Company lists · Data refreshed September 2026

Top 25 Wastewater engineering and design firms based in Australia

RevenueBase identified 350 company matches for wastewater engineering and design firms associated with Australia as of September 2026 and tracks 5,712 professional contacts across them, including 3,042 with verified work emails. Sydney is the largest hub.

This list covers company matches for wastewater engineering and design firms associated with Australia, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built
350Companies
5,712Contacts tracked
3,042Verified emails
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The 25 largest wastewater engineering and design firms based in Australia

Ranked by team size
Top 25 of 350 company matches for wastewater engineering and design firms based in Australia, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchFortitude Valley, AustraliaHQ recorded Sep 19, 20261,001-5,000985 contacts →

Exact match

“Cardno is now officially Stantec.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2Exact matchUnley, AustraliaHQ recorded Sep 19, 2026201-500346 contacts →

Exact match

“A highly experienced, multidisciplinary engineering and management firm, GPA has consulted and provided engineering, procurement and construction management (EPCM) services, since…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchMacquarie Park, AustraliaHQ recorded Sep 19, 2026201-500260 contacts →

Exact match

“Enviropacific is committed to working towards creating safer environments and sustainable communities.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchAdelaide, AustraliaHQ recorded Sep 19, 2026201-500237 contacts →

Exact match

“Tonkin is a leading provider of engineering, environmental and consultancy services to private and public organisations.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchAdelaide, AustraliaHQ recorded Sep 19, 2026201-500217 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchShepparton, AustraliaHQ recorded Sep 19, 202651-200177 contacts →

Exact match

“Aquatec partners with Government, business and residential clients to deliver water, wastewater and odour control solutions for the long-term.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchSydney Olympic Park, AustraliaHQ recorded Sep 19, 2026201-500147 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchThebarton, AustraliaHQ recorded Sep 19, 202651-200137 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchSouth East Queensland, AustraliaHQ recorded Sep 19, 202651-20098 contacts →

Exact match

“Burchills Engineering Solutions is a South East Qld based, locally owned multidisciplinary team of professional engineers & scientists with a track record of helping clients…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchSydney, AustraliaHQ recorded Sep 19, 202651-20095 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchMulgrave, AustraliaHQ recorded Sep 19, 202651-20094 contacts →

Exact match

“CMP Consulting Group is a multi-disciplinary Engineering firm specialising in design, project management and construction phase services for the Water Industry.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchMayfield West, AustraliaHQ recorded Sep 19, 202651-20093 contacts →

Exact match

“Beca HunterH2O is a diverse, empowered, and trusted team of 300+ water specialists, passionate about healthy and sustainable communities wherever we work.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchPerth, AustraliaHQ recorded Sep 19, 2026201-50081 contacts →

Exact match

“PPS Water Group is a proudly Australian company delivering turnkey water infrastructure solutions to the resource sector and beyond.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchFortitude Valley, AustraliaHQ recorded Sep 19, 202651-20069 contacts →

Exact match

“With offices in Brisbane and Sydney, Bligh Tanner is a structural, façade, civil, environmental and water engineering consultancy distinguished by its high level of expertise…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchMalaga, AustraliaHQ recorded Sep 19, 202651-20069 contacts →

Exact match

“At MAK Water, we help clients achieve reliable, cost-effective and sustainable water, wastewater and sewage treatment solutions.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchFortitude Valley, AustraliaHQ recorded Sep 19, 202651-20065 contacts →

Exact match

“Witthoft Engineering Pty Ltd is an engineering consultancy company based in Brisbane, Australia, which specialises in electrical, instrumentation, industrial control system…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchMulgrave, AustraliaHQ recorded Sep 19, 2026501-1,00062 contacts →

Exact match

“In 2025, Aqua Metro was acquired by Saunders (ASX:SND)- a leading Australian engineering, construction and industrial services company delivering multidisciplinary solutions…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchBibra Lake, AustraliaHQ recorded Sep 19, 202651-20062 contacts →

Exact match

“SPIRAC PROVIDES SOLIDS HANDLING SOLUTIONS FOR MUNICIPAL WASTEWATER AND INDUSTRIAL APPLICATIONS Municipal screening, grit and sludge handling solutions are our primary focus, but…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchSydney, AustraliaHQ recorded Sep 19, 202651-20057 contacts →

Exact match

“Established in 2012, Triaxial Consulting are a firm of Consulting Civil and Structural Engineers, who provide a suite of specialist consulting engineering services, to all…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchNorth Sydney, AustraliaHQ recorded Sep 19, 202651-20051 contacts →

Exact match

“Atlas, now part of the Sequana Group, has been specialising in brownfield water & wastewater programs and projects from day one.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchBrisbane City, AustraliaHQ recorded Sep 19, 202611-5047 contacts →

Exact match

“WRM Water & Environment is a world-class consultancy specialising in flooding, water resource engineering and water management.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchMount Waverley, AustraliaHQ recorded Sep 19, 2026201-50044 contacts →

Exact match

“Engineering a Sustainable Future The Environmental Group Limited is an environmental engineering company that provides products and engineering services to various industries to…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchBraddon, AustraliaHQ recorded Sep 19, 202611-5040 contacts →

Exact match

“Sellick Consultants is an award winning, multi-disciplinary engineering consulting firm offering superior design skills in the fields of structural, civil and hydraulic…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchSydney, AustraliaHQ recorded Sep 19, 202651-20040 contacts →

Exact match

“WSce is a multi-discipline Australian-owned consulting engineering firm specialising in civil, water, hydraulic, fire services (wet & dry fire) and specialty water and wasterwater…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchParramatta, AustraliaHQ recorded Sep 19, 202611-5039 contacts →

Exact match

“Established more than 30-years ago, Sparks+Partners Consulting Engineers has a rich history and expertise in quality engineering.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 350 wastewater engineering and design firms based in Australia

See the full list, filter by size, metro and specialty, and access 3,042 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Wastewater engineering and design firms based in Australia at a glance

As of Sep 19, 2026
53.3%Verified-email coverage
16.3Average contacts per company
1-10Median size (employees)
11.4%Largest-city concentration · Sydney
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
198
11-50
108
51-200
28
201-500
9
501-1,000
3
1,001-5,000
2

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 350 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Australia whose business descriptions match “wastewater engineering and design firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,042 professional contacts with verified work emails across the full matched dataset. 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 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “wastewater engineering and design firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many wastewater engineering and design firms are there based in Australia?

RevenueBase identified 350 company matches for wastewater engineering and design firms associated with Australia as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Cardno tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most wastewater engineering and design firms?

Sydney leads with 40 company records, followed by Melbourne (23) and Perth (10).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,042 professional contacts with verified work emails tracked across these 350 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 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 SmartSearch, 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.