Contaminants and Hazards


Identifying hazards posed by infectious diseases, chemicals, radiation, and noise, in homes and personal service establishments.

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Building Shutdown and Re-opening during the COVID-19 Pandemic

[Last Updated: Feb 11, 2021] During the ongoing COVID-19 pandemic, it may be necessary to periodically close public buildings and facilities, followed by re-opening when safe again. Periods of low…
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COVID-19 and outdoor safety: Considerations for use of outdoor recreational spaces

[NOTE:a printer friendly version of this document is attached at the bottom] Introduction Outdoor recreational spaces make important contributions to social well-being as well as physical and…
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COVID-19 and use of disinfectants and sanitizers in food premises

This blog is based on the NCCEH guidance document Disinfectants and Sanitizers for Use on Food Contact Surfaces to reflect recent developments due to COVID-19. SARS-CoV-2 is the coronavirus…
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COVID-19 and Wildfire Smoke: A Potentially Bad Combination

Exposure to air pollution can irritate the lungs, cause inflammation, and alter immune function, making it more difficult to fight respiratory infections such as COVID-19. Wildfire smoke is a complex…
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COVID-19 Precautions for Multi-unit Residential Buildings

The transmission of COVID-19, which occurs primarily through close contact with an infected person, has made it necessary for large proportions of the world’s population to self-isolate in their…
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COVID-19 Precautions for Multi-unit Residential Buildings

Multi-unit residential buildings bring together tens to hundreds of people within the same building envelope and in contact with many of the same surfaces. Although we know that COVID-19 is primarily…
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Environmental Health Resources for the COVID-19 Pandemic

The transmission of SARS-CoV-2, the virus that causes COVID-19, occurs primarily via direct contact with or respiratory droplets from an infected person. However, there is evidence to suggest that…
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Masking during the COVID-19 pandemic

*/ /*-->*/ /*-->*/ [Updated: Oct 21, 2020] Introduction Extensive debate over when, where, and what types of masks should be worn, and by whom, has persisted during the COVID-19 pandemic with…
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Physical barriers for COVID-19 infection prevention and control in commercial settings

Maintaining a safe physical distance will be essential to virtually all social and economic activities carried out during the COVID-19 pandemic. However, there are many instances or activities during…
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Reducing COVID-19 Transmission Through Cleaning and Disinfecting Household Surfaces

Background The primary mode of human-to-human transmission for SARS-CoV-2, the virus responsible for coronavirus disease (COVID-19), is via direct contact with an infected person and their…
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Summer is coming: Wildfire smoke + COVID-19

It is meant as an ominous threat when characters in the popular Game of Thrones series utter “winter is coming”, and I feel the same way about the summer of 2020. The catastrophic wildfire seasons of…
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The Basics of SARS-CoV-2 Transmission

(Previously An Introduction to SARS-CoV-2) [Last Updated March 21, 2021] The emergence of a novel coronavirus in late 2019, identified as SARS-CoV-2, has resulted in a global pandemic accompanied…
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Using Shared Laundry Facilities During the COVID-19 Pandemic

Although COVID-19 is primarily spread by direct contact with an infected person or their respiratory droplets, it may also be possible to transmit the virus by touching a contaminated surface, and…
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When hand washing is not handy: Cautions for hand sanitizer use

Washing hands with soap and water for at least 20 seconds is the most effective strategy for removing the COVID-19 virus from hands. In some situations, hand sanitizers can be used as a substitute if…
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