Septic, wells and lake water on Couchiching waterfront

Plenty of Couchiching waterfront is on city or township services. Much of it isn't. Outside Orillia's sewers and Severn's Westshore system, a shoreline property usually has its own water supply and its own septic system, both sitting a short distance from the lake they depend on. This page covers the shoreline-specific parts: drinking lake water, treating it, testing it, and how septic rules tighten near the water.

For the general guides, see rossmanteam.com's wells and water testing and septic inspections. This page doesn't repeat them.

Which Couchiching shorelines have municipal services?

Area	Water	Sewage
Orillia	City system, mostly drawn from Lake Couchiching	City sewer for most; private septic on the rural edges
Severn, Westshore	Township system, treated Couchiching water (about 1,179 connections)	Township wastewater plant serves the settlement area; confirm the lot
Severn, elsewhere	Private well or lake-drawn	Private septic
Ramara	Private well or lake-drawn	Private septic

Severn's own description is blunt: outside its serviced areas, "individual drinking water wells and septic systems are the responsibility of the homeowner."

How does drawing water from the lake work?

A lake-drawn system is usually an intake line run out into the lake, a pump (often in a small pumphouse), and a treatment train in the house. Even the township treats Couchiching water with coagulation, filtration, UV and chlorine before it goes to Westshore taps. A cottage system should be taken just as seriously.

The Province's guidance on treatment:

• UV kills bacteria and viruses, but needs a very fine pre-filter (about 5 microns), slow water flow and a clean lamp. It doesn't remove microbes embedded in dirt particles, including parasites, without filtration.
• Chlorination works on bacteria and many viruses, but can't be relied on to kill all parasites, and needs careful dosing and monitoring.
• Filtration needs regular maintenance and replacement. For surface-water-influenced sources, the Province says "effective filtration and treatment will be required."

What to ask about a lake-water system

1. What's in the treatment train: sediment filter, fine filter, UV, anything else?
2. When were the UV lamp and filters last changed? Is there a service record?
3. Where's the intake, and how deep? Does it freeze or draw air when the lake drops in fall?
4. Is it a year-round system or seasonal? Is the line heated or drained for winter?
5. Are there recent bacteriological test results, ideally from more than one season?

Intake lines sit on the lakebed. Where Parks Canada has jurisdiction, its in-water policies govern work on the bed, so ask before installing or relocating a line. See docks and shoreline permits.

How do you test drinking water on Couchiching?

Public Health Ontario tests private drinking water for E. coli and total coliform bacteria free of charge. In Orillia:

• Bottles: the Simcoe Muskoka District Health Unit office at 169 Front Street (pick-up only, weekdays), or the Public Health Ontario lab at 750 Memorial Avenue.
• Drop-off: the PHO lab at 750 Memorial Avenue (weekdays), or a health unit office that accepts samples, Monday to Thursday before 4:30 p.m. No Friday drop-offs at health unit offices.
• Timing: samples must be tested within 48 hours of collection, so drop them off the day you collect.
• Questions: Health Connection, 705-721-7520 or 1-877-721-7520.

Chemical testing isn't part of the free program; use a private licensed lab.

How often? The health unit recommends regular testing. The Province advises testing more often when quality varies and during events such as spring melt. For a lake-drawn system, that means at least at opening in spring, after heavy rain, and whenever the treatment system is serviced.

How close to the water can a septic system be?

Several layers apply.

Rule	Requirement
Building Code (2012/2017 text)	Treatment unit (tank) at least 15 m from a lake; leaching bed distribution piping at least 15 m from a lake.
Severn zoning	No leaching bed distribution pipes within 20 m of the high water mark (219.15 m for Couchiching) or in a floodway, unless the lot is entirely within 35 m of the water, there's no suitable location beyond 20 m, or it's a like-for-like replacement no closer to the water
Ramara zoning	No buildings or structures within 15 m of the high water mark, and hazard limits tied to the 100-year flood level plus 5 m
Orillia	City building department; most lots on sewer

The Building Code was updated in 2024, so confirm current clearances with the building department before designing a replacement. On tight waterfront lots, these setbacks are why septic replacements can be expensive or need a specialized system.

What septic program applies where?

• Orillia: every private system inspected every five years; lenders and buyers may ask for a septic compliance letter on sale.
• Ramara: mandatory five-year program within 100 m of the Lake Simcoe shoreline and watershed and near municipal wells and intakes, $30 a year on the tax bill. The page doesn't name Couchiching, so check the specific lot on the county GIS layer.
• Severn: discretionary program, including Lake Couchiching, suspended for five years on June 17, 2026; mandatory inspections continue in wellhead and intake protection zones.

What should buyers check?

1. Services confirmed in writing for the address.
2. Septic permit, as-built drawing, age, location and distance to the water.
3. A private septic inspection, including a pump-out.
4. Water source, treatment equipment and service records.
5. Your own bacteriological test before conditions come off.

How Jordan can help

Jordan can help you confirm the services on a Couchiching property, ask the right questions about lake-water systems and septic location, and build the inspections into your offer. Call 705-345-0797 or get in touch below.