Ammonia Refrigeration SWMS

Ammonia refrigeration systems are widespread in food processing facilities including meat processing plants, dairy facilities, cold storage warehouses, and beverage manufacturing. Ammonia is acutely toxic — concentrations above 300 ppm are immediately dangerous to life and health, and even low-level leaks at 25 ppm cause eye and respiratory tract irritation. Major ammonia releases have caused fatalities and mass evacuations at food processing facilities worldwide. The WHS Regulation 2025 requires comprehensive emergency planning for facilities with ammonia refrigeration systems above threshold quantities. This template maps controls to the binding Managing Risks of Hazardous Chemicals Code of Practice effective 1 July 2026.

Legal Requirements

regulation

WHS Regulation 2025 Part 7.1 — Hazardous Chemicals and Part 3.2 — Emergency Plans

hrcw category

Work near hazardous chemical atmosphere

code of practice

Managing Risks of Hazardous Chemicals in the Workplace (binding 1 July 2026 under Section 26A)

section 26a binding

Yes — effective 1 July 2026. Non-compliance is admissible as evidence of breach.

Hazards

Hazard	Consequence	Likelihood
Acute ammonia exposure from system leak or rupture	Chemical burns to lungs, pulmonary oedema, death	Unlikely
Chronic low-level ammonia exposure from minor leaks	Chronic respiratory disease, eye damage	Possible
Ammonia vapour cloud drift affecting surrounding community	Mass evacuation, public harm, regulatory prosecution	Rare
Frostbite from contact with liquid ammonia or cold system components	Severe tissue damage, amputation	Unlikely
Explosion from ammonia-air mixture in confined space	Fatal explosion, facility damage	Rare
Asphyxiation from ammonia displacing oxygen in enclosed machine rooms	Loss of consciousness, death	Unlikely

Controls (Hierarchy of Controls)

Install continuous ammonia gas detection with audible and visual alarms at 25 ppm and 50 ppm set points

Maintain an ammonia emergency response plan including evacuation routes, assembly points, and notification procedures

Provide self-contained breathing apparatus and chemical splash suits for emergency response personnel

Conduct ammonia leak emergency drills at least annually with all workers

Implement a planned maintenance program for all ammonia system components including valves, seals, and relief devices

Install emergency ventilation systems in ammonia machine rooms with manual and automatic activation

Restrict access to ammonia machine rooms to authorised and trained personnel only

Display ammonia Safety Data Sheets and emergency procedures at all entry points to ammonia areas

Recent Prosecutions

Hilltop Meats Pty Ltd$750,000

Fatal incident at food processing facility where safety systems and procedures were inadequate.

2025 — SafeWork NSW v Hilltop Meats Pty Ltd [2025]

Inghams Enterprises Pty Ltd$450,000

Serious worker injuries at food processing facility due to inadequate safety controls.

2023 — SafeWork NSW v Inghams Enterprises Pty Ltd [2023]

What Your SWMS Must Include

✓Ammonia detection system specifications including alarm set points and testing schedule

✓Emergency response plan with evacuation routes, assembly points, and agency notification

✓SCBA and chemical suit locations, inspection schedule, and trained user register

✓Ammonia system maintenance program with component-level inspection intervals

✓Emergency drill schedule and drill evaluation procedure

Need a compliant Ammonia Refrigeration SWMS?

Our WHS consultants build facility-specific ammonia emergency plans and SWMS that meet WHS Regulation 2025 requirements and protect your workers and community.