Company lists · Data refreshed September 2026

Top 25 Sewer contractors based in Switzerland

Name: Sewer contractors based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 87 companies tracked

RevenueBase identified 87 sewer contractors headquartered in Switzerland as of September 2026 and tracks 409 professional contacts across them, including 110 with verified work emails. Zurich is the largest hub.

This list covers sewer contractors headquartered in Switzerland, 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 17, 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 17, 2026 86% judged on-target in blind review

87Companies

409Contacts tracked

110Verified emails

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The 25 largest sewer contractors based in Switzerland

Ranked by team size

Top 25 of 87 sewer contractors based in Switzerland, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to sewer contractors: 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	Liaudet Pial SA	Indirect evidence	Renens, SwitzerlandHQ checked Sep 17, 2026	51-200	45 contacts →
	Indirect evidence “Grâce à un personnel hautement qualifié, motivé et formé aux dernières techniques d’assainissement, ainsi qu’à du matériel moderne, innovant et performant, Liaudet Pial SA se…” Source: RevenueBase Database · checked Sep 17, 2026
2	Josef Muff AG	Indirect evidence	Sarmenstorf, SwitzerlandHQ checked Sep 17, 2026	51-200	22 contacts →
	Indirect evidence “Wir sorgen dafür, dass alles dorthin fliesst, wo es soll – sicher und ohne Verluste.” Source: RevenueBase Database · checked Sep 17, 2026
3	Kanalservice Gruppe	Indirect evidence	Winterthur, SwitzerlandHQ checked Sep 17, 2026	1,001-5,000	20 contacts →
	Indirect evidence “Die Kanalservice Gruppe (KSG) ist ein schnell wachsender und führender Komplettanbieter im Bereich der Instandhaltung von kritischen Infrastrukturen in Europa.” Source: RevenueBase Database · checked Sep 17, 2026
4	Fretz Kanal-Service AG	Indirect evidence	Cham, SwitzerlandHQ checked Sep 17, 2026	51-200	17 contacts →
	Indirect evidence “Seit 1954 besteht das Unternehmen, das einst von der Familie Walter Fretz gegründet wurde.” Source: RevenueBase Database · checked Sep 17, 2026
5	Hächler-Reutlinger AG	Indirect evidence	Wettingen, SwitzerlandHQ checked Sep 17, 2026	11-50	15 contacts →
	Indirect evidence “Mit unseren Unternehmen sind wir Profis rund um den Unterhalt und die Sanierung von Kanalisationen, der Reinigung und Instandhaltung von Flächen sowie der Reinigung von…” Source: RevenueBase Database · checked Sep 17, 2026
6	Ernefant AG	Indirect evidence	Laufenburg, SwitzerlandHQ checked Sep 17, 2026	11-50	11 contacts →
	Indirect evidence “ERNEFANT AG - Ihr Partner für Saugbagger-Leistungen in der Schweiz Die Einsatzgebiete unserer Saugbagger sind fast grenzenlos: Im Hoch- und Tiefbau sowie beim Unterhalt von…” Source: RevenueBase Database · checked Sep 17, 2026
7	KFS Kanal-Service AG	Indirect evidence	Oensingen, SwitzerlandHQ checked Sep 17, 2026	51-200	10 contacts →
	Indirect evidence “Willkommen bei KFS Kanal-Service AG!” Source: RevenueBase Database · checked Sep 17, 2026
8	Kibag Entwässerungstechnologie AG	Indirect evidence	Fallanden, SwitzerlandHQ checked Sep 17, 2026	51-200	9 contacts →
	Indirect evidence “KIBAG Kanaldienstleistungen.” Source: RevenueBase Database · checked Sep 17, 2026
9	Asa-Service AG	Indirect evidence	St.gallen, SwitzerlandHQ checked Sep 17, 2026	11-50	8 contacts →
	Indirect evidence “Die ASA-Service AG ist ein führender Ostschweizer Anbieter für folgende Bereiche:Kanal- und Rohrreinigung / Mobiltoiletten-Service / Container-Service / PE-VorfabrikationKanal-…” Source: RevenueBase Database · checked Sep 17, 2026
10	Marquis AG Kanalservice	Indirect evidence	Füllinsdorf, SwitzerlandHQ checked Sep 17, 2026	51-200	8 contacts →
	Indirect evidence “Die Marquis AG Kanalservice ist ein traditionelles Familienunternehmen aus der Nordwestschweiz, welches sich im Laufe der Jahre zum führenden Anbieter im Bereich der…” Source: RevenueBase Database · checked Sep 17, 2026
11	Kanaltec AG	Indirect evidence	Balgach, SwitzerlandHQ checked Sep 17, 2026	11-50	8 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
12	Ersotech AG	Indirect evidence	Luzern, SwitzerlandHQ checked Sep 17, 2026	51-200	6 contacts →
	Indirect evidence “Wir sind Ihr kompetenter Partner für alle Fragen rund um die Kanalreinigung und Kanalsanierung.” Source: RevenueBase Database · checked Sep 17, 2026
13	RS Technik AG	Indirect evidence	Basel, SwitzerlandHQ checked Sep 17, 2026	11-50	6 contacts →
	Indirect evidence “Die RS Technik AG ist einer der führenden Anbieter von Systemen zur grabenlosen Sanierung im Abwasserbereich und greift auf langjährige Erfahrungen in der Entwicklung und…” Source: RevenueBase Database · checked Sep 17, 2026
14	Esslinger AG	Indirect evidence	Wangen-brüttisellen, SwitzerlandHQ checked Sep 17, 2026	51-200	6 contacts →
	Indirect evidence “Wir bauen mit Charkter.” Source: RevenueBase Database · checked Sep 17, 2026
15	Selhofer AG	Indirect evidence	Oberentfelden, SwitzerlandHQ checked Sep 17, 2026	11-50	6 contacts →
