Hygiene in Food Manufacturing: Zones and Allergens
Monday, six in the morning. The early shift starts, the line runs up, and there is still hazelnut dust in the hopper from Friday. However, today's plan starts with a nut-free batch. Moments like this decide how well hygiene in food manufacturing really works. After all, many people work on large equipment at high volumes, and a single mistake affects thousands of packs at once.
How a manufacturing site differs from a kitchen
A kitchen team cooks for the next few hours. A manufacturing site, on the other hand, produces goods that sit on retail shelves for days or weeks. As a result, hygiene failures show up later and on a much larger scale.
The technology is also different. Conveyors, fillers, slicers and pipework have gaps, seals and dead zones. Product residues collect there, often where nobody can see them.
Still, the basics stay the same. What applies to general hygiene in any food business also applies in production. The main differences are scale, equipment and the number of handover points.
Which EU rules apply to manufacturers
The central legal basis is Regulation (EC) No 852/2004 on the hygiene of foodstuffs. Its Annex II requires premises to be designed so that contamination between and during operations is avoided. In addition, Article 5 requires a procedure based on HACCP principles.
For products of animal origin, Regulation (EC) No 853/2004 usually applies as well. Many of these sites therefore need approval by the competent authority rather than simple registration.
If you produce ready-to-eat foods, Regulation (EC) No 2073/2005 on microbiological criteria also matters. It plays a key role in environmental monitoring, as you will see below.
National rules can add further requirements on top of EU law. For that reason, always check with your competent authority what applies at your site.
Plan hygiene zones and product flow
A clean site starts with the floor plan. Raw materials, processing and packing should follow each other so that product moves in one direction only. In practice, backward routes are a common cause of cross-contamination.
Many sites divide their premises into hygiene zones. Goods-in counts as a basic hygiene area. By contrast, the area after cooking, where open ready-to-eat product is handled, counts as a high-care or high-risk zone.
Drainage follows the same logic. Annex II states that waste water must not flow from a contaminated area towards a clean one. Moreover, cleaning agents and disinfectants must not be stored in areas where food is handled.
Staff, hygiene locks and workwear
People carry germs from zone to zone. That is why entrances to sensitive areas need a clear hygiene lock. Here, staff change clothing or shoes, wash their hands and disinfect them.
The regulation requires changing facilities where necessary. On manufacturing sites, this is almost always the case. It is also important to keep outdoor clothing and workwear apart.
Colour often works as a simple tool. For example, many sites give each zone its own workwear colour, so that zone changes stand out at once.
Annex II also requires that staff are supervised and instructed or trained in food hygiene according to their work. In production, this means that anyone working in a high-care zone knows the lock rules and understands why they exist. New starters and agency workers get this briefing before their first shift on the line. You can schedule and record these briefings with the QMSpot training and instructions module.
Allergen management on lines and equipment
Since 2021, Regulation 852/2004 has covered allergen management explicitly. The amendment made by Commission Regulation (EU) 2021/382 on allergen management and food safety culture also affects your equipment.
Equipment and containers used for allergenic ingredients may only be used for allergen-free products after cleaning. In addition, you must at least check that no visible residues remain.
In practice, a smart production order helps first. So you run allergen-free batches first and allergen-containing ones afterwards. Cleaning then follows before the next allergen-free batch starts.
Prevent foreign bodies
Glass, hard plastic, metal fragments and wood splinters are typical foreign bodies. For this reason, Annex II requires premises that prevent foreign matter from getting into food.
Many sites use metal detectors or X-ray systems at the end of the line. Whether such a device is a critical control point is something you decide in your hazard analysis.
A glass and hard plastic register is also worth keeping. In it, you list every breakable item in the production area and check it regularly. If you find a breakage, you hold the affected product and log the incident in the QMSpot defect management module.
Cleaning and environmental monitoring
Production equipment can rarely be cleaned with a cloth. Usually, you need to take it apart, open seals and reach dead zones on purpose. A written cleaning plan for each machine therefore sets out steps, agents and contact times.
You verify cleaning results with swabs or contact plates. Listeria deserves special attention here. According to the EFSA topic page on Listeria, Listeria monocytogenes is one of the bacteria that can persist in food processing environments. It can also grow at refrigeration temperatures.
If you make ready-to-eat foods that pose a Listeria risk, Article 5 of Regulation 2073/2005 requires samples from processing areas and equipment. A sampling plan therefore defines where, how often and for what you test.
Food safety culture across shifts
Since 2021, Regulation 852/2004 has also required an appropriate food safety culture. Management commits to producing safe food. Furthermore, it provides enough resources so that hygienic work is actually possible.
In shift work, communication matters most. The regulation explicitly mentions open communication between work areas, including about deviations. A proper handover between early and late shift is therefore part of hygiene.
The requirement takes the nature and size of your business into account. A small manufacturer does not need a culture programme, but clear responsibilities and honest feedback.
What you need to document
HACCP plan. Hazard analysis, control points and limits for each line, reviewed regularly.
Cleaning plans. One per machine, with responsible staff, agents and release after cleaning.
Allergen changeovers. Cleaning and visual checks between allergen-containing and allergen-free batches.
Foreign body control. Detector checks, glass register and breakage incidents.
Environmental monitoring. Sampling plan, results and actions after positive findings.
Training. Instructions by role, including zone and lock rules.
Shift handovers. Deviations, downtime and open issues. You can set up all of these records as digital checklists and inspection plans and tick them off right at the line.
Frequently asked questions
Does EU law define fixed hygiene zones?
No, the EU regulations do not define fixed zones. However, they require you to avoid contamination between operations. Hygiene zones are therefore a proven practical tool to meet that duty.
Do I need IFS Food or BRCGS certification?
The law does not require it. Many retailers, though, ask for it as a condition of supply. Your internal audits are the best preparation, and the QMSpot audit management module helps you run them.
Is a visual check enough after an allergen changeover?
The regulation names cleaning and at least a visual check. For sensitive products, many sites also add rapid allergen tests. Your hazard analysis shows which check is appropriate.
How often do I need to take environmental samples?
Regulation 2073/2005 does not set a fixed frequency. Instead, you define it in your sampling plan by product, zone and risk. After positive findings, you increase the frequency until the cause is fixed.
How to get started
Tomorrow, take a floor plan of your site and a pen. Draw how product, staff and waste move through the building. Then mark every point where two routes cross.
These crossings are your first tasks. For each one, you set a rule, a check and a record. To see how this comes together in one system, take a look at quality management software for manufacturing.
Is your production still running on paper lists at every line?
Then let's talk briefly about your site and see how you can manage allergen changeovers, cleaning releases and environmental monitoring with QMSpot in a clear and traceable way.