Company lists · Data refreshed September 2026

Top 25 Air quality engineering firms based in Canada

Name: Air quality engineering firms based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 308 companies tracked

RevenueBase identified 308 air quality engineering firms headquartered in Canada as of September 2026 and tracks 7,923 professional contacts across them, including 3,734 with verified work emails. Calgary is the largest hub.

This list covers air quality engineering firms 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

308Companies

7,923Contacts tracked

3,734Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest air quality engineering firms based in Canada

Ranked by team size

Top 25 of 308 air quality engineering firms 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 air quality engineering firms: 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	Golder	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 30, 2026	5,001-10,000	3,167 contacts →
	Indirect evidence “Golder was acquired by WSP.” Source: RevenueBase Database · checked Sep 30, 2026
2	Pinchin In Canada	Indirect evidence	Mississauga, ON, CanadaHQ checked Sep 30, 2026	1,001-5,000	895 contacts →
	Indirect evidence “Pinchin Ltd.” Source: RevenueBase Database · checked Sep 30, 2026
3	Blumetric	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 30, 2026	201-500	210 contacts →
	Indirect evidence “Since 1976, BluMetric has been delivering innovative and sustainable solutions to complex environmental challenges.” Source: RevenueBase Database · checked Sep 30, 2026
4	PGL Environmental Consultants	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 30, 2026	51-200	186 contacts →
	Indirect evidence “PGL Environmental Consultants consistently provides clients with a high level of support and confidence in our environmental management and planning decisions by combining…” Source: RevenueBase Database · checked Sep 30, 2026
5	Keystone Environmental	Indirect evidence	Burnaby, BC, CanadaHQ checked Sep 30, 2026	51-200	158 contacts →
	Indirect evidence “Keystone Environmental is a proudly Canadian (owned and operated) full service environmental consultancy helping businesses meet their environmental goals and objectives.” Source: RevenueBase Database · checked Sep 30, 2026
6	LE Groupe Gesfor Poirier Pinchin INC	Indirect evidence	Montréal, QC, CanadaHQ checked Sep 30, 2026	51-200	141 contacts →
	Indirect evidence “LE GROUPE GESFOR POIRIER, PINCHIN INC.” Source: RevenueBase Database · checked Sep 30, 2026
7	DS Consultants LTD	Indirect evidence	Vaughan, ON, CanadaHQ checked Sep 30, 2026	51-200	126 contacts →
	Indirect evidence “DS Consultants, A BluMetric Company, is a publicly traded company in good standing with the Professional Engineers of Ontario (PEO) and the Association of Professional…” Source: RevenueBase Database · checked Sep 30, 2026
8	BGE Indoor AIR Quality Solutions	Strong evidence	Edmonton, AB, CanadaHQ checked Sep 30, 2026	51-200	108 contacts →
	Strong evidence “AT BGE, WE BELIEVE CLEAN AIR MATTERS BGE Indoor Air Quality Solutions is committed to keeping people healthy in their workplaces, buildings, and communities.” Source: RevenueBase Database · checked Sep 30, 2026
9	NVIRA	Partial evidence	Montréal, QC, CanadaHQ checked Sep 30, 2026	51-200	106 contacts →
	Partial evidence “Since 2009, Nvira has established itself as a multidisciplinary environmental engineering consulting firm committed to delivering a distinctive client experience, providing…” Source: RevenueBase Database · checked Sep 30, 2026
10	Associated Environmental Consultants	Indirect evidence	Vernon, BC, CanadaHQ checked Sep 30, 2026	501-1,000	105 contacts →
	Indirect evidence “Associated Environmental Consultants are experts in environmental science and management with a passion for our work, our communities, and our environment.” Source: RevenueBase Database · checked Sep 30, 2026
11	Paracel Laboratories LTD	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 30, 2026	51-200	100 contacts →
	Indirect evidence “Paracel Laboratories Ltd.(Paracel) is one of the oldest, privately owned and operated environmental testing companies in Canada.” Source: RevenueBase Database · checked Sep 30, 2026
12	North Shore Environmental Consultants INC	Indirect evidence	Sherwood Park, AB, CanadaHQ checked Sep 30, 2026	51-200	89 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
13	Modern Purair	Strong evidence	Kelowna, BC, CanadaHQ checked Sep 30, 2026	11-50	83 contacts →
	Strong evidence “Modern PURAIR® is your full-service Indoor Air Quality company.” Source: RevenueBase Database · checked Sep 30, 2026
14	ECOH	Indirect evidence	Mississauga, ON, CanadaHQ checked Sep 30, 2026	51-200	78 contacts →
	Indirect evidence “ECOH is a highly respected Canadian environmental, health and safety consulting company specializing in environmental management, hazardous materials, and occupational hygiene and…” Source: RevenueBase Database · checked Sep 30, 2026
15	AVIZO	Indirect evidence	Sherbrooke, QC, CanadaHQ checked Sep 30, 2026	51-200	66 contacts →
	Indirect evidence “Avizo est une firme de consultants spécialisés en environnement et en génie civil ayant plus de 30 ans d’expérience.” Source: RevenueBase Database · checked Sep 30, 2026
16	Active Earth	Indirect evidence	Burnaby, BC, CanadaHQ checked Sep 30, 2026	51-200	65 contacts →
