Guidelines for Canadian Drinking Water Quality: Guideline Technical Document – Cyanobacterial Toxins

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Organization: Health Canada
Type: Guidelines

Date published: 2018-09-07

Related program

  • Water and Air Quality Bureau, Health Canada

From Health Canada


This guideline technical document provides the scientific information used to update the guideline for cyanobacterial toxins in drinking water. It reviews and assesses all identified health risks associated with cyanobacterial toxins in drinking water, taking into consideration new studies and approaches as well as the availability of appropriate treatment technology. Based on this review, the guideline for total microcystins in drinking water is a maximum acceptable concentration of 0.0015 mg/L (1.5 µg/L). This information is made available to provide Canadian jurisdictions (provinces, territories and federal departments) with the scientific basis they need to establish or update their requirements for cyanobacterial toxins in drinking water.

Who this document is for

  1. Regulatory agencies
  2. Academic community
  3. Health protection agencies
  4. Public drinking water utilities, such as drinking water treatment plants

In this guideline technical document

Part I. Overview and Application

Part II. Science and Technical Considerations

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Details and history

Published: September 7, 2018

Consulted: February - April, 2016 (see all consultations)

Part of topic(s): Guidelines for Canadian Drinking Water Quality

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