Company lists · Data refreshed September 2026

Top 25 Activated sludge system contractors based in Canada

Name: Activated sludge system contractors based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 105 companies tracked

RevenueBase identified 105 activated sludge system contractors headquartered in Canada as of September 2026 and tracks 2,278 professional contacts across them, including 1,170 with verified work emails. Calgary is the largest hub.

This list covers activated sludge system contractors headquartered in Canada, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review

105Companies

2,278Contacts tracked

1,170Verified emails

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The 25 largest activated sludge system contractors based in Canada

Ranked by team size

Top 25 of 105 activated sludge system contractors based in Canada, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to activated sludge system contractors: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	OVIVO	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 30, 2026	501-1,000	829 contacts →
	Indirect evidence “Ovivo is a powerful global brand, uniting world-renowned trademarks and a highly specialized team of 700 water treatment experts operating across the globe.” Source: RevenueBase Database · checked Sep 30, 2026
2	Integrated Sustainability	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 30, 2026	51-200	115 contacts →
	Indirect evidence “Integrated Sustainability is a performance infrastructure group providing advisory, design-build-supply, and operational expertise in water and wastewater treatment, water and…” Source: RevenueBase Database · checked Sep 30, 2026
3	Clearford	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 30, 2026	51-200	86 contacts →
	Indirect evidence “Clearford delivers optimized smart treatment solutions for communities of all sizes, when and where you need them, high performance water and wastewater treatment plus all of the…” Source: RevenueBase Database · checked Sep 30, 2026
4	Bionest	Partial evidence	Shawinigan, QC, CanadaHQ checked Sep 30, 2026	51-200	80 contacts →
	Partial evidence “Spécialiste dans le développement et la commercialisation de systèmes avancés d'épuration des eaux usées, Bionest offre des systèmes dont les performances inégalées permettent de…” Source: RevenueBase Database · checked Sep 30, 2026
5	NEXOM	Indirect evidence	Winnipeg, MB, CanadaHQ checked Sep 30, 2026	51-200	68 contacts →
	Indirect evidence “The wastewater industry has seen how nutrients and energy costs expose the limits of existing solutions.” Source: RevenueBase Database · checked Sep 30, 2026
6	Bennett Construction Group	Indirect evidence	Millgrove, ON, CanadaHQ checked Sep 30, 2026	51-200	63 contacts →
	Indirect evidence “Bennett Construction Group has specialized in the construction of Water and Wastewater treatment facilities for over 40 years.” Source: RevenueBase Database · checked Sep 30, 2026
7	GS Construction Underground Infrastructure	Indirect evidence	Acheson, AB, CanadaHQ checked Sep 30, 2026	51-200	61 contacts →
	Indirect evidence “GS has prided itself on a reputation of quality work, continuous learning and a primary focus on employee safety.” Source: RevenueBase Database · checked Sep 30, 2026
8	AWC Water Solutions	Partial evidence	Langley, BC, CanadaHQ checked Sep 30, 2026	51-200	61 contacts →
	Partial evidence “AWC Water Solutions designs, manufactures, and integrates water and wastewater treatment systems for a variety of municipal and industrial applications.” Source: RevenueBase Database · checked Sep 30, 2026
9	Stormtec Water Management	Partial evidence	Delta, BC, CanadaHQ checked Sep 30, 2026	51-200	60 contacts →
	Partial evidence “Established in 2003, Stormtec is the water management solutions company specializing in providing temporary and permanent industrial water treatment systems for sediment…” Source: RevenueBase Database · checked Sep 30, 2026
10	Tritech Group LTD	Indirect evidence	Langley, BC, CanadaHQ checked Sep 30, 2026	51-200	56 contacts →
	Indirect evidence “Tritech is an industry leader in integrated design, project management, and construction services for water and wastewater infrastructure projects.” Source: RevenueBase Database · checked Sep 30, 2026
11	Filtrum Construction	Indirect evidence	Québec, QC, CanadaHQ checked Sep 30, 2026	51-200	49 contacts →
	Indirect evidence “As water and wastewater specialists, Filtrum Construction is a trusted partner to engineer and construct leading-edge, cost-effective solutions for industrial and municipal…” Source: RevenueBase Database · checked Sep 30, 2026
12	Napier-Reid LTD	Indirect evidence	Aurora, ON, CanadaHQ checked Sep 30, 2026	11-50	45 contacts →
	Indirect evidence “About Us Napier-Reid is a leading water and wastewater treatment solutions company with an established reputation for design innovation and manufacturing excellence.” Source: RevenueBase Database · checked Sep 30, 2026
13	Delco Water, A Division Of Delco Automation	Indirect evidence	Saskatoon, SK, CanadaHQ checked Sep 30, 2026	51-200	44 contacts →
	Indirect evidence “Delco Water, a division of Delco Automation Inc, is a premier water treatment solutions provider and equipment integrator.” Source: RevenueBase Database · checked Sep 30, 2026
14	H2flow	Indirect evidence	Vaughan, ON, CanadaHQ checked Sep 30, 2026	11-50	43 contacts →
	Indirect evidence “Water & Wastewater Treatment Equipment sales & service for industrial & municipal applications: grinders, screens, conveyors, SBRs, grit removal, aerators, diffusers, blowers…” Source: RevenueBase Database · checked Sep 30, 2026
