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Cleanroom audit checklist

A cleanroom audit checklist is the list of checks that shows a cleanroom is used the way it was designed and qualified. That means pressures held, people gowned and qualified, materials brought in the right way, cleaning and monitoring done to plan, and tests current. This one has 33 checks split by how often they run. The each-shift checks cover pressure differentials, alarms, doors and airlocks, gowning, people and materials. The weekly checks cover the cleaning log, disinfectant rotation and the monitoring results. The per-plan checks cover ISO 14644-1 classification, filter integrity tests, airflow and recovery tests. The system checks cover change control, excursions and training. Each check says what to look at and is graded OK, Minor, Major, Critical or N/A. The PDF adds a gowning order to watch an entry against, a blank differential pressure log and a worked week of readings with one excursion. Limits are always yours: write your validated limits on the log, never a number from a template. It supports internal audits beside your quality system; it is not a classification test.

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Page 1 of the cleanroom audit checklistAudit details, the five grades, and the each-shift checks on pressure, alarms, doors, gowning and people, with a grade and a finding column.
33 checks by frequencyEach shift, weekly, per planFive grades with days to fixGowning orderDifferential pressure logFindings logExcel flags out-of-limit readingsWorked week of readingsPDF, Excel and Word
Filled-in Cleanroom audit checklist: a week of pressure readings with one excursion
The same sheet filled in with the worked example (page 7 of the PDF, illustrative numbers). Open full size (opens the picture in a new tab)

When to use it

When to use a cleanroom audit checklist

  • Every shift, for the short each-shift checks: pressures, alarms, doors, one watched gowning entry, materials coming in.
  • Once a week, when the cleaning log, disinfectant rotation and monitoring results are reviewed against the plan.
  • When your monitoring plan says a classification, filter, airflow or recovery test is due, to check the report is on file.
  • After an excursion, a change to the room or its air handling, or maintenance inside the room, before the room goes back into use.

How to fill it in

  1. 1

    Write your limits first

    Copy each room pair's validated low and high pressure limits, and the room's temperature and humidity ranges, onto the log before the first reading. They come from your design and qualification, not from this template.

  2. 2

    Run each group at its own frequency

    Each-shift checks at the start of every shift, weekly checks on a fixed day, per-plan checks when the plan says they are due, system checks with the quality team. One sheet covers all four, so nothing falls between them.

  3. 3

    Watch a gowning entry from outside

    Once a shift, watch one person gown through the window, against the posted order. Do not go in to watch: an extra person in the gowning room changes what you are checking.

  4. 4

    Grade and write the finding

    Grade each check OK, Minor, Major, Critical or N/A. Write each finding with the room, the time and what you saw: 'door 2 wedged with a cart at 12:40', not 'doors not OK'.

  5. 5

    Act on an excursion before you write it up

    A reading outside your limits is an excursion. Close the door or stop entries first, then recheck, record it and raise it with quality, who judge the effect on product.

  6. 6

    Close findings with a check

    Log every finding with an owner and a due date. Start the next audit by checking last time's open findings, and close each one only when someone has seen the fix work.

On the floor

When a reading is outside your limits

The order this template uses for an excursion, with the example's Tuesday reading as the case: act first, then record, then fix the cause.

  1. 1Each shift

    Read the gauges

    Every room pair against the limits copied onto the pressure log.
  2. 2Decision

    Inside the limits?

    Yes:
    log it and go on
    No:
    next step, now
  3. 3Minutes

    Act first

    Close the door, stop entries, read again. In the example: back to 15 Pa at 12:44.
  4. 4Same day

    Check the product

    Particle count in the room; hold open work until quality reviews it.
  5. 5Change control

    Record and fix the cause

    Excursion record, then the lasting fix: a cart bay, an 'airlock clear' check, a shorter alarm delay.

How often each check runs

Each shift, weekly, per plan: what gets checked when

The frequencies this template sets. Your environmental monitoring plan and SOPs decide yours; where they say more often, follow them.

