Company lists · Data refreshed September 2026

Top 25 Water consulting firms based in Australia

Name: Water consulting firms based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 457 companies tracked

RevenueBase identified 457 water consulting firms headquartered in Australia as of September 2026 and tracks 26,272 professional contacts across them, including 12,577 with verified work emails. Sydney is the largest hub.

This list covers water consulting firms headquartered in Australia, 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 21, 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 21, 2026 86% judged on-target in blind review

457Companies

26,272Contacts tracked

12,577Verified emails

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The 25 largest water consulting firms based in Australia

Ranked by team size

Top 25 of 457 water consulting firms based in Australia, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to water consulting 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	GHD	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	10001+	14,572 contacts →
	Partial evidence “We are committed to addressing the world’s biggest challenges in the areas of water, energy and communities.” Source: RevenueBase Database · checked Sep 21, 2026
2	Veolia Australia & NEW Zealand	Partial evidence	Pyrmont, AustraliaHQ checked Sep 21, 2026	5,001-10,000	2,476 contacts →
	Partial evidence “Veolia Australia and New Zealand is a leading provider of environmental solutions across water and wastewater services, industrial cleaning, waste management and resource recovery…” Source: RevenueBase Database · checked Sep 21, 2026
3	Cardno	Indirect evidence	Fortitude Valley, AustraliaHQ checked Sep 21, 2026	1,001-5,000	985 contacts →
	Indirect evidence “Cardno is now officially Stantec.” Source: RevenueBase Database · checked Sep 21, 2026
4	FYFE	Indirect evidence	Adelaide, AustraliaHQ checked Sep 21, 2026	501-1,000	468 contacts →
	Indirect evidence “Fyfe is an Australian professional services firm that delivers value through integrated engineering, environmental, planning and surveying services.” Source: RevenueBase Database · checked Sep 21, 2026
5	GPA Engineering	Indirect evidence	Unley, AustraliaHQ checked Sep 21, 2026	201-500	346 contacts →
	Indirect evidence “A highly experienced, multidisciplinary engineering and management firm, GPA has consulted and provided engineering, procurement and construction management (EPCM) services, since…” Source: RevenueBase Database · checked Sep 21, 2026
6	Entura	Strong evidence	Hobart, AustraliaHQ checked Sep 21, 2026	201-500	271 contacts →
	Strong evidence “Entura is one of the world’s most experienced specialist power and water consulting firms.” Source: RevenueBase Database · checked Sep 21, 2026
7	Enviropacific	Indirect evidence	Macquarie Park, AustraliaHQ checked Sep 21, 2026	201-500	260 contacts →
	Indirect evidence “Enviropacific is committed to working towards creating safer environments and sustainable communities.” Source: RevenueBase Database · checked Sep 21, 2026
8	Hydrochem	Partial evidence	Braeside, AustraliaHQ checked Sep 21, 2026	201-500	255 contacts →
	Partial evidence “HydroChem is one of Australia’s leading companies providing high quality water treatment services.” Source: RevenueBase Database · checked Sep 21, 2026
9	Tonkin	Indirect evidence	Adelaide, AustraliaHQ checked Sep 21, 2026	201-500	237 contacts →
	Indirect evidence “Tonkin is a leading provider of engineering, environmental and consultancy services to private and public organisations.” Source: RevenueBase Database · checked Sep 21, 2026
10	ATC Williams	Strong evidence	Mordialloc, AustraliaHQ checked Sep 21, 2026	201-500	222 contacts →
	Strong evidence “ATC Williams is a consulting engineering company specialising in providing custom solutions for tailings, water, waste, and resource recovery projects.” Source: RevenueBase Database · checked Sep 21, 2026
11	Trility	Partial evidence	Adelaide, AustraliaHQ checked Sep 21, 2026	201-500	217 contacts →
	Partial evidence “Company Overview: TRILITY is an established industry leader, dedicated in the delivery of water, wastewater, reuse and bio-solids solutions across Australia and New Zealand’s…” Source: RevenueBase Database · checked Sep 21, 2026
12	Engeny	Indirect evidence	Brisbane, AustraliaHQ checked Sep 21, 2026	201-500	216 contacts →
	Indirect evidence “Now a part of the Egis Group, Engeny provides a wide range of specialist engineering and environmental consultancy services across disciplines.” Source: RevenueBase Database · checked Sep 21, 2026
13	Aquatec	Partial evidence	Shepparton, AustraliaHQ checked Sep 21, 2026	51-200	177 contacts →
	Partial evidence “Aquatec partners with Government, business and residential clients to deliver water, wastewater and odour control solutions for the long-term.” Source: RevenueBase Database · checked Sep 21, 2026
14	TDG Environmental	Indirect evidence	Victoria, AustraliaHQ checked Sep 21, 2026	501-1,000	176 contacts →
	Indirect evidence “TDG environmental is a proudly Australian-owned company operating throughout Australia and New Zealand.” Source: RevenueBase Database · checked Sep 21, 2026
15	Premise	Indirect evidence	Brisbane City, AustraliaHQ checked Sep 21, 2026	51-200	151 contacts →
	Indirect evidence “Premise is now part of Amey and operates as Amey Australia.” Source: RevenueBase Database · checked Sep 21, 2026
