Company lists · Data refreshed September 2026

Top 25 Water resources management companies based in South Africa

Name: Water resources management companies based in South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 137 companies tracked

RevenueBase identified 137 water resources management companies headquartered in South Africa as of September 2026 and tracks 3,222 professional contacts across them, including 724 with verified work emails. Johannesburg is the largest hub.

This list covers water resources management 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 22, 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 22, 2026 86% judged on-target in blind review

137Companies

3,222Contacts tracked

724Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest water resources management companies based in South Africa

Ranked by team size

Top 25 of 137 water resources management companies based in South Africa, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to water resources management 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	ERWAT	Strong evidence	Kempton Park, South AfricaHQ checked Sep 22, 2026	501-1,000	270 contacts →
	Strong evidence “ERWAT provides sustainable, affordable, quality water care and resource recovery services through partnerships and collaborative initiatives with external role players, utilising…” Source: RevenueBase Database · checked Sep 22, 2026
2	Talbot	Strong evidence	Durban, South AfricaHQ checked Sep 22, 2026	51-200	202 contacts →
	Strong evidence “Increasing pressure on water resources is leading to a global rise in supply-risk and cost of total water management.” Source: RevenueBase Database · checked Sep 22, 2026
3	Nafasi Water	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	201-500	175 contacts →
	Partial evidence “Nafasi Water, formerly known as Aveng Water is a 100% black-owned leading water technology and water utility service company.” Source: RevenueBase Database · checked Sep 22, 2026
4	Pegasys Consulting	Partial evidence	Cape Town, South AfricaHQ checked Sep 22, 2026	51-200	170 contacts →
	Partial evidence “Pegasys is a multidisciplinary strategic management consulting group with expertise in the development and management of climate change, cities, energy, resilience, transport…” Source: RevenueBase Database · checked Sep 22, 2026
5	IX Engineers PTY LTD	Partial evidence	City Of Tshwane, South AfricaHQ checked Sep 22, 2026	201-500	136 contacts →
	Partial evidence “iX engineers is a proudly South African multi-disciplinary consulting engineering company with a focus on five key market sectors, being; Water, Energy, Transport, Development…” Source: RevenueBase Database · checked Sep 22, 2026
6	JOAT	Strong evidence	Pinetown, South AfricaHQ checked Sep 22, 2026	51-200	69 contacts →
	Strong evidence “The JOAT Group of companies specialises in all aspects of water distribution management, energy efficiency in the water industry, instrumentation and control, and related…” Source: RevenueBase Database · checked Sep 22, 2026
7	GCS Water & Environmental Consultants PTY LTD	Partial evidence	Rivonia, South AfricaHQ checked Sep 22, 2026	11-50	63 contacts →
	Partial 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 22, 2026
8	Msinsi Holdings SOC	Strong evidence	Ethekwini, South AfricaHQ checked Sep 22, 2026	51-200	62 contacts →
	Strong evidence “This is a water resource management company on behalf of Umgeni Water.” Source: RevenueBase Database · checked Sep 22, 2026
9	Watericon	Strong evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	51-200	51 contacts →
	Strong evidence “As the start and end-point for every aspect of water purity and preservation in Africa, our customers, the environment, and preserving nature‘s most precious resource are at the…” Source: RevenueBase Database · checked Sep 22, 2026
10	WRP Consulting Engineers	Indirect evidence	Groenkloof, South AfricaHQ checked Sep 22, 2026	11-50	37 contacts →
	Indirect evidence “WRP is a proudly level 2 BB-BEE specialist engineering consultancy founded and cultivated in South Africa.” Source: RevenueBase Database · checked Sep 22, 2026
11	Rolfes Water PTY LTD	Partial evidence	Jet Park, South AfricaHQ checked Sep 22, 2026	51-200	34 contacts →
	Partial evidence “Water challenges don't wait for perfect solutions.” Source: RevenueBase Database · checked Sep 22, 2026
12	Groundtruth	Partial evidence	Hilton, South AfricaHQ checked Sep 22, 2026	11-50	32 contacts →
	Partial evidence “An award-winning multidisciplinary consulting company with over 20 years experience in water, biodiversity, and engineering across aquatic and terrestrial ecosystems.” Source: RevenueBase Database · checked Sep 22, 2026
13	Kainos Projects Africa	Partial evidence	Cape Town, South AfricaHQ checked Sep 22, 2026	11-50	28 contacts →
	Partial evidence “Kainos Projects Africa (Kainos) consists of a multidisciplinary team of engineers and technicians with a combined >100 years’ experience in a wide range of technologies in water…” Source: RevenueBase Database · checked Sep 22, 2026
14	Pro-Plan Consulting Engineers	Partial evidence	Noordheuwel, South AfricaHQ checked Sep 22, 2026	51-200	24 contacts →
	Partial evidence “Pro-Plan Consulting Engineers is a South African firm specialising in water and civil infrastructure-from bulk water supply, treatment plants and reservoirs to multidisciplinary…” Source: RevenueBase Database · checked Sep 22, 2026
