Guidelines

A complex range of Standards and Guidelines apply in New Zealand.

LEI is experienced in navigating national and regional standards and guidelines, supporting you to meet all of your project requirements. Below, you'll find links to examples of some key standards and guidelines we work with.

Municipal Wastewater

NZLTC New Zealand Guidelines for Utilisation of Sewage Effluent on Land - Part 1

NZLTC New Zealand Guidelines for Utilisation of Sewage Effluent on Land - Part 2

Guidelines for Beneficial use of Biosolids on Land (2025)

Victoria EPA Guidelines for use of reclaimed water 168

California Health Law Title 22 (2018)

Onsite Wastewater

On-site domestic wastewater management (AS/NZS 1547:2012)
On-site domestic wastewater treatment units - Septic tanks (AS/NZS 1546.1:2008)
On-site domestic wastewater treatment units - Aerated wastewater treatment systems (AS/NZS 1546.3:2008)

Industrial Wastewater

Farm Dairy Effluent (FDE) Systems (Dairy NZ)
Farm Dairy Effluent (FDE) Design Standards and Code of Practice (Dairy NZ)

Dairy Effluent Storage Calculator (DESC) (Dairy NZ)
IPENZ 21: Farm Dairy Effluent Pond Design and Construction