Company lists · Data refreshed September 2026

Top 25 Hydrogeological survey companies based in South Africa

Name: Hydrogeological survey companies based in South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 117 companies tracked

RevenueBase identified 117 hydrogeological survey companies headquartered in South Africa as of September 2026 and tracks 809 professional contacts across them, including 224 with verified work emails. Johannesburg is the largest hub.

This list covers hydrogeological survey companies headquartered in South Africa, 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 20, 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 20, 2026 86% judged on-target in blind review

117Companies

809Contacts tracked

224Verified emails

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The 25 largest hydrogeological survey companies based in South Africa

Ranked by team size

Top 25 of 117 hydrogeological survey companies based in South Africa, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to hydrogeological survey 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	Geogroup	Indirect evidence	Sunrella, South AfricaHQ checked Sep 20, 2026	201-500	68 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
2	GCS Water & Environmental Consultants PTY LTD	Indirect evidence	Rivonia, South AfricaHQ checked Sep 20, 2026	11-50	63 contacts →
	Indirect evidence “Established in 1987, GCS (Pty) Ltd is an independent consultancy offering a range of professional services within the fields of water, environmental and earth sciences.” Source: RevenueBase Database · checked Sep 20, 2026
3	Geosure PTY LTD	Indirect evidence	Durban, South AfricaHQ checked Sep 20, 2026	51-200	57 contacts →
	Indirect evidence “Since the company's inception in 1992, Geosure has established a formidable reputation in Southern African Geotechnics.” Source: RevenueBase Database · checked Sep 20, 2026
4	Wireline Africa	Indirect evidence	Mooi Nooi, South AfricaHQ checked Sep 20, 2026	51-200	52 contacts →
	Indirect evidence “Wireline Africa is an engineering company that focuses on supplying the local and international mining industry with products and services.” Source: RevenueBase Database · checked Sep 20, 2026
5	Singo Consulting	Indirect evidence	Emalahleni, South AfricaHQ checked Sep 20, 2026	51-200	44 contacts →
	Indirect evidence “Singo Consulting (Pty) Ltd is a private independent research consultancy and advisory company based in eMalahleni (Witbank), holding no equity in any project and is owned by the…” Source: RevenueBase Database · checked Sep 20, 2026
6	Umvoto	Indirect evidence	Cape Town, South AfricaHQ checked Sep 20, 2026	11-50	37 contacts →
	Indirect evidence “Umvoto is an earth sciences consultancy, specializing in environmental resource development, management and sustainability.” Source: RevenueBase Database · checked Sep 20, 2026
7	Premier Mapping Africa	Indirect evidence	Cullinan, South AfricaHQ checked Sep 20, 2026	51-200	34 contacts →
	Indirect evidence “Our scope now includes the engineering, environmental and exploration sectors.” Source: RevenueBase Database · checked Sep 20, 2026
8	Geoss South Africa	Indirect evidence	Stellenbosch, South AfricaHQ checked Sep 20, 2026	11-50	31 contacts →
	Indirect evidence “GEOSS, established on 1 March 2001, specializes in all aspects of hydrogeology, including: • Groundwater exploration (borehole siting, drilling supervision with logging, pumping…” Source: RevenueBase Database · checked Sep 20, 2026
9	Peragage	Indirect evidence	City Of Tshwane, South AfricaHQ checked Sep 20, 2026	11-50	25 contacts →
	Indirect evidence “PeraGage is a Leading, Trusted and the Preferred specialist firm of geo-consultants including hydrogeologists, geotechnical engineers and engineering geologists operating…” Source: RevenueBase Database · checked Sep 20, 2026
10	Rafuni PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	22 contacts →
	Indirect evidence “Rafuni offers Geotechnical, Geological and Environmental Consulting Services.” Source: RevenueBase Database · checked Sep 20, 2026
11	JMA Consulting	Indirect evidence	Delmas, South AfricaHQ checked Sep 20, 2026	11-50	21 contacts →
	Indirect evidence “INTRODUCTION JMA Consulting (Pty) Ltd is an environmental consulting company which comprises of highly trained professionals, each of whom are registered with the South African…” Source: RevenueBase Database · checked Sep 20, 2026
12	Guillaume NEL Environmental Consultants Gnec	Indirect evidence	Paarl, South AfricaHQ checked Sep 20, 2026	11-50	14 contacts →
	Indirect evidence “We specialize in Environmental Impact Assessments, Basic Assessment Reports, Environmental Control Officers, Water Use Licenses Application, Waste Management and Mining…” Source: RevenueBase Database · checked Sep 20, 2026
13	Nsovo Environmental Consulting	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “Our specialist area of focus is the assessment of multifaceted projects, including the establishment of linear developments, bulk infrastructure, power generation and…” Source: RevenueBase Database · checked Sep 20, 2026
14	Artesium Consulting Services	Partial evidence	Pretoria, South AfricaHQ checked Sep 20, 2026	1-10	12 contacts →
	Partial evidence “We are passionate about our vision to provide world leading hydrogeological and mine water management specialist services with the goal of value engineering and determination of…” Source: RevenueBase Database · checked Sep 20, 2026
15	Geomeasure Group PTY LTD	Indirect evidence	Hillcrest, South AfricaHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence “The Geomeasure Group (Pty) Ltd was founded on 1 July 2002 with the aim of creating a company with a multidisciplinary team of specialist professionals, with the preservation of…” Source: RevenueBase Database · checked Sep 20, 2026
