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City of Hamilton - Public Health Services

Safe Water - Small Drinking Water Systems

 A Small Drinking Water System can be a privately or publicly owned or operated drinking water system that provides drinking water to the public. If you own and/or operate a business or facility, as described below, that has its own drinking water system (a well or cistern), then you likely own and operate a Small Drinking Water System;
  • restaurant
  • seasonal trailer park/campground
  • hotel/motel/B&B 
  • churches
  • recreational facility
  • municipal parks
  • sports/leisure facility
  • private club or fraternal organization
  • any facility where the general public has access to a drinking fountain, shower or a washroom.

New Regulations under the Health Protection and Promotion Act require owners of Small Drinking Water Systems to provide consistently safe drinking water to their users.



The following fact sheets will provide you with information on keeping your drinking water safe:  

Regulations: Get to Know the Law (I)
Directives: Get to Know the Law (II)
Frequently Asked Questions
Brochure - An Inroduction to Operating a Small Drinking Water System(pdf)
Operator Training
Response to Adverse Events (pdf)
Sampling and Testing (pdf)
Source Water (pdf)
Treatment Options (pdf)


The following resources will provide you with information on keeping your drinking water safe:

Procedure for Corrective Action for Small Drinking Water Systems that are Not Currently Using Chlorine
Procedure for Disinfection of Drinking Water in Ontario


Small Drinking Water Systems related forms:

Laboratory Services Notification (LSN) form

Notice of Adverse Test Results and Issue Resolution form

Small Drinking Water System Operator Desigation form

Small Drinking Water System Notification form 

Contact Information


Safe Water Infoline: 905-546-2189 - this infoline is monitored by a Public Health Inspector. The public including owners and operators of small drinking water systems can use this phone number for general inquiries about drinking water.

Owners and operators of small drinking water systems regulated under Ontario Regulations 318/319 are required to report incidents of Adverse Water Quality to Hamilton Public Health Services. . To report an adverse drinking water quality incident please contact PHS as follows:

  • Regular hours (8:30 am to 4:30 pm) Tel: 905-546-2424 Ext. 7277
  • After hours, weekends and holidays: Tel: 905-546-3500 (Ask for On-call Environmental Public Health Inspector)

Last updated: July 15, 2013