Drinking Water Quality and Supply

From source to sink

Where Trois-Rivieres water comes from

A plain-language tour of the lakes, rivers, or wells that feed Trois-Rivieres, the plants that clean the water, and how it reaches kitchen taps. Lab grades for hardness, lead, and pH live on the water quality page.

On the map

Where Trois-Rivieres water lives

Source waters and treatment plants pinned from published utility names. Open a pin below for the full OpenStreetMap view.

Map showing drinking-water locations for Trois-Rivieres

Map data © OpenStreetMap contributors. Pins are approximate for orientation, not legal survey points.

Deep dive for households

Trois-Rivieres drinking water starts as a mix of surface water and wells. The named sources on the utility record are Rivière Saint-Maurice, Municipal groundwater wells (multiple wellfields). That is the water that eventually reaches kitchen taps after treatment, not a separate bottled brand.

Water is cleaned at Usine de filtration de Trois-Rivières before it enters city pipes. Surface-water plant on Rivière Saint-Maurice; coagulation/flocculation, filtration, UV, and chlorine/chloramine residual; serves roughly 60% of customers (city cites ~70% surface / 30% groundwater overall supply mix).

After treatment, water moves through pumps, storage, and underground mains to reach streets and buildings. Besides the Saint-Maurice filtration plant, several groundwater production sectors (including Cap-de-la-Madeleine, Saint-Louis-de-France, Sainte-Marthe-du-Cap, and parts of Trois-Rivières-Ouest) feed local reservoirs and a partly interconnected aqueduct network.

One detail that makes Trois-Rivieres water feel local: Unlike many St. Lawrence cities, Trois-Rivières does not use the St. Lawrence as its municipal drinking-water source; groundwater remains a major share of supply. Lab grades for hardness, lead, and pH sit on the city water quality page; this overview is about the route the water travels.

Where it starts

Mixed surface and groundwater

A blend of surface water and wells, depending on the neighbourhood or season.

Research confidence: high

Named source waters

  • Rivière Saint-Maurice
  • Municipal groundwater wells (multiple wellfields)

Treatment plants

These are the buildings that filter and disinfect water before it enters city pipes.

  • Usine de filtration de Trois-Rivières

    Surface-water plant on Rivière Saint-Maurice; coagulation/flocculation, filtration, UV, and chlorine/chloramine residual; serves roughly 60% of customers (city cites ~70% surface / 30% groundwater overall supply mix).

How it reaches your street

Besides the Saint-Maurice filtration plant, several groundwater production sectors (including Cap-de-la-Madeleine, Saint-Louis-de-France, Sainte-Marthe-du-Cap, and parts of Trois-Rivières-Ouest) feed local reservoirs and a partly interconnected aqueduct network.

Trois-Rivieres water quality grades · All city rankings

Source · ECCC / municipal open data (seed). Last updated 2026-07-22. Refreshed on the site's automated schedule.