Contaminants and Hazards


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

Printer Friendly, PDF & Email

Communicating the Risk of Infectious Diseases in a Changing Climate

A changing climate brings the threat of emerging, new infectious diseases and the resurgence of old infectious outbreaks. To ensure that public health professionals and policy makers receive timely…
View Full Article

Cyanobacteria in Freshwater

What are cyanobacteria? Are cyanoblooms preventable? Who is at risk and how does exposure occur? Is there testing for cyanotoxins?This NCCEH document provides a brief outline of these key questions…
View Full Article

Cyanobacteria in Freshwater

Cyanobacteria, commonly known as blue-green algae, are naturally occurring microscopic organisms found in fresh, brackish, or marine water that can release cyanotoxins into freshwater systems. These…
View Full Article

Drinking water guidelines and governance

The provision of safe drinking water across Canada is a responsibility shared across many agencies. At the federal level, Health Canada sets Drinking Water Guidelines for contaminants in drinking…
View Full Article

Growing at Home: Health and Safety Concerns for Personal Cannabis Cultivation

Personal cultivation as described by the proposed Cannabis Act (2017) will permit adults to cultivate up to four cannabis plants per household. This provision is intended to both promote equity by…
View Full Article

Health Effects from Mould Exposure in Indoor Environments - revised

Moulds are naturally occurring and widespread in the environment; therefore, it is not possible to eliminate exposure. Sufficient evidence exists to conclude that exposure to mould in indoor…
View Full Article

Irrigating Food Crops with Water Containing Cyanobacteria Blooms

Primary inquiry: Small horticulture growers have been watering their crops with surface water containing a cyanobacterial bloom, before selling their crops at local markets.Can irrigation of food…
View Full Article

Marine Shellfish Poisoning

Marine shellfish poisoning refers to illnesses in humans caused by consumption of marine bivalve shellfish (e.g., clams, mussels, oysters, scallops, cockles) that contain biotoxins (e.g., domoic acid…
View Full Article

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…
View Full Article

Mould Assessment Recommendations - revised

Excessive dampness and mould growth on building material surfaces and contents can pose health risks and should not be tolerated in indoor environments. A mould assessment determines if mould is…
View Full Article

Mould Remediation Recommendations - revised

Excessive dampness and mould growth on building material surfaces and contents can pose health risks and should not be tolerated in indoor environments. The main goal of remediation is to reduce the…
View Full Article

Mould: Health Effects, Exposure Assessment and Remediation

NCCEH Mould Investigation Toolkit

Public Health Inspectors (PHIs) and Environmental Health Officers (EHOs) across Canada have different responsibilities, policies, and guidelines when it comes to investigating public inquiries about…
View Full Article

Paralytic Shellfish Poisoning

Trigger for InvestigationOn June 18, 2010 a commercial harvester advised an inspection specialist at CFIA of four cases of suspect PSP-related illness that occurred June 17, 2010. CFIA began an…
View Full Article

When can Point-of-Use Water Filters be used for Removal of Protozoa?

While boiling water is an effective way to kill most microbial pathogens, research performed in the United Kingdom has shown that people do not necessarily comply with boil water advisories.…
View Full Article