16	Atlan Stormwater	Partial evidence	Sydney Olympic Park, AustraliaHQ checked Sep 21, 2026	201-500	147 contacts →
	Partial evidence “At Atlan Stormwater, we draw on more than 45 years’ experience in the design, testing and manufacture of water treatment systems that are utilised in over 45 countries.” Source: RevenueBase Database · checked Sep 21, 2026
17	Allied Pumps	Partial evidence	Canning Vale, AustraliaHQ checked Sep 21, 2026	51-200	142 contacts →
	Partial evidence “With over 30 years specialising and innovation in purpose-built and complete water package pumping and treatment solutions locally, nationally and internationally, it’s our vision…” Source: RevenueBase Database · checked Sep 21, 2026
18	Guidera O'connor	Partial evidence	Thebarton, AustraliaHQ checked Sep 21, 2026	51-200	137 contacts →
	Partial evidence “Guidera O'Connor (GO) is an Australian privately owned company operating only within the Water Industry and specialising in the delivery of water/wastewater treatment and pumping…” Source: RevenueBase Database · checked Sep 21, 2026
19	MONDO	Indirect evidence	Southbank, AustraliaHQ checked Sep 21, 2026	501-1,000	131 contacts →
	Indirect evidence “At Mondo, we see a bright future.” Source: RevenueBase Database · checked Sep 21, 2026
20	Integra Water Treatment Solutions	Partial evidence	Miranda, AustraliaHQ checked Sep 21, 2026	51-200	119 contacts →
	Partial evidence “Established in 1990, Integra Water Treatment Solutions is one of Australia’s largest privately owned and operated water treatment providers.” Source: RevenueBase Database · checked Sep 21, 2026
21	Talis Consultants	Indirect evidence	Leederville, AustraliaHQ checked Sep 21, 2026	51-200	108 contacts →
	Indirect evidence “Talis Consultants is now operating throughout Australia.” Source: RevenueBase Database · checked Sep 21, 2026
22	Burchills Engineering Solutions	Indirect evidence	South East Queensland, AustraliaHQ checked Sep 21, 2026	51-200	98 contacts →
	Indirect evidence “Burchills Engineering Solutions is a South East Qld based, locally owned multidisciplinary team of professional engineers & scientists with a track record of helping clients…” Source: RevenueBase Database · checked Sep 21, 2026
23	Hydroflux PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	95 contacts →
	Partial evidence “Water l Science l Technology The Hydroflux Group is a team of water and wastewater treatment experts harnessing the power of world leading research and technologies for a more…” Source: RevenueBase Database · checked Sep 21, 2026
24	CMP Consulting Group	Strong evidence	Mulgrave, AustraliaHQ checked Sep 21, 2026	51-200	94 contacts →
	Strong evidence “CMP Consulting Group is a multi-disciplinary Engineering firm specialising in design, project management and construction phase services for the Water Industry.” Source: RevenueBase Database · checked Sep 21, 2026
25	Hunter H2o	Partial evidence	Mayfield West, AustraliaHQ checked Sep 21, 2026	51-200	93 contacts →
	Partial evidence “Beca HunterH2O is a diverse, empowered, and trusted team of 300+ water specialists, passionate about healthy and sustainable communities wherever we work.” Source: RevenueBase Database · checked Sep 21, 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: water consulting 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 water consulting firms.
Partial evidence: Its own public description names part of water consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water consulting 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 457 water consulting firms based in Australia

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Water consulting firms based in Australia at a glance

As of Sep 21, 2026

47.9%Verified-email coverage

57.5Average contacts per company

1-10Median size (employees)

9.2%Largest-city concentration · Sydney

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

257

11-50

132

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for Australia, so it is reported there. Company counts and contact totals on this page are exact for Australia, over 457 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 water consulting 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 Australia whose own description of what they do matches “water consulting 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 water consulting 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 water consulting firms, and records with no verified work email. Companies headquartered outside Australia 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, 12,577 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 21, 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.

Water consulting firms by metro

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 water consulting 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 water consulting firms are there based in Australia?

RevenueBase identified 457 water consulting firms headquartered in Australia 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?

GHD, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most water consulting firms?

Sydney leads with 42 headquartered companies, followed by Melbourne (32) and Perth (25).

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 12,577 verified decision-maker contacts tracked across these 457 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 21, 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.