Company lists · Data refreshed September 2026

Top 25 On-site water treatment system contractors based in Norway

Name: On-site water treatment system contractors based in Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 40 companies tracked

RevenueBase identified 40 company matches for on-site water treatment system contractors associated with Norway as of September 2026 and tracks 413 professional contacts across them, including 160 with verified work emails. Oslo is the largest hub.

This list covers company matches for on-site water treatment system contractors associated with Norway, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

40Companies

413Contacts tracked

160Verified emails

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The 25 largest on-site water treatment system contractors based in Norway

Ranked by team size

Top 25 of 40 company matches for on-site water treatment system contractors based in Norway, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Eliquo PMI	Exact match	Sandefjord, NorwayHQ recorded Sep 17, 2026	201-500	81 contacts →
	Exact match “ELIQUO PMI is one of Norway's leading contractors in the design and construction of plants for water and wastewater treatment, district heating, district cooling and process…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Alfsen OG Gunderson AS	Exact match	Oslo, NorwayHQ recorded Sep 17, 2026	51-200	40 contacts →
	Exact match “Vi mener alvor med vårt slogan "For et renere miljø".” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Salsnes Filter	Exact match	Namsos, NorwayHQ recorded Sep 17, 2026	11-50	22 contacts →
	Exact match “Salsnes Filter’s patented filter technology for wastewater treatment and effluent treatment is leading the Norwegian market in municipal primary treatment.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Nordisk Vannteknikk AS	Exact match	Drammen, NorwayHQ recorded Sep 17, 2026	11-50	18 contacts →
	Exact match “Nordisk Vannteknikk er en totalleverandør av renseteknologi for behandling av forurenset vann.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	M Vest Water	Exact match	Bergen, NorwayHQ recorded Sep 17, 2026	11-50	16 contacts →
	Exact match “M Vest Water is a system and solution provider of clean and safe water.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Onsite Treatment Services	Exact match	Tananger, NorwayHQ recorded Sep 17, 2026	11-50	14 contacts →
	Exact match “OTS offers a large and modern rental fleet, water treatment, slop treatment, tank cleaning, filtration, cuttings handling, vacuum systems, mud skips, well service pumps, pumping…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Doscon AS	Exact match	Økern, NorwayHQ recorded Sep 17, 2026	11-50	13 contacts →
	Exact match “DOSCON is an innovative company working with environmental and industrial process analytics.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Klart Vann AS	Exact match	Sandnes, NorwayHQ recorded Sep 17, 2026	11-50	11 contacts →
	Exact match “Totalleverandør av vannbehandling Klart Vann har siden 2006 levert rene, trygge og effektive vannløsninger til kunder over hele Norge.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	BWT Norge	Exact match	Oslo, NorwayHQ recorded Sep 17, 2026	11-50	11 contacts →
	Exact match “BWT Birger Christensen AS ble startet i 1928 og er blant Nordens førende virksomheter innen vannbehandlingsanlegg.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Ceva AS	Exact match	Oslo, NorwayHQ recorded Sep 17, 2026	11-50	11 contacts →
	Exact match “CEVA AS er en tverrfaglig servicebedrift som tilbyr rørleggertjenester, tekniske servicekontroller og vannbehandling til det offentlige, private og næringsbygg.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Norwegian Technology	Exact match	Mekjarvik, NorwayHQ recorded Sep 17, 2026	11-50	10 contacts →
	Exact match “We provide services for the development of sustainable waste treatment solutions for offshore and onshore industry and municipal applications using proprietary treatment…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Vitek Miljø	Exact match	Rådal, NorwayHQ recorded Sep 17, 2026	11-50	9 contacts →
	Exact match “Vitek Miljø AS er en landsdekkende totalleverandør av tjenester innen vann og avløpssystemer.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Global Concept Mitco AS	Exact match	Oslo, NorwayHQ recorded Sep 17, 2026	11-50	8 contacts →
	Exact match “Global Concept MITCO AS (tidligere Industrikjemikalier MITCO AS) bygger på mer enn 40 års erfaring innen fagområdet industriell vannbehandling.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Normex	Exact match	Ålesund, NorwayHQ recorded Sep 17, 2026	1-10	8 contacts →
	Exact match “We deliver the best possible quality solutions for water treatment and disinfection.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Vulkan Engineering	Exact match	Oslo, NorwayHQ recorded Sep 17, 2026	1-10	6 contacts →
	Exact match “Vulkan Engineering AS is a leader in advanced seawater treatment systems and specialized engineering services to the international offshore industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Slamrensing AS	Exact match	Revetal, NorwayHQ recorded Sep 17, 2026	1-10	6 contacts →
	Exact match “Vannrensing- og sedimenteringsselskap med høyt fokus på miljø.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Ennox Technology	Exact match	Stavanger, NorwayHQ recorded Sep 17, 2026	11-50	6 contacts →
	Exact match “Ennox Technology delivers customized technological solutions for water treatment, oil recovery, waste management, and soil remediation, helping industries optimize efficiency and…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Cevia Solutions	Exact match	Spikkestad, NorwayHQ recorded Sep 17, 2026	1-10	4 contacts →
	Exact match “Engineering services, products for water treatment, process industry etc.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Avavi AS	Exact match	Ås, NorwayHQ recorded Sep 17, 2026	11-50	4 contacts →
	Exact match “Tjenester innen vann & avløp” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Mivanor AS	Exact match	Sandnes, NorwayHQ recorded Sep 17, 2026	1-10	4 contacts →
	Exact match “We provide an innovative, self-developed solution for treating industrial waste water.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Scandinavian Water Technology AS	Exact match	Oppegaard, NorwayHQ recorded Sep 17, 2026	1-10	4 contacts →
	Exact match “Appropriate Water Solutions Scandinavian Water Technology AS (Scanwater) has been a supplier to the water and wastewater sector since 1985 and has extensive experience, excellent…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Norsk Miljøservice AS	Exact match	Sykkylven, NorwayHQ recorded Sep 17, 2026	11-50	3 contacts →
	Exact match “Norsk Miljøservice AS er lokalisert på Nord-Vestlandet med en avdeling i Drammen.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Prominent Norge	Exact match	Drammen, NorwayHQ recorded Sep 17, 2026	1-10	2 contacts →
	Exact match “Vi skal være en pålitelig partner innen kjemikaliehåndtering og vannbehandling ved å tilby våre kunder komponenter samt systemer og service.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Odin Maskin AS	Exact match	Gressvik, NorwayHQ recorded Sep 17, 2026	11-50	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Unik Filtersystem AS	Exact match	Os, NorwayHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match “Our water treatment plants are built on innovative and environmentally conscious technology.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “on-site water treatment system contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 40 on-site water treatment system contractors based in Norway

See the full list, filter by size, metro and specialty, and access 160 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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On-site water treatment system contractors based in Norway at a glance

As of Sep 17, 2026

38.7%Verified-email coverage

10.3Average contacts per company

11-50Median size (employees)

15.0%Largest-city concentration · Oslo

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Norway, so it is reported there. Company counts and contact totals on this page are exact for Norway, over 40 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Norway whose business descriptions match “on-site water treatment system contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 160 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “on-site water treatment system contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many on-site water treatment system contractors are there based in Norway?

RevenueBase identified 40 company matches for on-site water treatment system contractors associated with Norway as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Eliquo PMI tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most on-site water treatment system contractors?

Oslo leads with 6 company records, followed by Drammen (3) and Sandefjord (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 160 professional contacts with verified work emails tracked across these 40 companies; direct dials are available where recorded.

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 SmartSearch, 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.