Company lists · Data refreshed September 2026

Top 25 Wastewater treatment companies based in Australia

Name: Wastewater treatment companies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 207 companies tracked

RevenueBase identified 207 wastewater treatment companies headquartered in Australia as of September 2026 and tracks 7,966 professional contacts across them, including 3,871 with verified work emails. Melbourne is the largest hub.

This list covers wastewater treatment companies 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 16, 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 16, 2026 86% judged on-target in blind review

207Companies

7,966Contacts tracked

3,871Verified emails

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The 25 largest wastewater treatment companies based in Australia

Ranked by team size

Top 25 of 207 wastewater treatment companies based in Australia, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to wastewater treatment companies: 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	Veolia Australia & NEW Zealand	Partial evidence	Pyrmont, AustraliaHQ checked Sep 16, 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 16, 2026
2	Urban Utilities	Partial evidence	Fortitude Valley, AustraliaHQ checked Sep 16, 2026	1,001-5,000	1,064 contacts →
	Partial evidence “We’re responsible for delivering world-class drinking water and wastewater services to the growing communities of Brisbane, Ipswich, Lockyer Valley, Somerset and Scenic Rim.” Source: RevenueBase Database · checked Sep 16, 2026
3	Yarra Valley Water	Indirect evidence	Melbourne, AustraliaHQ checked Sep 16, 2026	501-1,000	821 contacts →
	Indirect evidence “We service 2 million people and businesses across a area, from Wallan in the north to Warburton in the east.” Source: RevenueBase Database · checked Sep 16, 2026
4	Enviropacific	Indirect evidence	Macquarie Park, AustraliaHQ checked Sep 16, 2026	201-500	260 contacts →
	Indirect evidence “Enviropacific is committed to working towards creating safer environments and sustainable communities.” Source: RevenueBase Database · checked Sep 16, 2026
5	Hydrochem	Partial evidence	Braeside, AustraliaHQ checked Sep 16, 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 16, 2026
6	Trility	Partial evidence	Adelaide, AustraliaHQ checked Sep 16, 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 16, 2026
7	Aquatec	Partial evidence	Shepparton, AustraliaHQ checked Sep 16, 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 16, 2026
8	TDG Environmental	Indirect evidence	Victoria, AustraliaHQ checked Sep 16, 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 16, 2026
9	Atlan Stormwater	Partial evidence	Sydney Olympic Park, AustraliaHQ checked Sep 16, 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 16, 2026
10	Guidera O'connor	Strong evidence	Thebarton, AustraliaHQ checked Sep 16, 2026	51-200	137 contacts →
	Strong 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 16, 2026
11	Integra Water Treatment Solutions	Partial evidence	Miranda, AustraliaHQ checked Sep 16, 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 16, 2026
12	Hydroflux PTY LTD	Strong evidence	Sydney, AustraliaHQ checked Sep 16, 2026	51-200	95 contacts →
	Strong 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 16, 2026
13	CMP Consulting Group	Indirect evidence	Mulgrave, AustraliaHQ checked Sep 16, 2026	51-200	94 contacts →
	Indirect 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 16, 2026
14	PPS Group	Indirect evidence	Perth, AustraliaHQ checked Sep 16, 2026	201-500	81 contacts →
	Indirect evidence “PPS Water Group is a proudly Australian company delivering turnkey water infrastructure solutions to the resource sector and beyond.” Source: RevenueBase Database · checked Sep 16, 2026
15	Water Treatment Services Australia	Partial evidence	Townsville, AustraliaHQ checked Sep 16, 2026	11-50	80 contacts →
	Partial evidence “Water Treatment Services solves complex water problems using intelligent technologies and a whole-of-system approach to make water fit for use, reuse and release.” Source: RevenueBase Database · checked Sep 16, 2026
16	Scidev	Indirect evidence	Seven Hills, AustraliaHQ checked Sep 16, 2026	51-200	78 contacts →
	Indirect evidence “Our solutions allow our clients to recycle and reuse water, improve operational efficiencies and reduce their environmental footprints.” Source: RevenueBase Database · checked Sep 16, 2026
17	MAK Water	Strong evidence	Malaga, AustraliaHQ checked Sep 16, 2026	51-200	69 contacts →
	Strong evidence “At MAK Water, we help clients achieve reliable, cost-effective and sustainable water, wastewater and sewage treatment solutions.” Source: RevenueBase Database · checked Sep 16, 2026