	Indirect evidence “Active Earth is an industry leading environmental consulting firm that was founded in 2007, specializing in Site Assessment and Remediation, Soil Testing and Disposal Management…” Source: RevenueBase Database · checked Sep 30, 2026
17	Pesca Environment	Indirect evidence	Carleton-sur-mer, QC, CanadaHQ checked Sep 30, 2026	51-200	60 contacts →
	Indirect evidence “PESCA Environment assists you in the realization of your projects for more than 30 years.” Source: RevenueBase Database · checked Sep 30, 2026
18	Safetech Environmental Limited	Indirect evidence	Mississauga, ON, CanadaHQ checked Sep 30, 2026	51-200	55 contacts →
	Indirect evidence “Safetech Environmental Limited (Safetech) is a proudly Canadian environmental consulting firm with a national reach.” Source: RevenueBase Database · checked Sep 30, 2026
19	Envirochem Services INC	Indirect evidence	North Vancouver, BC, CanadaHQ checked Sep 30, 2026	11-50	46 contacts →
	Indirect evidence “We are your trusted environmental advisor since 1984.” Source: RevenueBase Database · checked Sep 30, 2026
20	Laforge Environnement INC	Indirect evidence	Varennes, QC, CanadaHQ checked Sep 30, 2026	11-50	46 contacts →
	Indirect evidence “Terrain contaminé, déversement de pétrole ou d’autres matières dangereuses, évaluation de site, prévention des risques et formation en environnement : quel que soit votre enjeu…” Source: RevenueBase Database · checked Sep 30, 2026
21	Nichols Environmental Engineering	Partial evidence	Edmonton, AB, CanadaHQ checked Sep 30, 2026	51-200	44 contacts →
	Partial evidence “We are an environmental and engineering consulting firm, providing strategic solutions to meet your unique business needs.” Source: RevenueBase Database · checked Sep 30, 2026
22	ORTAM	Indirect evidence	Montréal, QC, CanadaHQ checked Sep 30, 2026	11-50	43 contacts →
	Indirect evidence “ENVIRONNEMENT (ORTAM-ENVIRO) Vérification de conformité selon la réglementation en vigueur Évaluations environnementales (phase I) Caractérisations environnementales (phases II et…” Source: RevenueBase Database · checked Sep 30, 2026
23	GCL Environmental LTD	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 30, 2026	11-50	42 contacts →
	Indirect evidence “GCL Environmental Ltd.(GCL) is a results-driven environmental consulting firm.” Source: RevenueBase Database · checked Sep 30, 2026
24	Soil-Mat Engineers & Consultants LTD	Indirect evidence	Hamilton, ON, CanadaHQ checked Sep 30, 2026	11-50	41 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
25	AET Group INC	Indirect evidence	Kitchener, ON, CanadaHQ checked Sep 30, 2026	11-50	39 contacts →
	Indirect evidence “AET Group is an environmental consultancy firm committed to our ecological, financial and social responsibilities, working together collaboratively to find innovative solutions…” 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: air quality engineering firms. 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 air quality engineering firms.
Partial evidence: Its own public description names part of air quality engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name air quality engineering firms. 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 308 air quality engineering firms based in Canada

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 3,734 reachable decision-makers.

Free signup · no credit card

View the full list →

Air quality engineering firms based in Canada at a glance

As of Sep 30, 2026

47.1%Verified-email coverage

25.7Average contacts per company

1-10Median size (employees)

12.7%Largest-city concentration · Calgary

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

166

11-50

111

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 308 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 air quality engineering firms, 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 “air quality engineering firms”. 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 air quality engineering firms), 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 air quality engineering firms, 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, 3,734 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.

Air quality engineering firms by metro

Air quality engineering firms in Calgary39

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 air quality engineering firms, 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 air quality engineering firms are there based in Canada?

RevenueBase identified 308 air quality engineering firms 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?

Golder, headquartered in Vancouver, tops this list with the largest team on record.

Which city has the most air quality engineering firms?

Calgary leads with 39 headquartered companies, followed by Montreal (22) and Edmonton (19).

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 3,734 verified decision-maker contacts tracked across these 308 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.

Ready to reach these companies? Verified emails and direct dials for all 308 air quality engineering firms based in Canada. Start with a free account, no credit card.

Download this list →

Related lists

Air quality engineering firms by geography

Browse the directory

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.