Environmental monitoring (EM) checks that cleanrooms and controlled areas stay in the state of control they were qualified for. A monitoring programme samples air (with active air samplers and settle plates), surfaces (with contact plates and swabs), personnel (glove prints and gowns) and airborne non-viable particles at defined locations and frequencies.
Under EU GMP Annex 1, cleanrooms are classified into grades A to D, with grade A the critical zone for aseptic operations. Each grade has limits for viable and non-viable contamination, and sites set alert and action levels below or at these limits. An action-level result is an excursion: it is investigated, its impact on product assessed, and corrective action taken.
Why it matters in GMP
EM data is a key part of sterility assurance and of the contamination control strategy. Inspectors review whether excursions were investigated promptly, whether batches made during an excursion were assessed before release, whether the operators in aseptic areas were qualified, and whether trends — not just single results — are reviewed.
- Version alert and action limits, and record which version applied to each result.
- Link every excursion to an investigation and the batches it could affect.
- Keep gowning qualification current for everyone entering aseptic areas.
How Swat iQua Suite handles it
Swat iQua Suite keeps a cleanroom register with grade and qualification status, monitoring points, and alert and action limits managed in e-signed versions — each result stores the limit version in force. An action-level result opens an excursion automatically, and its e-signed disposition raises a deviation and blocks batch release. Gowning qualifications are recorded with an e-signature, and a sterile step cannot start unless the room is ready, no excursion is open and the operator is gowning-qualified.