Clients include:

Watercare Services Limited

Mighty River Power Limited

Auckland Council

Auckland Regional Council

Papakura District Council

Rodney District Council

Hauraki District Council

Department of Conservation

Environment Canterbury

Waikato Regional Council

Ministry for the Environment - has included Cirrus Associates Ltd on its specialist supplier list for Water Resource Management and Resource Consent Processing.

Young Wah Chong Limited

Stevensons Agriculture Limited

Snap Fresh Limited

Auckland Harbour Bridge Trust

Activities include:

 A policy and regulatory strategy to protect water supply.

A strategic plan linking wastewater systems for small rural settlements.

An urban stormwater strategy.

Advice on future water supply sources.

Assessments of environmental effects for wastewater discharges from pumping stations.

Resource consent applications for wastewater discharges to land, streams and coastal waters.

Assessments of environmental effects and project managing processes for applications for resource consents to dam, to drill bores, to take groundwater, and take water from streams.

Submissions and evidence for regional policy and plan development applications and hearings.

Submissions and evidence to development planning consent applications and hearings.

Councillor briefing papers on the impact of new legislation on District Council operations, planning, and water infrastructure.

Processing applications for resource consents to take and dam water.

Reviewing Local Authority water supply strategies, and asset management plans.

Technical editing of a Marine Reserve Monitoring Framework.

Auditing applications for consents to discharge household wastewater to land.

Processing applications for consents to discharge dairy shed effluent.

Preparing and presenting evidence for the Environment Court.

Project managing bore drilling and testing.