18	Protex Water	Indirect evidence	Corio, AustraliaHQ checked Sep 16, 2026	51-200	65 contacts →
	Indirect evidence “Born from a 35-year heritage in the water industry, Protex Water is the new name for AKS Industries, effective 1st July 2024.” Source: RevenueBase Database · checked Sep 16, 2026
19	Hydro Flow Australia	Partial evidence	Noble Park North, AustraliaHQ checked Sep 16, 2026	51-200	49 contacts →
	Partial evidence “Manufacturer and supplier of water treatment chemicals, equipment and support services.” Source: RevenueBase Database · checked Sep 16, 2026
20	The Environmental Group Limited	Indirect evidence	Mount Waverley, AustraliaHQ checked Sep 16, 2026	201-500	44 contacts →
	Indirect evidence “Engineering a Sustainable Future The Environmental Group Limited is an environmental engineering company that provides products and engineering services to various industries to…” Source: RevenueBase Database · checked Sep 16, 2026
21	Aqseptence Group Australia	Partial evidence	Geebung, AustraliaHQ checked Sep 16, 2026	1,001-5,000	31 contacts →
	Partial evidence “Aqseptence Group is a global specialist for water and wastewater management, screening and filtration technologies for separating solids from liquids and gases, as well as vacuum…” Source: RevenueBase Database · checked Sep 16, 2026
22	Ozzi Kleen	Indirect evidence	Kunda Park, AustraliaHQ checked Sep 16, 2026	51-200	31 contacts →
	Indirect evidence “As the team behind the Ozzi Kleen product range, we strive to engineer, produce and maintain the highest level of quality not only for the pride we take in delivering reliable…” Source: RevenueBase Database · checked Sep 16, 2026
23	Aerofloat Australia	Strong evidence	Taren Point, AustraliaHQ checked Sep 16, 2026	11-50	30 contacts →
	Strong evidence “Aerofloat is a design & construct business that specialises in industrial wastewater treatment and sewage treatment.” Source: RevenueBase Database · checked Sep 16, 2026
24	Oleology	Partial evidence	Henderson, AustraliaHQ checked Sep 16, 2026	11-50	29 contacts →
	Partial evidence “OLEOLOGY is the name in water treatment, that offers effective, economically viable and market leading oil and hydrocarbon removal solutions.” Source: RevenueBase Database · checked Sep 16, 2026
25	ACO Halgan PTY LTD	Strong evidence	Wetherill Park, AustraliaHQ checked Sep 16, 2026	51-200	26 contacts →
	Strong evidence “ACO Halgan Pty Ltd, specialises in all aspects of wastewater treatment.” Source: RevenueBase Database · checked Sep 16, 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: wastewater treatment companies. 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 wastewater treatment companies.
Partial evidence: Its own public description names part of wastewater treatment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name wastewater treatment companies. 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 207 wastewater treatment companies based in Australia

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Wastewater treatment companies based in Australia at a glance

As of Sep 16, 2026

48.6%Verified-email coverage

38.5Average contacts per company

11-50Median size (employees)

6.8%Largest-city concentration · Melbourne

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

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 Australia, so it is reported there. Company counts and contact totals on this page are exact for Australia, over 207 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 wastewater treatment companies, 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 “wastewater treatment companies”. 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 wastewater treatment companies), 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 wastewater treatment companies, 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, 3,871 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 16, 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 wastewater treatment companies, 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 wastewater treatment companies are there based in Australia?

RevenueBase identified 207 wastewater treatment companies 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?

Veolia Australia & NEW Zealand, headquartered in Pyrmont, tops this list with the largest team on record.

Which city has the most wastewater treatment companies?

Melbourne leads with 14 headquartered companies, followed by Perth (11) and Sydney (9).

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 3,871 verified decision-maker contacts tracked across these 207 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 16, 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.