Water Safety
Water Safety
Water Standards
Water Regulations
For details on these specific acts and regulations please refer to the Canadian Food Inspection Agency (CFIA) - Acts and Regulations website
Manitoba Acts and Regulations include:
Water Sources
Water Contaminants
Bacteria |
Aeromonas, Campylobacter, Coliforms*, E. coli 0157:H7, Legionella, Salmonella, Shigella, Yersinia, Vibrio |
Viruses |
Enteroviruses, Hepatitis A, Noroviruses |
Protozoa (parasites) |
Amoeba, Cryptosporidium, Cyclospora, Giardia, Roundworms, Toxoplasma |
- pesticides
- mineral salts (ex: nitrates, copper, sulfates)
- heavy metals (ex: arsenic, lead, mercury, cadmium, silver)
- volatile organic compounds (ex: phenols)
- asbestos
- organic chemicals
- radionuclides (ex: uranium, radium, radon)
Maximum acceptable concentrations for chemical contaminants are established by Health Canada in the Guidelines for Canadian Drinking Quality-Summary Table (PDF 480 KB).
Physical Contaminants: Physical contaminants of water pose a low health risk to consumers but may affect the quality of water. Water may contain suspended particles of fine sand, clay and precipitated salts. This cloudiness is called turbidity and can interfere with effective disinfection and purification of water. Unpleasant taste or odours are likely caused by organic substances, such as: decaying vegetation, algae or organic chemicals containing carbon.
For more information on the maximum acceptable level for physical contaminants, see Guidelines for Canadian Drinking Water Quality-Summary Table (PDF 480 KB).
Water Safety Analysis
- Run water from taps or hoses for at least three minutes before collection in sterile bottles.
- Transport water samples promptly to the certified testing laboratory -- no more than 24 hours between sample collection and testing.
- Include water sampling procedures (ex: how to sample, how often, where to sample) in a written Standard Operating Procedure (SOP) (PDF 251 KB).
- Test water samples for microbial and chemical parameters.
- absolute number (ex: 250 organisms)
- cfu/100 milliliters (colony-forming units per 100 milliliters)
- numbers expressed by E where E means exponent to the power of 10 (ex: 2.5 E+02 converts to 2.5 X 10 X 10 which equals 250 organisms)
The maximum acceptable concentration for both coliforms and E. coli in water used in food production is zero per 100 ml, under the Guidelines for Canadian Drinking Water Quality.
When tests show positive results:
a) Food processors can accept the test result and take immediate corrective action. All products should be detained until laboratory analysis confirms the product is safe. If a product contaminated with possible pathogenic bacteria has been shipped, a recall of the product may be necessary. Immediately notify the appropriate local regulatory authority or the CFIA. Call 204-229-9896 within Manitoba.
b) Test the duplicate sample to confirm the results. However, the most practical response is to accept the initial result, rather than trying to prove that it was a false result.
Chemical testing
Water samples for chemical analysis should be collected at least once a year. Chemical test should include:
pH heavy metals pesticides residual chlorine water hardness (water with high mineral content) iron nitrates
For a complete list of current guidelines for chemical parameters visit the Guideline for Canadian Drinking Water Quality - Guidelines for chemical and physical parameters section.
Documentation
Keep records of microbial and chemical samples. These records can help monitor results, help processors decide if additional sampling/testing is required and are necessary for auditing.
Water Systems in a Food Facility
- Keep complete and updated plumbing diagrams of the food plant. Food processors need to know how fresh water is obtained and ensure that cross-contamination with sewage is avoided.
- Water lines should remain clean to ensure there is no risk of potential contamination within the food operation.
- Back-flow prevention devices can help to keep water clean. They prevent dirt or contaminated water from flowing towards a clean source.
- The facility’s water systems need to provide water at the required temperature and pressure for food processing, cleaning equipment and employee sanitary facilities within a food plant.
Aspects to consider in a water treatment program include:
trained personnel are responsible for the water treatment type of treatment to be performed chemicals/equipment required explicit directions to perform the treatment schedule for water treatment records of the treatment and results obtained
Water Treatment Options
A water treatment system should be selected based on the contaminants to be removed, amount of water to be treated, initial and ongoing costs of operation and maintenance. The treatment selected should purify water to the quality levels required for its intended use.
Some examples of water treatment options are:
chlorination hydrogen peroxide reverse osmosis filtration ultraviolet radiation ozonation
Water for Cleaning and Sanitation
References
Related Links
- Manitoba Environment and Climate Water System Resources
- Manitoba Health Fact Sheets on Testing and Disinfecting Well Water
For more information, email the Food Safety and Inspection Branch or call 204-795-8418 in Winnipeg.