Company lists · Data refreshed September 2026

Top 25 Reverse osmosis plant construction companies based in South Africa

Name: Reverse osmosis plant construction companies based in South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 83 companies tracked

RevenueBase identified 83 reverse osmosis plant construction companies headquartered in South Africa as of September 2026 and tracks 1,193 professional contacts across them, including 314 with verified work emails. Johannesburg is the largest hub.

This list covers reverse osmosis plant construction 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 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

83Companies

1,193Contacts tracked

314Verified emails

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The 25 largest reverse osmosis plant construction companies based in South Africa

Ranked by team size

Top 25 of 83 reverse osmosis plant construction companies based in South Africa, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to reverse osmosis plant construction 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	Nafasi Water	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	201-500	175 contacts →
	Indirect 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 16, 2026
2	Watercare Innovations	Partial evidence	Randfontein, South AfricaHQ checked Sep 16, 2026	201-500	165 contacts →
	Partial evidence “Watercare Innovations is a water purification supplier, delivering tailor-made solutions in the fields of water treatment chemicals, and engineered plants such as potable and…” Source: RevenueBase Database · checked Sep 16, 2026
3	Tecroveer	Indirect evidence	Westonaria, South AfricaHQ checked Sep 16, 2026	201-500	86 contacts →
	Indirect evidence “Tecroveer Holdings: Revolutionising Water Treatment Since 1976 Mission: We Clean Water.” Source: RevenueBase Database · checked Sep 16, 2026
4	Empa Structures	Strong evidence	Durbanville, South AfricaHQ checked Sep 16, 2026	201-500	83 contacts →
	Strong evidence “We offer expertise over the entire spectrum of civil engineering construction with it’s main focus on construction of water treatment plants, waste water treatment plants…” Source: RevenueBase Database · checked Sep 16, 2026
5	Watericon	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	51-200	51 contacts →
	Indirect 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 16, 2026
6	Alveo Water PTY LTD	Partial evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	51-200	36 contacts →
	Partial evidence “We specialise in the design, manufacturing, installation, and operation of advanced water and wastewater treatment plants.” Source: RevenueBase Database · checked Sep 16, 2026
7	Puritech Water Treatment	Indirect evidence	Midrand, South AfricaHQ checked Sep 16, 2026	11-50	32 contacts →
	Indirect evidence “We are based in the heart of Johannesburg, the land of Gold.” Source: RevenueBase Database · checked Sep 16, 2026
8	Aquamat Engineering Solutions	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	11-50	31 contacts →
	Indirect evidence “Aquamat, established in 1968 active in 33 African Countries.” Source: RevenueBase Database · checked Sep 16, 2026
9	Kainos Projects Africa	Indirect evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	11-50	28 contacts →
	Indirect 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 16, 2026
10	Kampwater	Indirect evidence	Stellenbosch, South AfricaHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “Kampwater is a market leader in the engineering of robust, scalable water purification systems.” Source: RevenueBase Database · checked Sep 16, 2026
11	Prosep PTY LTD	Indirect evidence	Boksburg, South AfricaHQ checked Sep 16, 2026	51-200	18 contacts →
	Indirect evidence “Welcome to Prosep, a premier leader in the water treatment industry with over 20 years of experience.” Source: RevenueBase Database · checked Sep 16, 2026
12	Aqua Aero Vitae	Partial evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	1-10	15 contacts →
	Partial evidence “Aqua Aero Vitae (A2V) are specialists in water and efflluent treatment plants and air filtration systems.” Source: RevenueBase Database · checked Sep 16, 2026
13	QFS	Partial evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	11-50	14 contacts →
	Partial evidence “QFS have the capability to design, manufacture, install, commissioning and maintain membrane plants and general water treatment equipment in South Africa.” Source: RevenueBase Database · checked Sep 16, 2026
14	Water Analytical Services	Indirect evidence	Middleburg, South AfricaHQ checked Sep 16, 2026	51-200	13 contacts →
	Indirect evidence “Water Analytical Services (WAS) was formed in November The founder and director, Stephan van der Merwe, established the company with a specific focus on the coal, iron and steel…” Source: RevenueBase Database · checked Sep 16, 2026
15	Lektratek Water Technology	Indirect evidence	Potchefstroom, South AfricaHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “LWT offers a complete range of mechanical equipment with in-house capabilities from design, manufacture, installation and commissioning for sewage, water treatment & industrial…” Source: RevenueBase Database · checked Sep 16, 2026
