Company lists · Data refreshed September 2026

Top 25 Hydrology consulting firms based in Australia

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

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 181 companies tracked

RevenueBase identified 181 hydrology consulting firms headquartered in Australia as of September 2026 and tracks 2,207 professional contacts across them, including 1,365 with verified work emails and 302 with mobile numbers. Sydney is the largest hub.

This list covers hydrology 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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 HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

181Companies

2,207Contacts tracked

1,365Verified emails

302Mobile numbers

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The 25 largest hydrology consulting firms based in Australia

Ranked by team size

Top 25 of 181 hydrology consulting firms based in Australia, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names hydrology consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Water Technology PTY LTDIndirect evidence	Notting Hill, AustraliaHQ checked Sep 3, 2026	51-200	171
	“Since Water Technology has developed a reputation for delivering technically excellent and practically based services to Australia’s water, coastal and environmental sectors.” Source: company website · checked Sep 3, 2026
2	Hunter H2oIndirect evidence	Mayfield West, AustraliaHQ checked Sep 3, 2026	51-200	95
	“Beca HunterH2O is a diverse, empowered, and trusted team of 300+ water specialists, passionate about healthy and sustainable communities wherever we work.” Source: company website · checked Sep 3, 2026
3	RMCGIndirect evidence	Bendigo, AustraliaHQ checked Sep 3, 2026	51-200	79
	“Bringing clarity to complexity.” Source: company website · checked Sep 3, 2026
4	Bligh TannerIndirect evidence	Fortitude Valley, AustraliaHQ checked Sep 3, 2026	51-200	72
	“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…” Source: company website · checked Sep 3, 2026
5	HydrobiologyPartial evidence	Milton, AustraliaHQ checked Sep 3, 2026	11-50	66
	“Hydrobiology is an Environmental Consulting Company offering integrated services in the physical, biological and chemical processes of environmental systems with a particular…” Source: company website · checked Sep 3, 2026
6	HARCIndirect evidence	Blackburn, AustraliaHQ checked Sep 3, 2026	11-50	56
	“HARC is an employee-owned Australian engineering consultancy firm providing specialist services to the water sector.” Source: company website · checked Sep 3, 2026
7	Environmental Earth Sciences International EesiPartial evidence	Chatswood, AustraliaHQ checked Sep 3, 2026	51-200	49
	“EESI Group, a leader in brown environment consulting, serves the mining, waste & landfill, urban development, and farming sectors across Australia and the UK.” Source: company website · checked Sep 3, 2026
8	Australasian Groundwater And Environmental AGE ConsultantsIndirect evidence	Bowen Hills, AustraliaHQ checked Sep 3, 2026	11-50	48
	“We are Australia’s specialist groundwater consultancy.” Source: company website · checked Sep 3, 2026
9	WRM Water & Environment PTY LTDIndirect evidence	Brisbane City, AustraliaHQ checked Sep 3, 2026	11-50	47
	“WRM Water & Environment is a world-class consultancy specialising in flooding, water resource engineering and water management.” Source: company website · checked Sep 3, 2026
10	CDM Smith AustraliaIndirect evidence	Brisbane City, AustraliaHQ checked Sep 3, 2026	51-200	47
	“CDM Smith Australia provides meaningful and productive partnerships with our clients to solve complex water and environmental challenges.” Source: company website · checked Sep 3, 2026
11	Sellick Consultants PTY LTDPartial evidence	Braddon, AustraliaHQ checked Sep 3, 2026	11-50	40
	“Sellick Consultants is an award winning, multi-disciplinary engineering consulting firm offering superior design skills in the fields of structural, civil and hydraulic…” Source: company website · checked Sep 3, 2026
12	Bluesphere EnvironmentalIndirect evidence	Southbank, AustraliaHQ checked Sep 3, 2026	11-50	32
	“BlueSphere Environmental Pty Ltd (BlueSphere) is an Australian, employee owned, specialist environmental consultancy with a strong focus on site contamination management and…” Source: company website · checked Sep 3, 2026
13	CAF ConsultingPartial evidence	Shepparton, AustraliaHQ checked Sep 3, 2026	11-50	32
	“At CAF Consulting, we’re proud to be backed by decades of Engineering and Planning experience.” Source: company website · checked Sep 3, 2026
14	WmawaterIndirect evidence	Sydney, AustraliaHQ checked Sep 3, 2026	11-50	28
