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Small Drinking Water Systems (SDWS)

What is the Small Drinking Water System Regulation?

The Small Drinking Water Systems regulation O.Reg.319/08 is a regulation that requires owners of small well systems that serves water to the public to maintain and monitor their drinking water to ensure that drinking water served to the public is safe.

Here are some examples of small drinking water systems that are regulated under the Small Drinking Water System regulation:

  • Seasonal trailer parks, campgrounds or resorts with 6 or more connections
  • Restaurants on private water systems
  • Hotels, motels and bed and breakfast accommodations
  • Recreational and athletic facilities
  • Places of worship
  • Places where service clubs and fraternal organizations meet
  • Any place where the general public has access to a drinking water fountain or shower

Public Health Inspectors are here to help:

  • Small Drinking Water Systems are inspected by Public Health Inspectors from your local health unit.
  • Public Health inspectors conduct site-specific risk assessments on small drinking water systems in Leeds, Grenville and Lanark Counties. Based on the assessment, a directive is issued to an owner which includes requirements such as water testing, treatment and training. This reflects a customized approach for each small drinking water system depending on the level of risk, rather than “one-size-fits-all” requirements.

Fact Sheets and Guidance for Small Drinking Water System Operators


Training for Small Drinking Water System Operators

Licensed Laboratories


Laboratory Services Notification Form

The Laboratory Services Notification (LSN) form is to be used by small drinking water system owners/operators to notify the local public health unit in writing as to which licensed laboratories will test drinking water samples for their small drinking water systems.

Small Drinking Water System Identification Form

The Small Drinking Water System Identification form is to be used by owners of Small Drinking Water Systems to notify in writing the medical officer of health in the health unit where their system is located before supplying drinking water to users of the system following construction or alteration of the Small Drinking Water System or following a shut-down of the system that lasts longer than seven days.

Small Drinking Water System Seasonal Re-Opening Notice Form

Small Drinking Water System Seasonal Re-Opening Notice Form. Please provide completed form and results to the Health Unit a minimum of two weeks prior to the date you wish to open for the season.

Notice of Adverse Test Result and Issue Resolution Form

The Notice of Adverse Test Results and Issue Resolution form is to be used by licensed laboratories and owners/operators of Small Drinking Water Systems to report adverse water quality incidents (AWQI).