Skip Ribbon Commands
Skip to main content

Drinking Water Safety

Drinking water describes water that is safe to drink. You also need safe water for everyday activities like cooking, washing fruits and vegetables, doing dishes, and bathing. Drinking water can come from many different sources (a municipal water system, surface water, or a well) and each source of water must be properly treated to ensure it's safe. In Ontario, all public water systems follow Provincial regulations to make sure that water is safe to drink.

The Northwestern Health Unit helps to reduce and prevent water-borne illness (sickness caused from unsafe water) by:

Working with operators
The health unit works with the operators of local municipal water systems and the operators of small drinking water systems.

Boil water advisories and orders
When water is not safe to drink, the health unit works with municipalities to issue advisories and can issue orders to small drinking water systems that fall under the Health Protection and Promotion Act. The health unit provides information and guidelines for child care facilities, dental offices, health care institutions, premises that make ice, and small drinking water systems on how to operate safely during a boil water advisory or order.


Public education
Learn about private well water and surface water, and how to test your drinking water.

For more information please contact a Public Health Inspector during work hours at your local health unit office.

Learn more about:

Microsoft.SharePoint.Taxonomy.TermStoreOperationException: Failed to read from or write to database. Refresh and try again. If the problem persists, please contact the administrator. at Microsoft.SharePoint.Taxonomy.MetadataWebServiceApplicationProxy.<>c__DisplayClass2c.b__2b() at Microsoft.Office.Server.Security.SecurityContext.RunAsProcess(CodeToRunElevated secureCode) at Microsoft.SharePoint.Taxonomy.MetadataWebServiceApplicationProxy.<>c__DisplayClass2c.b__2a() at Microsoft.Office.Server.Utilities.MonitoredScopeWrapper.RunWithMonitoredScope(Action code) at Microsoft.SharePoint.Taxonomy.MetadataWebServiceApplicationProxy.RunOnChannel(CodeToRun codeToRun, Double operationTimeoutFactor) at Microsoft.SharePoint.Taxonomy.Internal.TaxonomyProxyAccess.SearchTermByLabel(Guid rawPartitionId, Nullable`1 termSetId, Nullable`1 anchorId, String label, Nullable`1 lcid, Boolean defaultLabelOnly, Boolean includeIdPath, StringMatchOption stringMatchOption, Int32 resultCollectionSize, Boolean getFullPath, Nullable`1 defaultLcid, Boolean isOptimized, Boolean getAllLocalTermSets, Nullable`1 siteGroupId) at Microsoft.SharePoint.Taxonomy.Internal.DataAccessManager.SearchTermByLabel(Nullable`1 termSetId, Nullable`1 anchorId, String label, Nullable`1 lcid, Boolean defaultLabelOnly, Boolean includeIdPath, StringMatchOption stringMatchOption, Int32 resultCollectionSize, Boolean getFullPath, Nullable`1 defaultLcid, List`1& sortedTermIds) at Microsoft.SharePoint.Taxonomy.Internal.SharedItemManager.SearchTermByLabel(Nullable`1 termSetId, Nullable`1 anchorId, String label, Nullable`1 lcid, Boolean defaultLabelOnly, Boolean includeIdPath, StringMatchOption stringMatchOption, Int32 resultCollectionSize, Boolean getFullPath, Nullable`1 defaultLcid, Boolean trimUnavailable, Boolean trimDeprecated, Boolean excludeKeyword) at Microsoft.SharePoint.Taxonomy.TermSet.SearchTermByLabel(String termLabel, Nullable`1 lcid, Boolean defaultLabelOnly, StringMatchOption stringMatchOption, Int32 resultCollectionSize, Boolean trimUnavailable) at Microsoft.SharePoint.Taxonomy.TermSet.GetTerms(String termLabel, Boolean trimUnavailable) at NWHU.NWHU.Parts.PublicHealthQuestion.PublicHealthQuestionUserControl.DoSPQuery()