	“WMAWater is specialist engineering consultancy providing engineering analysis and advice in a range of water-related fields.” Source: company website · checked Sep 3, 2026
15	Aq2 PTY LTDIndirect evidence	Perth, AustraliaHQ checked Sep 3, 2026	11-50	26
	“Our Philosophy AQ2 is an independent water resources consultancy based in Perth.” Source: company website · checked Sep 3, 2026
16	Ecosafe InternationalIndirect evidence	Mandurah, AustraliaHQ checked Sep 3, 2026	11-50	26
	“We are a dynamic and growing specialist water risk management consultancy which focuses on the interface between water and health.” Source: company website · checked Sep 3, 2026
17	Reditus ConsultingPartial evidence	Kirrawee, AustraliaHQ checked Sep 3, 2026	11-50	25
	“Reditus is a professional services firm established to provide responsive, high quality, specialist consulting services in hydrogeology, environmental, contaminated land and…” Source: company website · checked Sep 3, 2026
18	Neilly Group PTY LTDIndirect evidence	Townsville, AustraliaHQ checked Sep 3, 2026	11-50	23
	“Neilly Group Engineering are specialists in surface water and chemical process engineering.” Source: company website · checked Sep 3, 2026
19	Urban Water SolutionsIndirect evidence	Collingwood, AustraliaHQ checked Sep 3, 2026	11-50	23
	“Urban Water Solutions (UWS) is a niche Australian based water engineering consultancy with an office in Collingwood and specialises in professional services for water, wastewater…” Source: company website · checked Sep 3, 2026
20	Valenza Engineering GroupIndirect evidence	Melbourne, AustraliaHQ checked Sep 3, 2026	11-50	21
	“Valenza Engineering is a global specialist groundwater engineering company providing high-quality, full-spectrum technical solutions in the fields of groundwater engineering and…” Source: company website · checked Sep 3, 2026
21	RockwaterPartial evidence	Jolimont, AustraliaHQ checked Sep 3, 2026	11-50	20
	“Rockwater is a specialist hydrogeological and environmental consulting firm with the office in Perth, Western Australia.” Source: company website · checked Sep 3, 2026
22	StreamologyPartial evidence	Docklands, AustraliaHQ checked Sep 3, 2026	11-50	20
	“Streamology was born from the desire to combine research with consulting and a passion for the environment.” Source: company website · checked Sep 3, 2026
23	Fifteen50 Consulting PTY LTDIndirect evidence	Melbourne & Echuca, AustraliaHQ checked Sep 3, 2026	11-50	20
	“The diversity and importance of each of the 1,550 miles of the River Murray drives us.” Source: company website · checked Sep 3, 2026
24	JB PacificIndirect evidence	Brisbane, AustraliaHQ checked Sep 3, 2026	11-50	19
	“JB Pacific are specialists in extreme weather engineering, natural hazards and climate-related risks.” Source: company website · checked Sep 3, 2026
25	RECPartial evidence	Perth, AustraliaHQ checked Sep 3, 2026	11-50	19
	“An integrated engineering house, our mining consulting solutions have optimised some of the world’s largest tailings impoundments and backed the success of the design, approval…” Source: company website · checked Sep 3, 2026

Showing 25 of 181 hydrology consulting firms based in Australia

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Hydrology consulting firms based in Australia at a glance

As of Sep 3, 2026

1-10Median size (employees)

SydneyLargest hub · 22 HQs

302Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

119

11-50

51-200

201-500

Verified emails by last verification

0–30

31–60

121

61–90

808

90–180

434

180+

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 hydrology consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Australia whose own description of what they do matches “hydrology consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among hydrology 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 an evidence 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, 1,365 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 3, 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

How many hydrology consulting firms are there based in Australia?

RevenueBase identified 181 hydrology 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?

Water Technology PTY LTD, headquartered in Wangaratta, tops this list with the largest team on record.

Which city has the most hydrology consulting firms?

Sydney leads with 22 headquartered companies, followed by Brisbane (12) and Melbourne (11).

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 1,365 verified decision-maker contacts tracked across these 181 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 3, 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.