15	Water And Sanitation Services South Africa Proprietary Limited	Indirect evidence	Sandton, South AfricaHQ checked Sep 22, 2026	1-10	23 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
16	Aquaffection PTY LTD	Indirect evidence	Pretoria, South AfricaHQ checked Sep 22, 2026	11-50	19 contacts →
	Indirect evidence “AQUAffection is a company based out of Scientia Technopark, Pretoria, Gauteng, South Africa.” Source: RevenueBase Database · checked Sep 22, 2026
17	Prosep PTY LTD	Partial evidence	Boksburg, South AfricaHQ checked Sep 22, 2026	51-200	18 contacts →
	Partial evidence “Welcome to Prosep, a premier leader in the water treatment industry with over 20 years of experience.” Source: RevenueBase Database · checked Sep 22, 2026
18	Elsumo PTY LTD	Partial evidence	Stellenbosch, South AfricaHQ checked Sep 22, 2026	51-200	17 contacts →
	Partial evidence “For over a century, Elsumo has supplied Southern Africa with the highest grade of water supply and irrigation products.” Source: RevenueBase Database · checked Sep 22, 2026
19	Triplo4 Sustainable Solutions PTY LTD	Indirect evidence	Ballito, South AfricaHQ checked Sep 22, 2026	11-50	14 contacts →
	Indirect evidence “Triplo 4 specialises in solving environmental challenges and improving environmental performance in a sustainable manner.” Source: RevenueBase Database · checked Sep 22, 2026
20	Hidro-Tech Systems	Partial evidence	Cape Town, South AfricaHQ checked Sep 22, 2026	11-50	14 contacts →
	Partial evidence “Hidro-Tech is a leading water and wastewater treatment engineering firm.” Source: RevenueBase Database · checked Sep 22, 2026
21	Hall Core Water	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	13 contacts →
	Indirect evidence “RESPONSIBLE.” Source: RevenueBase Database · checked Sep 22, 2026
22	Impumelelo Consulting Engineers	Indirect evidence	Pietermaritzburg, South AfricaHQ checked Sep 22, 2026	11-50	10 contacts →
	Indirect evidence “Impumelelo Consulting Engineers (Pty) Ltd Impumelelo Consulting Engineers is a leading South African engineering consultancy specializing in infrastructure development and…” Source: RevenueBase Database · checked Sep 22, 2026
23	Sillito Environmental Consulting PTY LTD	Indirect evidence	Cape Town, South AfricaHQ checked Sep 22, 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 22, 2026
24	Telos Water	Strong evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	9 contacts →
	Strong evidence “Telos Water comprises of a team of highly experienced engineers and project managers providing water management solutions to the mining, industrial and municipal sectors.” Source: RevenueBase Database · checked Sep 22, 2026
25	Letsolo Water And Environmental Services CC	Partial evidence	Pretoria, South AfricaHQ checked Sep 22, 2026	1-10	9 contacts →
	Partial evidence “Letsolo Water and Environmental Services is a proudly South African company dedicated to delivering sustainable, compliant, and innovative solutions across the water and…” Source: RevenueBase Database · checked Sep 22, 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: water resources management 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 water resources management companies.
Partial evidence: Its own public description names part of water resources management companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water resources management 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 137 water resources management companies based in South Africa

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 724 reachable decision-makers.

Free signup · no credit card

View the full list →

Water resources management companies based in South Africa at a glance

As of Sep 22, 2026

22.5%Verified-email coverage

23.5Average contacts per company

1-10Median size (employees)

16.1%Largest-city concentration · Johannesburg

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 137 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 water resources management 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 “water resources management 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 water resources management 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 water resources management 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, 724 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 22, 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 water resources management 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 water resources management companies are there based in South Africa?

RevenueBase identified 137 water resources management 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?

ERWAT, headquartered in Kempton Park, tops this list with the largest team on record.

Which city has the most water resources management companies?

Johannesburg leads with 22 headquartered companies, followed by Pretoria (18) and Cape Town (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 724 verified decision-maker contacts tracked across these 137 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 22, 2026.

Ready to reach these companies? Verified emails and direct dials for all 137 water resources management companies based in South Africa. Start with a free account, no credit card.

Download this list →

Related lists

Water resources management companies by geography

Browse the directory

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.