Creating a contamination control strategy for a new facility starts with mapping every point where contaminants can enter, move through, or accumulate in your controlled environment, then assigning specific control measures to each risk zone. The strategy must be built before operations begin, not retrofitted after contamination events occur. The sections below address the most important questions facility managers face when designing a contamination control plan from the ground up.
What are the key contamination risks when opening a new facility?
The key contamination risks in a new facility are personnel movement, wheeled traffic, raw material intake, HVAC inadequacies, and surface cross-contamination. Of these, floor-level contamination is the most significant and most frequently underestimated risk. Industry experience consistently shows that around 80% of contaminants entering controlled environments are carried in at floor level, primarily on footwear and wheel surfaces.
Personnel are the most persistent contamination vector in any facility. Every person entering a controlled zone carries particulates on their clothing, footwear, and skin. In a new facility, before disciplined gowning and entry protocols become habitual, this risk is especially acute. Wheeled traffic compounds the problem significantly. Forklifts, pallet trucks, and trolleys travel between uncontrolled and controlled zones, transferring contaminants across large surface areas with every pass.
Beyond physical particulates, biological contamination is a concern in pharmaceutical, food and beverage, and healthcare environments. Microbial transfer from external surfaces, packaging, or personnel can compromise product integrity and trigger regulatory non-compliance. New facilities should also account for construction residue, which can linger in HVAC systems, on structural surfaces, and in flooring substrates long after building work is complete.
What does a contamination control strategy actually include?
A contamination control strategy is a documented plan that defines the contamination risks within a facility, establishes physical and procedural controls to manage those risks, assigns accountability for each control, and sets out how compliance will be monitored and validated. It is not a single product or measure but a layered system that addresses contamination at every point of entry and movement within the facility.
A well-constructed contamination control plan typically includes the following components:
- Risk assessment: Identifying contamination sources, pathways, and the potential impact on product, process, or patient safety
- Zone classification: Defining controlled, semi-controlled, and uncontrolled areas with clear physical boundaries
- Entry point controls: Specifying what measures apply at each transition point between zones, including gowning protocols, airlocks, and floor-level capture systems
- Traffic management: Establishing rules for the movement of personnel, equipment, and materials to minimise cross-zone contamination
- Cleaning and maintenance schedules: Documenting how contamination control assets are maintained to remain effective
- Training requirements: Ensuring all personnel understand the strategy and their responsibilities within it
- Validation and monitoring: Defining how the strategy’s effectiveness is measured and reviewed over time
For regulated industries such as pharmaceuticals or medical devices, the strategy must also align with applicable standards including GMP guidelines, ISO classifications, and FDA requirements. Documenting the strategy in a format that supports audit readiness is essential from day one.
How do you map contamination control zones in a new facility?
Contamination control zones in a new facility are mapped by classifying areas according to their cleanliness requirements and then defining the transition boundaries between them. The process starts with the most critical zone, typically the cleanroom or production area, and works outward to identify every point where contamination could migrate inward.
Begin by reviewing your facility’s floor plan alongside your product or process requirements. Regulatory standards such as ISO 14644 for cleanrooms or EU GMP Annex 1 for sterile manufacturing specify air cleanliness classifications that directly inform zone boundaries. Once classifications are established, the physical layout of entry points, corridors, gowning rooms, and airlocks can be mapped against them.
Key principles for effective zone mapping include:
- Defining clear, physical demarcation lines between zones rather than relying on procedural boundaries alone
- Ensuring that every transition from a lower-classification zone to a higher one has a dedicated control measure at the boundary
- Accounting for all traffic types separately, as pedestrian and wheeled traffic require different control solutions
- Considering the direction of airflow and pressure differentials, which affect how particulates move between zones
- Reviewing loading bays, raw material intake points, and waste removal routes, as these are often overlooked high-risk boundaries
Once the zone map is complete, it becomes the foundation for specifying what contamination control measures are required at each boundary. This document should be revisited whenever the facility layout changes or new processes are introduced.
What contamination control measures should go at facility entry points?
Facility entry points should have layered contamination control measures that capture particulates from both footwear and wheeled equipment before they can enter controlled zones. The most effective approach combines physical capture systems at the floor level with gowning protocols and, where appropriate, airlocks or anterooms to create a controlled transition space.
At pedestrian entry points, floor-level contamination capture is the first and most critical line of defence. Reusable polymeric mats engineered to remove particulates from shoe soles are significantly more effective than disposable sticky mats, which lose adhesion rapidly and generate single-use plastic waste. For wheeled traffic entry points, the scale and weight of equipment demand purpose-built solutions capable of withstanding forklifts and pallet trucks without degrading.