16	Malutsa PTY LTD	Indirect evidence	Wellington, South AfricaHQ checked Sep 16, 2026	51-200	11 contacts →
	Indirect evidence “Malutsa is one of the leading providers of water treatment technology in Sub-Saharan Africa.” Source: RevenueBase Database · checked Sep 16, 2026
17	AR Africa	Indirect evidence	Sebenza, South AfricaHQ checked Sep 16, 2026	1-10	10 contacts →
	Indirect evidence “AR Africa is a water treatment product provider for the Southern African market.” Source: RevenueBase Database · checked Sep 16, 2026
18	Telos Water	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	1-10	9 contacts →
	Indirect 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 16, 2026
19	Greenchain Group	Indirect evidence	Strand, South AfricaHQ checked Sep 16, 2026	11-50	9 contacts →
	Indirect evidence “Leaders in innovative & sustainable water treatment solutions Greenchain Group provides advanced, custom-designed water treatment solutions using cutting-edge membrane technology…” Source: RevenueBase Database · checked Sep 16, 2026
20	Clarity	Indirect evidence	Pretoria, South AfricaHQ checked Sep 16, 2026	11-50	9 contacts →
	Indirect evidence “Clarity Installations (Pty) Ltd is a proudly South African leader in water engineering, delivering innovative and sustainable water and wastewater solutions since 2010.” Source: RevenueBase Database · checked Sep 16, 2026
21	Reflekt Water	Indirect evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	11-50	7 contacts →
	Indirect evidence “Established in 2021, REFLEKT WATER is led by three engineers - Marco Kritzinger, Francois Smuts, and James Whitehead.” Source: RevenueBase Database · checked Sep 16, 2026
22	Regional Waste Water	Indirect evidence	Port Elizabeth, South AfricaHQ checked Sep 16, 2026	1-10	7 contacts →
	Indirect evidence “Regional Waste Water is a process water treatment specialist company.” Source: RevenueBase Database · checked Sep 16, 2026
23	Puraplan PTY LTD	Indirect evidence	Durban, South AfricaHQ checked Sep 16, 2026	1-10	6 contacts →
	Indirect evidence “PuraPlan is a design and project services company focusing on water and wastewater treatment.” Source: RevenueBase Database · checked Sep 16, 2026
24	Enaqua PTY LTD	Strong evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	11-50	6 contacts →
	Strong evidence “Enaqua - Specialist water engineering solutions We design, deliver and consult on specialised water treatment plants focusing mainly on UV, Chlorine Dioxide & Reverse Osmosis…” Source: RevenueBase Database · checked Sep 16, 2026
25	Ulmo Water PTY LTD	Indirect evidence	Somerset West, South AfricaHQ checked Sep 16, 2026	11-50	6 contacts →
	Indirect evidence “Ulmo Water is an EPC and Design Build contractor focusing on turnkey solutions in the water and wastewater treatment industry.” 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: reverse osmosis plant construction 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 reverse osmosis plant construction companies.
Partial evidence: Its own public description names part of reverse osmosis plant construction companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name reverse osmosis plant construction 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 83 reverse osmosis plant construction companies based in South Africa

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Reverse osmosis plant construction companies based in South Africa at a glance

As of Sep 16, 2026

26.3%Verified-email coverage

14.4Average contacts per company

11-50Median size (employees)

18.1%Largest-city concentration · Johannesburg

Sep 16, 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 South Africa, so it is reported there. Company counts and contact totals on this page are exact for South Africa, over 83 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 reverse osmosis plant construction 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 “reverse osmosis plant construction 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 reverse osmosis plant construction 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 reverse osmosis plant construction 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, 314 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 reverse osmosis plant construction 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 reverse osmosis plant construction companies are there based in South Africa?

RevenueBase identified 83 reverse osmosis plant construction 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?

Nafasi Water, headquartered in Johannesburg, tops this list with the largest team on record.

Which city has the most reverse osmosis plant construction companies?

Johannesburg leads with 15 headquartered companies, followed by Cape Town (13) and Pretoria (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 314 verified decision-maker contacts tracked across these 83 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.