/executive-orders/