Our Services.
Stewart Civil provides a wide range of services and welcomes projects of all sizes and scopes. Larger projects may consist of upgrades and repairs to water mains and sewer water mains with required scheduling. Smaller projects may consist of sewer water repairs, kerbing, footpath and road repairs.
We offer project consultation, design, and full project management as well as sourcing materials and carrying out all works. We are fully Christchurch City Council and Queenstown Lake District Council approved for all three waters and awarded GOLD SiteWise Certification.
Our services are available throughout the South Island of New Zealand.
Earthworks
Our experienced team and comprehensive fleet of machinery enable Stewart Civil to provide a full range of earthmoving and excavation, concreting and asphalting services.
Stewart Civil Earthworks excels in earth moving, site shaping, clearances, and foundation excavation services, employing a diverse range of machinery and resources for precision and efficiency.
Pipe Bursting
Stewart Civil provides a specialised trenchless pipe bursting service, which not only efficiently replaces buried pipelines like sewer, water, or natural gas lines but also offers significant cost-saving potential by minimising the need for traditional trench construction.
Specialty Services
Stewart Civil offers a wealth of experience to address a wide range of specialised problems. Our expertise spans directional drilling, restricted access solutions, ground water problems, and excessive depth challenges, all rooted in countless years of experience from around the world.
3 Waters Services
Stewart Civil 3 Waters Drainage Service, as Councils authorised installers, boasts a trusted reputation in the industry. We specialise in the comprehensive installation of network pipelines, laterals, sumps, manholes, tanks, and related infrastructure. With an extensive range of specialized equipment, we excel in projects regardless of depth, ensuring efficient and effective drainage solutions.
Civil Construction
Stewart Civil offers comprehensive Civil Construction services with a wide range of specialised equipment and extensive experience. Our expertise includes handling projects such as retaining wall construction, kerbing preparation and installation, footpath preparation, and asphalt placement. We are also equipped to manage road dig-outs and larger earthworks.
Water Installation
Stewart Civil Water Installation offers council-approved services for a wide range of pipe sizes and types. Our expertise includes compliant installations, live tapping, back flow prevention and thorough testing to ensure reliable water supply solutions.
Learn More About Our Services
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Stewart Civil Ltd – Water Testing & Chlorination Services
At Stewart Civil Ltd, we offer comprehensive water testing and chlorination services to ensure your water infrastructure is compliant, safe, and ready for service. With a dedicated team of qualified professionals and industry-standard equipment, we provide fast, reliable, and certified testing solutions across Canterbury and Otago.
Our Capabilities Include:
Water Testing Services
Pressure Testing (M1–M5 standards):
M1: Hydrostatic pressure test
M2: Air testing
M3: Pressure loss
M4: Combined testing
M5: Water loss testing
M8: Visual testing
Data Logging and Reporting: Electronic reports with GPS data, pressure curves, and test duration logs.
Chlorination Services
Initial Disinfection and Flushing: Full pipeline disinfection using sodium hypochlorite solutions.
Chlorination to NZ Drinking Water Standards: Dosing rates calculated for pipeline volume, contact time, and residual chlorine targets.
Dechlorination and Safe Discharge: Neutralising agents used to ensure safe environmental discharge post-treatment.
Bacteriological Sampling and Testing
Post-Chlorination Bacteria Testing:
Sampling undertaken in accordance with NZ Drinking Water Standards.
Independent IANZ-accredited lab analysis for:
Total Coliforms
E. coli
Heterotrophic Plate Count (HPC)
Sampling Certificates Provided: Full documentation for council and compliance requirements.
