Water Canada’s Top 50 Canadian Water Projects

Welcome to Water Canada’s Top 50 Canadian Water Projects, where we highlight the country’s most ambitious and innovative initiatives improving how we deliver drinking water, treat wastewater, and manage stormwater.

From large-scale infrastructure to cutting-edge technology, these projects are redefining how Canada protects and manages its water resources — ensuring safe, reliable, and sustainable water systems for generations to come.

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Previous Years Rankings:

Top 50 Water Projects 2025

Rank

Project

Amount

1

Iona Island Wastewater Treatment Plant Projects

$10,000,000,000

2

Lake Diefenbaker Irrigation Projects

$4,000,000,000

3

North Shore Wastewater Treatment Plant Program

$3,860,000,000

4

Don River and Central Waterfront & Connected Projects

$3,000,000,000

5

North End Sewage Treatment Upgrades

$2,340,000,000

6

Northwest Langley Wastewater Treatment Plant

$2,300,000,000

7

Annacis Island Wastewater Treatment Plant Expansion

$2,000,000,000

8

Coquitlam Water Main Project

$1,660,000,000

9

Port Lands Flood Protection and Enabling Infrastructure

$1,420,000,000

10

MD of Acadia and Special Areas Irrigation Project

$1,300,000,000

11

Springbank Off-Stream Reservoir

$744,000,000

12

Bonnybrook Wastewater Treatment Plant D Expansion

$655,000,000

13

Stanley Park Water Supply Tunnel

$495,000,000

14

Annacis Water Supply Tunnel

$488,000,000

15

Second Narrows Water Supply Tunnel

$468,600,000

16

Fairbank Silverthorn Storm Trunk Sewer System

$400,000,000

17

Jean R. Marcotte Wastewater Treatment Plant

$360,000,000

18

Buffalo Pound WTP Renewal Project

$325,600,000

19

Collingwood, Ont. Water Treatment Plant Expansion

$270,000,000

20

Barrie Wastewater Treatment Facility

$261,000,000

21

Portage la Prairie Pollution Control Facility

$250,000,000

22

Whitby Water Supply Plant Expansion

$200,000,000

23

City of Regina Water Expansion Project

$167,000,000

24

Northeast Vaughan Water and Wastewater

$145,000,000

25

Niagara Region – Welland LLPS and WTP

$140,000,000

26

G.E. Booth Water Resource Recovery Facility

$130,000,000

27

Curve Lake First Nation, Water Project

$120,000,000

28

French Creek Pollution Control Centre Expansion and Odour Control Upgrades

$110,000,000

29

Red-Seine-Rat (RSR) WWTP

$110,000,000

30

ARROW Utilities Wastewater Treatment Plant

$90,300,000

31

Halton Region – Burloak Pump Station and Feedermains

$89,800,000

32

Abbotsford Drinking Water Resilience Project

$84,400,000

33

Winkler WWTP

$73,000,000

34

Chippewas of Nawash FN New Water Treatment Plant and Distribution Upgrade Project

$63,000,000

35

Queensway East Cawthra Trunk Sewer

$60,000,000

36

Biigtigong Nishnaabeg First Nation New WWTP

$58,000,000

37

Wabassee Creek Watershed

$56,200,000

38

Nanaimo Midtown Water Main

$55,000,000

39

Beaudet Réservoir, Victoriaville, PQ

$50,000,000

40

Capilano Water Supply Infrastructure

$50,000,000

41

Newcastle Water Supply Plant

$50,000,000

42

Oneida Nation of the Thames Water Supply System Project

$43,000,000

43

Mission Hill Water Treatment Plant Filtration Upgrade

$40,000,000

44

North Toronto Treatment Plant Process Upgrades

$25,700,000

45

Kitchener WWTP

$25,500,000

46

Bradford Water Pollution Control Plant Upgrades

$25,000,000

47

Williams Lake Water Treatment Plant

$24,300,000

48

Inverness Wastewater Treatment Facility Replacement & Linear Renewal

$24,000,000

49

Orangeville Water Pollution Control Plant Rehabilitation

$24,000,000

50

Rehabilitation of Lindsay Water Treatment Plant and Watermains

$18,000,000

Key Players

Key Players’ recognize the organizations whose work, knowledge, and expertise go into constructing and delivering the significant projects that make our annual list.

Key Player Directory

Platinum (12+ Projects)

Gold (9-11 Projects)

Silver (6-8 Projects)

Bronze (3-5 Projects)