Company lists · Data refreshed September 2026

Top 25 Wastewater engineering companies based in New Zealand

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 54 companies tracked

RevenueBase identified 54 wastewater engineering companies headquartered in New Zealand as of September 2026 and tracks 433 professional contacts across them, including 205 with verified work emails. Auckland is the largest hub.

This list covers wastewater engineering companies headquartered in New Zealand, 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

54Companies

433Contacts tracked

205Verified emails

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The 25 largest wastewater engineering companies based in New Zealand

Ranked by team size

Top 25 of 54 wastewater engineering companies based in New Zealand, 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	Filtec LTD	Partial evidence	Mt Wellington, New ZealandHQ checked Sep 19, 2026	51-200	86 contacts →
	Partial evidence “FILTEC - Making Water Safer Experts in supplying and servicing water and wastewater treatment systems.” Source: RevenueBase Database · checked Sep 19, 2026
2	LUTRA	Partial evidence	Lower Hutt, New ZealandHQ checked Sep 19, 2026	11-50	44 contacts →
	Partial evidence “Established in 2006, Lutra are a team of water and wastewater specialist solutions providers with a team of over 39 spread throughout New Zealand.” Source: RevenueBase Database · checked Sep 19, 2026
3	Devan Plastics Limited	Indirect evidence	Tauranga, New ZealandHQ checked Sep 19, 2026	51-200	18 contacts →
	Indirect evidence “We manufacture and design Water and Waste Water Solutions for the Urban, Rural and Commercial Market.” Source: RevenueBase Database · checked Sep 19, 2026
4	Sitecare	Indirect evidence	Taupo, New ZealandHQ checked Sep 19, 2026	51-200	15 contacts →
	Indirect evidence “For over 25 years, SiteCare has been a prominent national leader in providing a diverse range of environmental and industrial services.” Source: RevenueBase Database · checked Sep 19, 2026
5	HAL Consulting LTD	Strong evidence	Parnell, New ZealandHQ checked Sep 19, 2026	11-50	12 contacts →
	Strong evidence “HAL Consulting Ltd (HAL) is a niche engineering consultancy that specialises in wastewater, stormwater and water supply network modelling and strategic planning, and data…” Source: RevenueBase Database · checked Sep 19, 2026
6	SWE Southern Water Engineering	Partial evidence	Blenheim, New ZealandHQ checked Sep 19, 2026	11-50	12 contacts →
	Partial evidence “SWE (Southern Water Engineering) is a leading Marlborough-based engineering company specialising in water engineering, electrical and automation solutions, and pumping technology.” Source: RevenueBase Database · checked Sep 19, 2026
7	Bellcon Limited	Strong evidence	Ruakaka, New ZealandHQ checked Sep 19, 2026	11-50	12 contacts →
	Strong evidence “We’re proud to be a construction company delivering project management, engineering, and commissioning services for water and wastewater infrastructure.” Source: RevenueBase Database · checked Sep 19, 2026
8	Innoflow Technologies NZ Limited	Partial evidence	Dairy Flat, New ZealandHQ checked Sep 19, 2026	11-50	10 contacts →
	Partial evidence “Wastewater treatment, Community Pressure Sewers, Wastewater Design, Build & Operate.” Source: RevenueBase Database · checked Sep 19, 2026
9	Ecoflow LTD	Partial evidence	Auckland, New ZealandHQ checked Sep 19, 2026	11-50	10 contacts →
	Partial evidence “Ecoflow are NZ’s Pressure Sewer Experts – pressure sewer is all we do You’ll find we’re passionate about reducing the risk of wastewater entering New Zealand’s beaches and…” Source: RevenueBase Database · checked Sep 19, 2026
10	CST Group LTD	Indirect evidence	Cambridge, New ZealandHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “CST Group Ltd is family-owned company based in the Waikato that has been operating since the 1990’s.” Source: RevenueBase Database · checked Sep 19, 2026
11	Wavelength Water LTD	Indirect evidence	East Tamaki, New ZealandHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “Wavelength Water provides water treatment expertise and complete systems to achieve the water quality you need.” Source: RevenueBase Database · checked Sep 19, 2026
12	DEECO	Indirect evidence	Alicetown, New ZealandHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “Founded in 1938, Deeco Services Limited combines the best from tradition, experience and modern management.” Source: RevenueBase Database · checked Sep 19, 2026
13	Mason Engineers NZ LTD	Partial evidence	East Tamaki, New ZealandHQ checked Sep 19, 2026	11-50	9 contacts →
	Partial evidence “Mason Engineers (NZ) Limited is a company whose name has been synonymous with engineering in New Zealand for more than seventy years.” Source: RevenueBase Database · checked Sep 19, 2026
14	Brickhouse Technologies	Indirect evidence	Hamilton, New ZealandHQ checked Sep 19, 2026	1-10	8 contacts →
