🧪 Can a cleanroom pass qualification and STILL have a contamination control problem?
Yes — absolutely.
Passing qualification demonstrates that the cleanroom met defined acceptance criteria under the conditions tested at that time. But contamination control is an ongoing state that depends on the facility, HVAC system, people, processes, cleaning, monitoring, and maintenance continuing to work together.
⚠️ Where can the risk come from?
💨 Airflow changes — Poor airflow patterns, blocked returns, equipment changes, or HVAC imbalance can create higher-risk areas.
🚪 Pressure cascade failures — Frequent door opening, interlock issues, leakage, or HVAC instability can compromise segregation.
🦠 Microbial contamination — Personnel, cleaning practices, materials, and process interventions can introduce contamination even when the room itself is qualified.
👩🔬 Personnel practices
🧹 Cleaning & disinfection weaknesses
4
3August 15, 2026 3K 1 6