Additional measures that should be considered at entry points include:
- Gowning rooms or change areas positioned before the controlled zone boundary
- Air showers at high-sensitivity entries to dislodge surface particulates before personnel enter
- Positive pressure airlocks that prevent uncontrolled air from entering critical zones
- Clear visual signage and floor markings that reinforce zone boundaries and expected behaviour
- Handwashing or sanitisation stations where biological contamination is a specific concern
The combination of measures at each entry point should be proportional to the risk. A gowning room entrance to a Grade A pharmaceutical cleanroom demands a different level of control than the entrance to a food production area, but both benefit from robust floor-level particulate capture as a baseline measure.
Which industries have the strictest contamination control requirements for new facilities?
The industries with the strictest contamination control requirements for new facilities are pharmaceutical manufacturing, medical device production, semiconductor and electronics fabrication, and aerospace component manufacturing. These sectors operate under regulatory frameworks that mandate documented contamination control plans, validated processes, and ongoing monitoring as conditions of operating licence and market access.
In pharmaceutical manufacturing, EU GMP and FDA 21 CFR Part 211 set out detailed requirements for facility design, cleanroom classification, and contamination prevention. New facilities must demonstrate compliance before production can begin, and contamination events can result in product recalls, regulatory warning letters, or facility shutdown. The introduction of EU GMP Annex 1 revisions has raised the bar further for sterile product manufacturers in particular.
Semiconductor fabrication operates in some of the most demanding cleanroom environments in any industry, with ISO Class 1 to 3 environments required for the most sensitive processes. Even microscopic particulates can render components defective, making contamination control a direct driver of yield and commercial performance.
Medical device manufacturers face requirements under ISO 13485 and, in regulated markets, must demonstrate that their contamination control strategy is validated and maintained. Aerospace and defence manufacturers such as those producing precision components for aviation or space applications also operate under strict cleanliness standards, where particulate contamination can have critical safety implications.
Food and beverage facilities, while subject to different regulatory frameworks such as HACCP and BRC Global Standards, also carry significant contamination control obligations, particularly where allergen management and microbial control are concerned.
How do you validate that a contamination control strategy is working?
Validating a contamination control strategy means gathering objective evidence that the measures in place are achieving their intended outcome, specifically that contamination levels within controlled zones remain within defined acceptable limits. Validation involves both initial qualification when the facility opens and ongoing monitoring to confirm that performance is maintained over time.
Initial validation typically includes particle count testing in line with the facility’s ISO or GMP classification requirements, microbial monitoring where biological contamination is a concern, and surface swab testing at high-risk locations. These baseline measurements confirm that the facility, as designed and equipped, meets its contamination control targets before production begins.
Ongoing monitoring should include:
- Regular particle count measurements at defined sampling points within controlled zones
- Environmental monitoring programmes for microbial contamination in pharmaceutical and food environments
- Scheduled inspection and performance review of physical contamination control assets, including floor-level capture systems
- Trend analysis of monitoring data to identify early signs of deterioration before they become compliance issues
- Periodic revalidation following any significant change to the facility layout, processes, or personnel volumes
Documentation is as important as the monitoring itself. Regulatory auditors will expect to see records demonstrating that the contamination control plan has been implemented as designed, that monitoring is being conducted at the required frequency, and that any deviations have been investigated and resolved. A strategy that works but is poorly documented is a compliance risk in its own right.
How Dycem helps with contamination control strategy for new facilities
Dycem works with facilities teams at the planning stage to ensure that floor-level contamination control is built into the strategy from the outset, not added as an afterthought. With over 60 years of experience across pharmaceuticals, aerospace, electronics, food and beverage, and healthcare, Dycem’s contamination control specialists understand the regulatory demands and operational realities that new facilities face.
Dycem’s range of reusable polymeric contamination control mats is designed to address every zone type and traffic condition in a new facility:
- Dycem CleanZone: Delivers high-performance particulate capture at cleanroom entrances, gowning rooms, airlocks, and critical corridors where pedestrian and light-wheeled traffic are the primary risk
- Dycem WorkZone: Engineered for heavy-wheeled traffic including forklifts and pallet trucks, providing durable contamination control at loading bays, production hall entries, and logistics zones
- Dycem Floating Mats: Repositionable mats suited to facilities with variable or temporary zones that need flexible contamination control without permanent installation
- Dycem Bench Mats and Access Panels: Extend contamination control beyond the floor to workstation level and access points within the controlled environment
All Dycem mats are built with integrated Biomaster antimicrobial protection, carry a three to five year lifespan, and are manufactured to ISO 9001 and 14001 standards. Compared to disposable sticky mats, they represent a more sustainable and cost-effective long-term solution. To discuss your facility’s contamination control requirements and arrange a free site survey, contact Dycem’s specialists today.