15	Ovivo Filterboxx	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 30, 2026	51-200	41 contacts →
	Indirect evidence “Based in Alberta, Canada, FilterBoxx is a renowned leader in the design and supply of modular waterIntroPage and wastewater solutions for a wide array of industrial customers.” Source: RevenueBase Database · checked Sep 30, 2026
16	Mabarex	Indirect evidence	Saint-laurent, QC, CanadaHQ checked Sep 30, 2026	11-50	35 contacts →
	Indirect evidence “DESIGN / BUILT / OPERATE Mabarex is a water-treatment leader serving clients across Canada since 1983.” Source: RevenueBase Database · checked Sep 30, 2026
17	Continental Carbon Group	Indirect evidence	Stoney Creek, ON, CanadaHQ checked Sep 30, 2026	11-50	35 contacts →
	Indirect evidence “SERVICES, PRODUCTS AND EXPERTISE IN THE WATER TREATMENT INDUSTRY Continental Carbon Group offers a wide range of products, services and expertise in the water and wastewater…” Source: RevenueBase Database · checked Sep 30, 2026
18	Kontek Process Water Management	Indirect evidence	Burlington, ON, CanadaHQ checked Sep 30, 2026	11-50	34 contacts →
	Indirect evidence “Kontek Process Water Management is a well-established privately owned Canadian company with primary offices and manufacturing facilities located in Burlington, Ontario, Canada.” Source: RevenueBase Database · checked Sep 30, 2026
19	Waterloo Biofilter Systems INC	Indirect evidence	Guelph, ON, CanadaHQ checked Sep 30, 2026	11-50	32 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
20	Bishop Water	Indirect evidence	Arnprior, ON, CanadaHQ checked Sep 30, 2026	11-50	32 contacts →
	Indirect evidence “Bishop Water provides simple, reliable nutrient removal and solids management solutions that enable communities and industries to affordably solve water and wastewater challenges…” Source: RevenueBase Database · checked Sep 30, 2026
21	ADI Systems, An Evoqua Brand	Partial evidence	Fredericton, NB, CanadaHQ checked Sep 30, 2026	51-200	28 contacts →
	Partial evidence “ADI® Systems, an Evoqua brand, has been specializing in the design and construction of industrial wastewater treatment systems for over 35 years.” Source: RevenueBase Database · checked Sep 30, 2026
22	BI Pure Water Canada INC	Indirect evidence	Surrey, BC, CanadaHQ checked Sep 30, 2026	11-50	21 contacts →
	Indirect evidence “BI Pure Water’s pre-assembled compact water and wastewater treatment plants are renowned for their cost-effective and reliable performance.” Source: RevenueBase Database · checked Sep 30, 2026
23	Aslan Technologies INC	Indirect evidence	Burlington, ON, CanadaHQ checked Sep 30, 2026	11-50	19 contacts →
	Indirect evidence “Aslan Technologies is a design and manufacturing company COMMITTED TO THE PROVISION OF INNOVATIVE decentralized WATER AND ENERGY MANAGEMENT SOLUTIONS SINCE 1992.Aslan Technologies…” Source: RevenueBase Database · checked Sep 30, 2026
24	Baseline Constructors INC	Partial evidence	Waterloo, ON, CanadaHQ checked Sep 30, 2026	11-50	15 contacts →
	Partial evidence “Baseline Constructors Inc is a General Contractor in the water and wastewater industry based out of Waterloo, ON” Source: RevenueBase Database · checked Sep 30, 2026
25	Waterworks Technologies INC	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 30, 2026	51-200	11 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: activated sludge system contractors. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names activated sludge system contractors.
Partial evidence: Its own public description names part of activated sludge system contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name activated sludge system contractors. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 105 activated sludge system contractors based in Canada

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Activated sludge system contractors based in Canada at a glance

As of Sep 30, 2026

51.4%Verified-email coverage

21.7Average contacts per company

11-50Median size (employees)

9.5%Largest-city concentration · Calgary

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Email recency for this list is measured worldwide rather than for Canada, so it is reported there. Company counts and contact totals on this page are exact for Canada, over 105 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among activated sludge system contractors, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Canada whose own description of what they do matches “activated sludge system contractors”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names activated sludge system contractors), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among activated sludge system contractors, and records with no verified work email. Companies headquartered outside Canada are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 1,170 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 30, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names activated sludge system contractors, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many activated sludge system contractors are there based in Canada?

RevenueBase identified 105 activated sludge system contractors headquartered in Canada as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

OVIVO, headquartered in Montreal, tops this list with the largest team on record.

Which city has the most activated sludge system contractors?

Calgary leads with 10 headquartered companies, followed by Burlington (5) and Mississauga (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,170 verified decision-maker contacts tracked across these 105 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.