Fly Control in Commercial Kitchens: HACCP Requirements Explained

A single house fly can carry over 100 pathogens — including Salmonella, E. coli, and Listeria — transferring them from waste areas to food preparation surfaces in seconds. In a commercial kitchen, fly activity is not just a nuisance; it is a direct food safety and HACCP compliance failure.

HACCP Requirements for Fly Control

Under HACCP, fly control is a prerequisite program (PRP). The HACCP plan must document:

Fly control measures in place at all food handling areas
Monitoring procedures and frequency
Corrective actions for fly activity above acceptable levels
Records of all fly control activities and monitoring results
Verification that fly control measures are effective

The Three-Layer Fly Control Approach

Layer 1

Exclusion

Prevent flies from entering the kitchen. This includes fly screens on all windows and ventilation openings, air curtains on frequently opened doors, and ensuring all external doors are self-closing and well-sealed.

Layer 2

Elimination of Breeding Sites

Remove the conditions that allow flies to breed. Drain flies breed in organic matter in drains — biological drain treatments eliminate this. Fruit flies breed in overripe fruit and fermenting liquids — proper waste management and sealed bins are essential.

Layer 3

Knockdown and Monitoring

Electronic fly killers (EFKs) provide continuous, chemical-free fly control and monitoring. Glue board catch counts provide data on fly pressure levels — a sudden increase in catches indicates a new breeding source or entry point that needs investigation.

Electronic Fly Killer Placement: Getting It Right

EFK placement is critical — a poorly positioned unit will attract flies into the kitchen rather than intercepting them at entry points. Key rules:

Position EFKs near entry points — not near food preparation areas
EFKs should not be visible from outside (UV light attracts flies from outside)
Mount at 2–2.5m height for maximum coverage
Never position directly above food preparation or storage areas
Replace glue boards every 4–6 weeks — full boards lose effectiveness

Drain Fly Management: The Hidden Problem

Drain flies are often overlooked but are one of the most common fly problems in commercial kitchens. They breed in the organic biofilm that builds up inside drains and drainage channels. Signs of drain fly activity include:

Small, moth-like flies resting on walls near drains
Flies emerging from drain covers in the evening
Persistent low-level fly activity despite other treatments

Biological drain treatments using enzyme-based products break down the organic biofilm that drain flies breed in. Monthly drain treatments are recommended as part of any commercial kitchen fly control program.