National and international instances of explosions or near misses in wastewater infrastructure have been on the rise.

In response, the Water Services Association of Australia (WSAA) and its members have developed their own internal guidance on how to manage the risk of the formation of a potentially explosive atmosphere. 

This project provides a national guideline for classification of potentially explosive atmospheres in municipal wastewater infrastructure, with a specific focus on linear or network infrastructure. The guidance is designed to work in conjunction with existing documentation such as AS/NZS IEC 60079.10.1: 2022.

WSAA would like to thank the utilities that sponsored this project, and for making this work freely available to help increase safety across the water industry.

Icon Water

Mackay Regional Council

Melbourne Water Corporation

Queensland Water Directorate

SA Water

Sydney Water


Urban Utilities

Water Corporation

Whitsunday Regional Council

Yarra Valley Water


Project Deliverables

  • Guidelines for Potentially Explosive Atmospheres
  • Fact Sheet
  • Quick Start Guide
  • Video Walkthrough



AuthorWater Services Association of Australia and Stantec
Publication date

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Title Format Download
Quick Start Guide - Potentially Explosive Atmospheres.pdf PDF
Fact Sheet - Guide for Potentially Explosive Atmospheres.pdf PDF
Guidelines for Potentially Explosive Atmospheres 2023 v1.1.pdf PDF