	Indirect evidence “Ein längeres Leben für Ihre Abwasserrohre.” Source: RevenueBase Database · checked Sep 17, 2026
16	Otto Rohrunterhalt Gmbh	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 17, 2026	11-50	5 contacts →
	Indirect evidence “Seit über 30 Jahren lösen wir ihre kleinen und grossen Probleme im Bereich von Abwasser und Lüftungsrohren.” Source: RevenueBase Database · checked Sep 17, 2026
17	Rohrputz-Loriol AG Kanalservice	Indirect evidence	Spreitenbach, SwitzerlandHQ checked Sep 17, 2026	51-200	5 contacts →
	Indirect evidence “Die Rohrputz-Loriol AG mit Standorten in Spreitenbach (Kanton Aargau) und Dulliken (Kanton Solothurn) ist ein langjährig, etabliertes Kanalserviceunternehmen.” Source: RevenueBase Database · checked Sep 17, 2026
18	Rohrgroup Schweiz AG	Indirect evidence	Altenrhein, SwitzerlandHQ checked Sep 17, 2026	1-10	5 contacts →
	Indirect evidence “Moderne Rohrinnensanierung für Abwasserrohre in Mehrfamilienhäuser, Krankenhäuser, Reha-Kliniken, Hotelketten und anderen gewerblichen Immobilien - Geruchsneutral, Sauber…” Source: RevenueBase Database · checked Sep 17, 2026
19	ABAG	Indirect evidence	Arbon, SwitzerlandHQ checked Sep 17, 2026	11-50	4 contacts →
	Indirect evidence “Seit über 20 Jahren unterstützen wir mit knapp 50 ständig geschulten und erfahrenen Mitarbeiter:innen, sowie mit unseren modernen Spezialgeräten unsere Kundschaft im Bereich des…” Source: RevenueBase Database · checked Sep 17, 2026
20	Arnold Pfister AG	Indirect evidence	Schönenberg Zh, SwitzerlandHQ checked Sep 17, 2026	11-50	4 contacts →
	Indirect evidence “ÜBER UNS 365 Tage rund um die Uhr ist die Firma Arnold Pfister AG Kanalreinigung und Entsorgung mit ihren Mitarbeitern für ihre Kunden im Einsatz.” Source: RevenueBase Database · checked Sep 17, 2026
21	Zwicky Kanalreinigungen AG	Indirect evidence	Hinwil, SwitzerlandHQ checked Sep 17, 2026	1-10	4 contacts →
	Indirect evidence “Wir, die Zwicky Kanalreinigungen AG mit Sitz in Bäretswil ZH, sind im Bereich der Kanalreinigung tätig.” Source: RevenueBase Database · checked Sep 17, 2026
22	Ducret Frères SA	Indirect evidence	Corsier-sur-vevey, SwitzerlandHQ checked Sep 17, 2026	11-50	3 contacts →
	Indirect evidence “Avec une équipe qualifiée, engagée et équipée d’un matériel moderne, Ducret Frères SA met son expertise au service de l’assainissement et de l’entretien des canalisations sur la…” Source: RevenueBase Database · checked Sep 17, 2026
23	TPS Trenchless Piping Systems AG	Indirect evidence	Hohentannen, SwitzerlandHQ checked Sep 17, 2026	1-10	3 contacts →
	Indirect evidence “Die TPS (Trenchless Piping System) AG bietet Rohrerneuerung mittels Berstlining an.” Source: RevenueBase Database · checked Sep 17, 2026
24	Pfenniger Entsorgungs AG	Indirect evidence	Sursee, SwitzerlandHQ checked Sep 17, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
25	EX Team AG Kanalservices	Indirect evidence	Basel, SwitzerlandHQ checked Sep 17, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 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: sewer contractors. 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 sewer contractors.
Partial evidence: Its own public description names part of sewer contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sewer contractors. 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 87 sewer contractors based in Switzerland

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Sewer contractors based in Switzerland at a glance

As of Sep 17, 2026

26.9%Verified-email coverage

4.7Average contacts per company

1-10Median size (employees)

8.0%Largest-city concentration · Zurich

Sep 17, 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 Switzerland, so it is reported there. Company counts and contact totals on this page are exact for Switzerland, over 87 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 sewer contractors, 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 Switzerland whose own description of what they do matches “sewer contractors”. 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 sewer contractors), 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 sewer contractors, and records with no verified work email. Companies headquartered outside Switzerland 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, 110 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 17, 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 sewer contractors, 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 sewer contractors are there based in Switzerland?

RevenueBase identified 87 sewer contractors headquartered in Switzerland 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?

Liaudet Pial SA, headquartered in Renens, tops this list with the largest team on record.

Which city has the most sewer contractors?

Zurich leads with 7 headquartered companies, followed by Spreitenbach (3) and Henggart (2).

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 110 verified decision-maker contacts tracked across these 87 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 17, 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.