Company lists · Data refreshed September 2026

Top 25 Aqueous waste treatment contractors based in Australia

Name: Aqueous waste treatment contractors based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 143 companies tracked

RevenueBase identified 143 aqueous waste treatment contractors headquartered in Australia as of September 2026 and tracks 2,282 professional contacts across them, including 1,089 with verified work emails. Melbourne is the largest hub.

This list covers aqueous waste treatment contractors 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 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

143Companies

2,282Contacts tracked

1,089Verified emails

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The 25 largest aqueous waste treatment contractors based in Australia

Ranked by team size

Top 25 of 143 aqueous waste treatment contractors based in Australia, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to aqueous waste treatment 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	Hydrochem	Partial evidence	Braeside, AustraliaHQ checked Sep 30, 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 30, 2026
2	Aquatec	Indirect evidence	Shepparton, AustraliaHQ checked Sep 30, 2026	51-200	177 contacts →
	Indirect 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 30, 2026
3	Atlan Stormwater	Partial evidence	Sydney Olympic Park, AustraliaHQ checked Sep 30, 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 30, 2026
4	Guidera O'connor	Partial evidence	Thebarton, AustraliaHQ checked Sep 30, 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 30, 2026
5	Hydroflux PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 30, 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 30, 2026
6	Water Treatment Services Australia	Partial evidence	Townsville, AustraliaHQ checked Sep 30, 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 30, 2026
7	Scidev	Indirect evidence	Seven Hills, AustraliaHQ checked Sep 30, 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 30, 2026
8	MAK Water	Partial evidence	Malaga, AustraliaHQ checked Sep 30, 2026	51-200	69 contacts →
	Partial evidence “At MAK Water, we help clients achieve reliable, cost-effective and sustainable water, wastewater and sewage treatment solutions.” Source: RevenueBase Database · checked Sep 30, 2026
9	Protex Water	Indirect evidence	Corio, AustraliaHQ checked Sep 30, 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 30, 2026
10	CSA Specialised Services	Partial evidence	Dandenong South, AustraliaHQ checked Sep 30, 2026	51-200	58 contacts →
	Partial evidence “CSA Specialised services are your Liquid waste removal specialists, we provide 24-hour emergency response 365 days of the year, for site clean-up, spill containment and…” Source: RevenueBase Database · checked Sep 30, 2026
11	Hydro Flow Australia	Partial evidence	Noble Park North, AustraliaHQ checked Sep 30, 2026	51-200	49 contacts →
	Partial evidence “Manufacturer and supplier of water treatment chemicals, equipment and support services.” Source: RevenueBase Database · checked Sep 30, 2026
12	The Environmental Group Limited	Indirect evidence	Mount Waverley, AustraliaHQ checked Sep 30, 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 30, 2026
13	Ozzi Kleen	Indirect evidence	Kunda Park, AustraliaHQ checked Sep 30, 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 30, 2026
14	Aerofloat Australia	Partial evidence	Taren Point, AustraliaHQ checked Sep 30, 2026	11-50	30 contacts →
	Partial evidence “Aerofloat is a design & construct business that specialises in industrial wastewater treatment and sewage treatment.” Source: RevenueBase Database · checked Sep 30, 2026
15	The Austrans Group	Partial evidence	Wulkuraka, AustraliaHQ checked Sep 30, 2026	51-200	29 contacts →
	Partial evidence “Austrans is a waste & industrial services provider.” Source: RevenueBase Database · checked Sep 30, 2026
16	Oleology	Partial evidence	Henderson, AustraliaHQ checked Sep 30, 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 30, 2026
17	ACO Halgan PTY LTD	Partial evidence	Wetherill Park, AustraliaHQ checked Sep 30, 2026	51-200	26 contacts →
	Partial evidence “ACO Halgan Pty Ltd, specialises in all aspects of wastewater treatment.” Source: RevenueBase Database · checked Sep 30, 2026
18	SAS Water Solutions	Partial evidence	Castle Hill Nsw, AustraliaHQ checked Sep 30, 2026	11-50	22 contacts →
	Partial evidence “SAS Water provides unique customised solutions for treatment of Process & Potable water, Sewerage & Recycled water, Storm water harvesting, landfill Leachate, Sewer mining…” Source: RevenueBase Database · checked Sep 30, 2026
19	Renex Group	Strong evidence	Dandenong South, AustraliaHQ checked Sep 30, 2026	11-50	17 contacts →
	Strong evidence “RENEX has built Australia’s first permanently located Integrated Waste Treatment & Resource Recovery Facility for the treatment of contaminated soils and other Prescribed…” Source: RevenueBase Database · checked Sep 30, 2026
20	Aquacell PTY LTD	Partial evidence	Milsons Point, AustraliaHQ checked Sep 30, 2026	11-50	16 contacts →
	Partial evidence “At Aquacell, we don't think we should waste water, so we take the waste out of wastewater.” Source: RevenueBase Database · checked Sep 30, 2026
21	Bioaction PTY LTD	Indirect evidence	Tuggerah, AustraliaHQ checked Sep 30, 2026	11-50	14 contacts →
	Indirect evidence “Bioaction Pty Ltd is a privately owned business that was established to develop unique solutions to environmental problems.” Source: RevenueBase Database · checked Sep 30, 2026
22	PR Water	Partial evidence	Wangara, AustraliaHQ checked Sep 30, 2026	11-50	13 contacts →
	Partial evidence “PR Water is an Australian wide company providing industrial water treatment, dust suppression and truck wheel wash equipment.” Source: RevenueBase Database · checked Sep 30, 2026
23	Remote Water Treatment Services	Partial evidence	Tingalpa, AustraliaHQ checked Sep 30, 2026	11-50	10 contacts →
	Partial evidence “Remote Water Treatment Services is proud to be Australia’s trusted water treatment specialists.” Source: RevenueBase Database · checked Sep 30, 2026
24	Stows Waste Management	Partial evidence	Campbellfield, AustraliaHQ checked Sep 30, 2026	11-50	10 contacts →
	Partial evidence “Stows has grown steadily over the years to become a leader in the collection, transport and disposal of liquid and solid wastes for a diverse range of industries.” Source: RevenueBase Database · checked Sep 30, 2026
25	Harmor Services	Partial evidence	Kilsyth, AustraliaHQ checked Sep 30, 2026	11-50	10 contacts →
	Partial evidence “Harmor Liquid Wastewater Management is one of Australia’s most comprehensive providers of liquid waste, industrial cleaning and environmental management 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: aqueous waste treatment 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 aqueous waste treatment contractors.
Partial evidence: Its own public description names part of aqueous waste treatment contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name aqueous waste treatment 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 143 aqueous waste treatment contractors based in Australia

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Aqueous waste treatment contractors based in Australia at a glance

As of Sep 30, 2026

47.7%Verified-email coverage

16.0Average contacts per company

11-50Median size (employees)

5.6%Largest-city concentration · Melbourne

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 143 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 aqueous waste treatment 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 Australia whose own description of what they do matches “aqueous waste treatment 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 aqueous waste treatment 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 aqueous waste treatment contractors, 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, 1,089 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 aqueous waste treatment 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 aqueous waste treatment contractors are there based in Australia?

RevenueBase identified 143 aqueous waste treatment contractors 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?

Hydrochem, headquartered in Braeside, tops this list with the largest team on record.

Which city has the most aqueous waste treatment contractors?

Melbourne leads with 8 headquartered companies, followed by Perth (7) and Sydney (7).

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 1,089 verified decision-maker contacts tracked across these 143 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.