Company lists · Data refreshed September 2026

Top 25 Wastewater engineering companies based in South Africa

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 168 companies tracked

RevenueBase identified 168 wastewater engineering companies headquartered in South Africa as of September 2026 and tracks 2,727 professional contacts across them, including 855 with verified work emails. Johannesburg is the largest hub.

This list covers wastewater engineering 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 19, 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 19, 2026 86% judged on-target in blind review

168Companies

2,727Contacts tracked

855Verified emails

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The 25 largest wastewater engineering companies based in South Africa

Ranked by team size

Top 25 of 168 wastewater engineering companies based in South Africa, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to wastewater engineering 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	Proxa Water	Indirect evidence	Woodmead, South AfricaHQ checked Sep 19, 2026	201-500	358 contacts →
	Indirect evidence “Proxa is a leading water treatment specialist whose integrated services cover the entire water cycle and span numerous global industries, including: mining, food & beverage…” Source: RevenueBase Database · checked Sep 19, 2026
2	ERWAT	Indirect evidence	Kempton Park, South AfricaHQ checked Sep 19, 2026	501-1,000	270 contacts →
	Indirect 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 19, 2026
3	Talbot	Indirect evidence	Durban, South AfricaHQ checked Sep 19, 2026	51-200	202 contacts →
	Indirect 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 19, 2026
4	Nafasi Water	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 19, 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 19, 2026
5	Watercare Innovations	Indirect evidence	Randfontein, South AfricaHQ checked Sep 19, 2026	201-500	165 contacts →
	Indirect 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 19, 2026
6	Tecroveer	Indirect evidence	Westonaria, South AfricaHQ checked Sep 19, 2026	201-500	86 contacts →
	Indirect evidence “Tecroveer Holdings: Revolutionising Water Treatment Since 1976 Mission: We Clean Water.” Source: RevenueBase Database · checked Sep 19, 2026
7	Empa Structures	Partial evidence	Durbanville, South AfricaHQ checked Sep 19, 2026	201-500	83 contacts →
	Partial 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 19, 2026
8	WEC Water	Partial evidence	Johannesburg, South AfricaHQ checked Sep 19, 2026	51-200	57 contacts →
	Partial evidence “WEC Water is an EPC contractor in the water and wastewater treatment sector.” Source: RevenueBase Database · checked Sep 19, 2026
9	Watericon	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 19, 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 19, 2026
10	WRP Consulting Engineers	Partial evidence	Groenkloof, South AfricaHQ checked Sep 19, 2026	11-50	37 contacts →
	Partial evidence “WRP is a proudly level 2 BB-BEE specialist engineering consultancy founded and cultivated in South Africa.” Source: RevenueBase Database · checked Sep 19, 2026
11	Alveo Water PTY LTD	Partial evidence	Cape Town, South AfricaHQ checked Sep 19, 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 19, 2026
12	Sewtreat	Indirect evidence	Pretoria, South AfricaHQ checked Sep 19, 2026	51-200	30 contacts →
	Indirect evidence “SewTreat (Pty) Ltd is a renowned South African company with a global reputation for delivering exceptional water management solutions across diverse sectors.” Source: RevenueBase Database · checked Sep 19, 2026
13	Aquest Colsen PTY LTD	Indirect evidence	Port Elizabeth, South AfricaHQ checked Sep 19, 2026	11-50	28 contacts →
	Indirect evidence “In our group we have developed a number of technologies in water treatment, energy (biogas) production and nutrient recovery.” Source: RevenueBase Database · checked Sep 19, 2026
14	Kainos Projects Africa	Indirect evidence	Cape Town, South AfricaHQ checked Sep 19, 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 19, 2026
15	Pro-Plan Consulting Engineers	Indirect evidence	Noordheuwel, South AfricaHQ checked Sep 19, 2026	51-200	24 contacts →
	Indirect 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 19, 2026
16	Water And Sanitation Services South Africa Proprietary Limited	Indirect evidence	Sandton, South AfricaHQ checked Sep 19, 2026	1-10	23 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
17	S.A.M.E. Water	Indirect evidence	Alberton, South AfricaHQ checked Sep 19, 2026	51-200	22 contacts →
	Indirect evidence “The S.A.M.E.” Source: RevenueBase Database · checked Sep 19, 2026
18	Prosep PTY LTD	Indirect evidence	Boksburg, South AfricaHQ checked Sep 19, 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 19, 2026
19	Aqua Aero Vitae	Indirect evidence	Cape Town, South AfricaHQ checked Sep 19, 2026	1-10	15 contacts →
	Indirect evidence “Aqua Aero Vitae (A2V) are specialists in water and efflluent treatment plants and air filtration systems.” Source: RevenueBase Database · checked Sep 19, 2026
20	Hidro-Tech Systems	Strong evidence	Cape Town, South AfricaHQ checked Sep 19, 2026	11-50	14 contacts →
	Strong evidence “Hidro-Tech is a leading water and wastewater treatment engineering firm.” Source: RevenueBase Database · checked Sep 19, 2026
21	QFS	Indirect evidence	Cape Town, South AfricaHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect 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 19, 2026
22	Lektratek Water Technology	Indirect evidence	Potchefstroom, South AfricaHQ checked Sep 19, 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 19, 2026
23	Zana Manzi Services	Partial evidence	Johannesburg, South AfricaHQ checked Sep 19, 2026	501-1,000	12 contacts →
	Partial evidence “Zana Manzi Services specialises in the management, construction, refurbishment, operation and maintenance of water and wastewater systems.” Source: RevenueBase Database · checked Sep 19, 2026
24	Arquero Technical Support	Strong evidence	Johannesburg, South AfricaHQ checked Sep 19, 2026	11-50	11 contacts →
	Strong evidence “ARQUERO® provides professional engineering consulting services for HVAC Design, Plumbing & Drainage, Electrical, Fire Protection Systems and Water & Wastewater Treatment Systems…” Source: RevenueBase Database · checked Sep 19, 2026
25	Biocure	Indirect evidence	Cape Town, South AfricaHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “At BioCure, we believe every environment should feel fresh, clean, and responsibly managed.” Source: RevenueBase Database · checked Sep 19, 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: wastewater engineering 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 wastewater engineering companies.
Partial evidence: Its own public description names part of wastewater engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name wastewater engineering 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 168 wastewater engineering companies based in South Africa

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Wastewater engineering companies based in South Africa at a glance

As of Sep 19, 2026

31.4%Verified-email coverage

16.2Average contacts per company

11-50Median size (employees)

14.3%Largest-city concentration · Johannesburg

Sep 19, 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 168 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 wastewater engineering 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 “wastewater engineering 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 wastewater engineering 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 wastewater engineering 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, 855 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 19, 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 wastewater engineering 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 wastewater engineering companies are there based in South Africa?

RevenueBase identified 168 wastewater engineering 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?

Proxa Water, headquartered in Woodmead, tops this list with the largest team on record.

Which city has the most wastewater engineering companies?

Johannesburg leads with 24 headquartered companies, followed by Cape Town (19) and Durban (10).

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 855 verified decision-maker contacts tracked across these 168 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 19, 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.