Company lists · Data refreshed September 2026

Top 25 Wastewater engineering and design firms based in New Zealand

Name: Wastewater engineering and design firms 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 58 companies tracked

RevenueBase identified 58 wastewater engineering and design firms headquartered in New Zealand as of September 2026 and tracks 502 professional contacts across them, including 294 with verified work emails. Auckland is the largest hub.

This list covers wastewater engineering and design firms 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

58Companies

502Contacts tracked

294Verified emails

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The 25 largest wastewater engineering and design firms based in New Zealand

Ranked by team size

Top 25 of 58 wastewater engineering and design firms 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 and design firms: 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	Pipeline & Civil LTD	Partial evidence	Auckland, New ZealandHQ checked Sep 19, 2026	51-200	56 contacts →
	Partial evidence “Pipeline and Civil are proven to provide innovative and technically sound solutions to complex projects involving critical assets; designed to mitigate risks while guarding a…” Source: RevenueBase Database · checked Sep 19, 2026
3	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
4	AWA Environmental	Indirect evidence	Wellington, New ZealandHQ checked Sep 19, 2026	11-50	37 contacts →
	Indirect evidence “Awa Environmental is shaping stormwater to reduce flood risk, protect critical assets and infrastructure, and build resilient communities and thriving ecosystems.” Source: RevenueBase Database · checked Sep 19, 2026
5	Blue Barn Consulting LTD	Indirect evidence	Auckland, New ZealandHQ checked Sep 19, 2026	11-50	28 contacts →
	Indirect evidence “Blue Barn Consulting was established in 2008, and is proudly 100% New Zealand owned and operated.” Source: RevenueBase Database · checked Sep 19, 2026
6	Devan Plastics Limited	Partial evidence	Tauranga, New ZealandHQ checked Sep 19, 2026	51-200	18 contacts →
	Partial evidence “We manufacture and design Water and Waste Water Solutions for the Urban, Rural and Commercial Market.” Source: RevenueBase Database · checked Sep 19, 2026
7	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
8	Utilities Infrastructure NZ	Indirect evidence	Rolleston, New ZealandHQ checked Sep 19, 2026	51-200	13 contacts →
	Indirect evidence “Established in 2013 we have gone from strength to strength through the commitment of our people and the investment in our specialised plant and equipment, Focused on providing…” Source: RevenueBase Database · checked Sep 19, 2026
9	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
10	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
11	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
12	Innoflow Technologies NZ Limited	Strong evidence	Dairy Flat, New ZealandHQ checked Sep 19, 2026	11-50	10 contacts →
	Strong evidence “Wastewater treatment, Community Pressure Sewers, Wastewater Design, Build & Operate.” Source: RevenueBase Database · checked Sep 19, 2026
13	Rendertech LTD	Partial evidence	Auckland, New ZealandHQ checked Sep 19, 2026	11-50	10 contacts →
	Partial evidence “With over three decades’ experience in New Zealand’s processing industry, Rendertech helps businesses optimise their plant efficiency and throughput with specialist engineering…” Source: RevenueBase Database · checked Sep 19, 2026
14	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
15	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
16	Blueline Consulting NZ	Partial evidence	Taupo, New ZealandHQ checked Sep 19, 2026	11-50	7 contacts →
	Partial evidence “We are a forward-thinking consultancy driven by our passion for pioneering design concepts and advancing sustainable solutions.” Source: RevenueBase Database · checked Sep 19, 2026
17	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
18	Submergent Limited	Partial evidence	Auckland, New ZealandHQ checked Sep 19, 2026	1-10	6 contacts →
	Partial evidence “Submergent Limited provides computer modelling services to the New Zealand water engineering industry.” Source: RevenueBase Database · checked Sep 19, 2026
19	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
20	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
21	Austin Bluewater	Partial evidence	Christchurch, New ZealandHQ checked Sep 19, 2026	11-50	5 contacts →
	Partial 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
22	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
23	Arawai Engineering Consulting	Partial evidence	New Plymouth, New ZealandHQ checked Sep 19, 2026	1-10	4 contacts →
	Partial evidence “We assist in the design and construction management of above and below ground infrastructure; from buildings to land development, roading, and three waters networks.” Source: RevenueBase Database · checked Sep 19, 2026
24	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
25	Neuflow Projects	Partial evidence	Rukuhia, New ZealandHQ checked Sep 19, 2026	1-10	4 contacts →
	Partial evidence “Neuflow Projects are a team of project specialists encompassing innovative conceptual planning, investigations and feasibility studies, preliminary designs, detailed designs…” 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 and design firms. 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 and design firms.
Partial evidence: Its own public description names part of wastewater engineering and design firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name wastewater engineering and design firms. 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 58 wastewater engineering and design firms based in New Zealand

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Wastewater engineering and design firms based in New Zealand at a glance

As of Sep 19, 2026

58.6%Verified-email coverage

8.7Average contacts per company

11-50Median size (employees)

36.2%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 58 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 and design firms, 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 and design firms”. 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 and design firms), 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 and design firms, 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, 294 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 and design firms, 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 and design firms are there based in New Zealand?

RevenueBase identified 58 wastewater engineering and design firms 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 and design firms?

Auckland leads with 21 headquartered companies, followed by Christchurch (3) and Hamilton (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 294 verified decision-maker contacts tracked across these 58 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.