16	Sillito Environmental Consulting PTY LTD	Indirect evidence	Cape Town, South AfricaHQ checked Sep 20, 2026	11-50	10 contacts →
	Indirect evidence “Sillito Environmental Consulting provides expertise in the areas of environmental authorisation, licencing, monitoring and auditing, contamination assessment, development of…” Source: RevenueBase Database · checked Sep 20, 2026
17	Enviroworks	Indirect evidence	Bloemfontein, South AfricaHQ checked Sep 20, 2026	1-10	9 contacts →
	Indirect evidence “Enviroworks provides environmental management services in the fields of impact assessments, project management, planning, monitoring and auditing, mining, conservation…” Source: RevenueBase Database · checked Sep 20, 2026
18	Aqua Earth	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	8 contacts →
	Indirect evidence “Aqua Earth celebrates more than 20 years of operation and prides itself on having a dynamic team of specialists in Hydrogeology, also identified as Groundwater, as well as…” Source: RevenueBase Database · checked Sep 20, 2026
19	BAV Consulting SA	Partial evidence	Durban, South AfricaHQ checked Sep 20, 2026	1-10	6 contacts →
	Partial evidence “We provide a reliable and efficient Geo-tech, Geo-hydrology, Survey, Civil Engineering and Project Management services to the engineering and sciences sectors for both private and…” Source: RevenueBase Database · checked Sep 20, 2026
20	WIMS	Indirect evidence	Pretoria, South AfricaHQ checked Sep 20, 2026	1-10	6 contacts →
	Indirect evidence “WIMS helps mining hydrogeologists stop chasing data and start interpreting it by bringing groundwater, abstraction, and water quality monitoring into one trusted platform.” Source: RevenueBase Database · checked Sep 20, 2026
21	KLM Consulting Services PTY LTD	Indirect evidence	Lanseria, South AfricaHQ checked Sep 20, 2026	11-50	4 contacts →
	Indirect evidence “KLM Consulting Services (KLMCS) is a multi-disciplinary consulting company, specializing in mine dewatering, depressurisation and management of water resources.” Source: RevenueBase Database · checked Sep 20, 2026
22	Emanti Management	Indirect evidence	Stellenbosch, South AfricaHQ checked Sep 20, 2026	1-10	4 contacts →
	Indirect evidence “Emanti Management (Pty) Ltd is an expanding broad-based Black Economic Empowerment (BEE) Water and Environmental Engineering specialist consultancy focused on assisting both the…” Source: RevenueBase Database · checked Sep 20, 2026
23	Lefatshe Minerals And Consulting	Indirect evidence	Pretoria, South AfricaHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “Lefatshe Minerals and Consulting (PTY)Ltd, is a 100% Black owned and managed diversified company and has completed successful projects (nationally and internationally) which…” Source: RevenueBase Database · checked Sep 20, 2026
24	Amaza Surveys	Partial evidence	Pietermaritzburg, South AfricaHQ checked Sep 20, 2026	1-10	3 contacts →
	Partial evidence “Amaza Surveys offers hydrospatial consulting, hydrographic survey equipment sales and rentals, hydrographic survey support, hydrospatial project management, as well as…” Source: RevenueBase Database · checked Sep 20, 2026
25	Kwadiwa Africa	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “Kwadiwa Africa offers consulting services within the water, environmental management and engineering service sectors.” Source: RevenueBase Database · checked Sep 20, 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: hydrogeological survey 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 hydrogeological survey companies.
Partial evidence: Its own public description names part of hydrogeological survey companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydrogeological survey 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 117 hydrogeological survey companies based in South Africa

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Hydrogeological survey companies based in South Africa at a glance

As of Sep 20, 2026

27.7%Verified-email coverage

6.9Average contacts per company

1-10Median size (employees)

15.4%Largest-city concentration · Johannesburg

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for South Africa, so it is reported there. Company counts and contact totals on this page are exact for South Africa, over 117 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 hydrogeological survey 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 South Africa whose own description of what they do matches “hydrogeological survey 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 hydrogeological survey 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 hydrogeological survey companies, and records with no verified work email. Companies headquartered outside South Africa 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, 224 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 20, 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 hydrogeological survey 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 hydrogeological survey companies are there based in South Africa?

RevenueBase identified 117 hydrogeological survey companies headquartered in South Africa 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?

Geogroup, headquartered in Gauteng, tops this list with the largest team on record.

Which city has the most hydrogeological survey companies?

Johannesburg leads with 18 headquartered companies, followed by Pretoria (13) and City Of Tshwane (5).

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 224 verified decision-maker contacts tracked across these 117 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 20, 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.