What is environmental monitoring in GMP?

• A. A plan for calibrating measuring equipment.
• B. A procedure for waste segregation.
• C. A system to monitor potential contamination in the environment (e.g., swab samples of surfaces, air samples, microbial counts in non-production areas).
• D. A method for cleaning validated to reduce residues.

Answer: (C)

Environmental monitoring in GMP is the systematic checking of the production environment for potential contaminants that could affect product safety and quality. It involves collecting and analyzing samples from the surroundings—such as swabs of surfaces, air samples, and microbial counts in non-production and production-adjacent areas—to detect trends, verify that cleanliness and containment controls work, and trigger corrective actions when needed. This approach helps ensure that environmental conditions remain within specified limits, supports cleaning and disinfection effectiveness, and provides data for ongoing validation and risk assessment.

The other activities mentioned—calibrating measuring equipment, waste segregation, and cleaning validation—are important GMP practices, but they describe different areas: calibration ensures measurement accuracy of tools, waste segregation handles disposal and contamination risk, and cleaning validation confirms that cleaning achieves the required residue reduction. Environmental monitoring specifically targets the environment’s role in contamination risk.