	Indirect evidence “From helping local authorities manage their municipal water treatment systems through to providing bespoke solutions for meat, dairy, food processing, and industrial clients…” Source: RevenueBase Database · checked Sep 19, 2026
15	Oasis Clearwater Environmental Systems	Partial evidence	Rolleston, New ZealandHQ checked Sep 19, 2026	11-50	7 contacts →
	Partial evidence “Oasis Clearwater are a leading manufacturer of onsite wastewater treatment systems.” Source: RevenueBase Database · checked Sep 19, 2026
16	NEO Consulting	Indirect evidence	Newmarket, New ZealandHQ checked Sep 19, 2026	11-50	6 contacts →
	Indirect evidence “We came from golden beginnings, being born from too much success and rapid growth.” Source: RevenueBase Database · checked Sep 19, 2026
17	Hopper Construction LTD	Indirect evidence	Orewa, New ZealandHQ checked Sep 19, 2026	51-200	6 contacts →
	Indirect evidence “Hopper Construction is an established civil construction company located in Orewa, Auckland.” Source: RevenueBase Database · checked Sep 19, 2026
18	Hydroflux NZ	Partial evidence	Auckland, New ZealandHQ checked Sep 19, 2026	51-200	5 contacts →
	Partial evidence “Hydroflux is a sustainability driven organisation delivering unrivalled engineering, scientific and technological solutions for a more secure future, with a focus on water…” Source: RevenueBase Database · checked Sep 19, 2026
19	Austin Bluewater	Indirect evidence	Christchurch, New ZealandHQ checked Sep 19, 2026	11-50	5 contacts →
	Indirect evidence “We are a proven leader with over 25 years hands-on experience designing and manufacturing waste water treatment systems.” Source: RevenueBase Database · checked Sep 19, 2026
20	Jonassen Industrial Projects Limited	Strong evidence	Auckland, New ZealandHQ checked Sep 19, 2026	1-10	5 contacts →
	Strong evidence “Jonassen Industrial Projects Limited are consultants in process engineering, industrial oven design, heating and drying systems, wastewater threatment plants and de-watering…” Source: RevenueBase Database · checked Sep 19, 2026
21	Allflow NZ	Indirect evidence	Richmond, New ZealandHQ checked Sep 19, 2026	1-10	5 contacts →
	Indirect evidence “Allflow has been serving the top of the South since the 1960s, including waste water services from 1977.” Source: RevenueBase Database · checked Sep 19, 2026
22	Pipeline & Infrastructure North LTD	Partial evidence	Wainui, New ZealandHQ checked Sep 19, 2026	11-50	4 contacts →
	Partial evidence “Pipeline & Infrastructure (North) Ltd are an established Civil Engineering Contractor, specialising in the construction, repair, and rehabilitation of large diameter pipelines and…” Source: RevenueBase Database · checked Sep 19, 2026
23	Mactrap	Partial evidence	Tauranga, New ZealandHQ checked Sep 19, 2026	1-10	4 contacts →
	Partial evidence “MACTRAP specialises in the design, manufacture, and distribution of wastewater separation systems and associated pumping solutions.” Source: RevenueBase Database · checked Sep 19, 2026
24	Atlan Stormwater NEW Zealand	Indirect evidence	Mangere, New ZealandHQ checked Sep 19, 2026	51-200	3 contacts →
	Indirect evidence “At Atlan Stormwater, we draw on more than 45 years’ experience in the design, testing and manufacture of water treatment systems that are utilised in over 45 countries.” Source: RevenueBase Database · checked Sep 19, 2026
25	Apex Water LTD	Partial evidence	Timaru, New ZealandHQ checked Sep 19, 2026	51-200	3 contacts →
	Partial evidence “Apex Water promises guaranteed environmental performance and that makes us leaders in water & wastewater treatment.” 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 54 wastewater engineering companies based in New Zealand

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Wastewater engineering companies based in New Zealand at a glance

As of Sep 19, 2026

47.3%Verified-email coverage

8.0Average contacts per company

11-50Median size (employees)

24.1%Largest-city concentration · Auckland

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured worldwide rather than for New Zealand, so it is reported there. Company counts and contact totals on this page are exact for New Zealand, over 54 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 New Zealand 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 New Zealand 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, 205 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 New Zealand?

RevenueBase identified 54 wastewater engineering companies headquartered in New Zealand 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?

Filtec LTD, headquartered in Auckland, tops this list with the largest team on record.

Which city has the most wastewater engineering companies?

Auckland leads with 13 headquartered companies, followed by Hamilton (4) and Christchurch (3).

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 205 verified decision-maker contacts tracked across these 54 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.