Three Waters Contractor

Expert Stormwater Drainage & Wastewater Solutions throughout Taranaki & Whanganui

Excavat Ltd is your trusted local three waters contractor based in Hāwera, proudly serving the Taranaki and Whanganui regions. Our team specialises in delivering comprehensive water infrastructure services including stormwater drainage, wastewater management, and potable water supply systems — all designed to meet the unique needs of local government, commercial and rural projects.

With years of hands-on experience and a commitment to quality, we ensure your water systems comply with local council requirements, environmental standards, and your specific site conditions.

What Are the Three Waters?

The term “three waters” refers to stormwater, wastewater, and potable (drinking) water, essential elements of any building or infrastructure project. Proper management of these waters is critical for safety, hygiene, and environmental protection.

Stormwater

Systems designed to manage rainwater runoff and mitigate flood risks.

Wastewater

Sewerage systems for the collection, transport, and treatment of commercial, and industrial wastewater.

Potable Water

Infrastructure for the supply and distribution of clean, safe drinking water.

Our Three Waters Services

Stormwater Drainage Systems

Managing stormwater effectively is essential to protect your property and the environment. We install a range of drainage solutions including:

Our stormwater drainage designs are customised based on site surveys and rainfall data to ensure maximum efficiency and compliance with local council regulations. Proper stormwater management reduces flood risk and soil degradation, safeguarding your investment.

Wastewater and Sewer Installation

Safe and compliant wastewater management is a priority for all property owners. Excavat Ltd handles:

We ensure all installations meet regional council health and environmental standards, minimising the risk of contamination and costly future repairs.

Water Mains Supply & Install

The infrastructure for supply and distribution of clean, safe drinking water is vital. Our services include:

We work closely with local authorities and water suppliers to guarantee your potable water system is safe, compliant, and efficient.

WHY CHOOSE EXCAVAT?

Local Expertise

Our team understands Taranaki and Whanganui’s unique geology, weather, and council requirements.

Experienced Operators

Skilled professionals operate our modern machinery to deliver efficient, safe, and high-quality results.

Comprehensive Service

From design through to installation and maintenance, we manage every stage of your three waters project.

Customer Focus

We communicate clearly, work to agreed timelines, and prioritise your satisfaction.

Health & Safety

Strict protocols protect you, your property, and our crew throughout the project.

HAVE QUESTIONS? WE’RE HERE TO HELP

Three Waters Contractor FAQs

What does “three waters” mean in civil construction?

Three waters” refers to the three core water services: stormwater (rainwater runoff), wastewater (sewage), and potable water supply (drinking water). A three waters contractor installs and maintains the infrastructure that manages these essential services.

What three waters services do you provide?

We handle trenching, pipe laying, culvert installation, manholes, pump stations, and drainage systems for stormwater, wastewater, and potable water across local government projects, commercial sites, and subdivision developments.

Do you install stormwater drainage systems?

Yes, we install stormwater infrastructure including pipes, soak pits, sumps, swales, and detention systems to effectively manage surface water and prevent flooding or erosion.

Are you experienced with wastewater and sewer line installations?

Absolutely. We construct new wastewater systems, install sewer lines, and connect developments to council infrastructure, following all required environmental and engineering standards.

Can you manage potable water supply installation?

Yes, we install potable water mains and service connections, ensuring clean, reliable water supply and full compliance with local authority specifications.

Do your three waters services meet council and engineering requirements?

Yes, we work closely with engineers and councils across Taranaki and Whanganui to ensure all three waters infrastructure is installed to code and passes inspection for sign-off.

What areas do you cover as a three waters contractor?

We provide three waters infrastructure services across the Taranaki and Whanganui regions, including Hāwera, New Plymouth, Stratford, Whanganui City, and surrounding rural areas.

Project Process: What to Expect When Working with Us

Initial Consultation & Site Assessment

We start with a detailed site inspection, assessing soil type, drainage patterns, and existing infrastructure.

Design & Planning

Our engineers design a tailored three waters system, including compliance with local council and environmental regulations.

Permits & Approvals

We handle all necessary paperwork, ensuring your project meets regulatory standards.

Installation & Construction

Our operators use state-of-the-art equipment to install systems efficiently and safely.

Testing & Final Checks

We perform rigorous testing and certification to guarantee functionality and compliance.

VIEW SOME OF OUR RECENT PROJECTS

Eltham Road Stormwater Upgrade

We undertook the Eltham Road stormwater upgrade project for South Taranaki District Council to address failing underground drainage systems at the Stock Underpass location. This project involved the complete replacement

Stormwater Renewal Ōpunake

Excavat was contracted by South Taranaki District Council (STDC) to undertake the Opunake Stormwater Renewal project. This upgrade involved replacing outdated 650mm steel corrugated stormwater pipes with

Testimonials

Bert replied to our query fast and efficiently. He arrived on time, took photos and had a quote for the work back to us in a few hours. The work was then completed well within the time frame he promised. He sent photos and communicated well (we live off site) I rarely give a 5 star. This company is worth it.

I can’t speak highly enough of the Excavat team. We are thrilled with our driveway. Thank you Bert and the crew.

Thanks to Bert and the team at Excavat. You did a fantastic job resolving our landscaping issue, and now we have a solid building platform for the new X Span shed house. I recommend Excavat to anyone. Great team, great workmanship, great results!

A massive shout out to Bert and his team. He has been great to work with and has an awesome team of incredibly hard workers. They have been with us from the beginning of the build. They’ve done a bit of everything, and also worked on our landscaping and lastly the drive. Full of good advice, quick and efficient, and everything is left so neat and tidy.

Personally we have only used these blokes to dig a hole for our large 4m in ground trampoline, Joel was in and out within 3.5hrs quick to return phone calls and a gentleman to work with considering the miniscule size of the job, I have more recently observed them working on a large scale commercial building project which involved numerous contractors and H/D machinery, [Monkeytoe H.O Taranaki] what has impressed me is the professionalism of the operators, there friendly out going demeanor and honest communication style .... all go from get go type of dudes.

Excavat got my driveway prep done efficiently and to standard I wanted. Joel is great to work with. Highly recommend this company.what has impressed me is the professionalism of the operators, there friendly out going demeanor and honest communication style .... all go from get go type of dudes.

Fantastic crew ; Very reliable; Very trustworthy ;Very efficient and professional Extremely quick to respond Genuinely good Taranaki blokes;Cannot fault these guys;Extremely good end product Definitely deserves return business; Thanks guys for a stress free experience;And Bert and Joel you’re not too bad either

Local Expertise Serving
Taranaki & Whanganui

As a proud three waters contractor based in Hāwera, we cover a wide area including:

South Taranaki | Hāwera, Eltham, Normanby, Manaia, Kaponga, Pātea, Ōpunake

North Taranaki | New Plymouth, Stratford, Inglewood, Bell Block, Waitara

Whanganui region | Whanganui city, Castlecliff, Kai Iwi, Fordell, and surrounding rural areas

Our local knowledge means every project benefits from expert advice tailored to your environment.