  • Each shift

    What is checked
    Pressure differentials, alarms, doors and airlocks, temperature and humidity, one watched gowning entry, materials and equipment in the room
    Who usually does it
    Shift lead or cleanroom operator
    Record
    Pressure log, gowning observation, this checklist
  • Weekly

    What is checked
    Cleaning log against the schedule, disinfectant rotation and made-up solutions, particle and viable monitoring done and reviewed, trend review
    Who usually does it
    Area supervisor with quality
    Record
    Cleaning log, monitoring data, signed trend review
  • Per plan

    What is checked
    ISO 14644-1 classification, filter integrity, airflow, recovery and smoke tests, instrument calibration, plan review
    Who usually does it
    Quality or engineering, with trained testers
    Record
    Test reports, calibration register
  • Any time

    What is checked
    Change control, maintenance release, excursion handling, training and gowning requalification
    Who usually does it
    Quality team
    Record
    Change, maintenance, excursion and training records

The 33 checks

What to check in a cleanroom, by how often

Each check starts with its topic, asks one question and says what to look at. On the sheet each one gets a grade (OK, Minor, Major, Critical or N/A), the finding and an owner. Limits are always your own validated limits.

Each shift: pressure, alarms and doors

Before work starts and at every shift change

  1. 1Pressure: Is every room pair's differential pressure inside your validated range, and written on the log with the time and initials? Look at: the gauges or monitoring screen against the log; any reading sitting at the edge of the range.
  2. 2Alarms: Has every pressure, particle, temperature or humidity alarm since the last shift been acknowledged, explained and recorded? Look at: the alarm history on the monitoring system; who acknowledged each one and what they wrote.
  3. 3Doors: Do the airlock interlocks let only one door open at a time, and is no door wedged, taped or held open? Look at: try each interlock; door closers; marks on the floor where carts wait in doorways.
  4. 4Temperature and humidity: Are room temperature and relative humidity inside the ranges set for the room? Look at: the room displays against the log for this shift.
  5. 5Room status: Does the sign at each room's entrance show its true status (in use, cleaned, out of service)? Look at: the status board against what is happening inside.

Each shift: gowning and people

One observed entry per shift, plus a look at the room

  1. 6Gowning: Does everyone entering follow the posted gowning order, and is one entry each shift watched and recorded? Look at: an entry seen through the gowning room window; the observation record.
  2. 7Qualification: Is everyone in the room on the current list of people qualified to gown for this grade? Look at: names on the entry log against the gowning qualification list and its expiry dates.
  3. 8Garments: Are garments the right type and size for the grade, within their use or sterility date, with no tears or open seams? Look at: garment labels, packs on the shelf, one garment at the end of a shift.
  4. 9Personal items: Are jewelry, makeup, phones, paper and food kept out as your gowning procedure says? Look at: the pre-entry sign; pockets of coats left in the gowning room.
  5. 10Behavior: Do people move slowly, keep gloved hands off their face and off critical surfaces, and is the head count within the posted maximum? Look at: five minutes of watching; the head count against the sign.

Each shift: materials and equipment

How things come in, and what is in the room

  1. 11Transfer: Do materials come in only through the pass-through or material airlock, wiped or unwrapped as the transfer procedure says? Look at: one transfer in progress; the agent and wipe used; the outer wrap left outside.
  2. 12Pass-throughs: Are pass-through doors interlocked or opened one at a time, and is the hatch clean inside? Look at: open each side in turn; the floor and corners of the hatch.
  3. 13Paper and cardboard: Is cardboard kept out, and are records inside kept on cleanroom paper or a tablet? Look at: corners, under benches, the bins.
  4. 14Equipment labels: Does every piece of equipment show a clean status label and, where needed, a calibration or maintenance label in date? Look at: labels on balances, carts, fixtures and tools.
  5. 15Waste: Is waste bagged and taken out by the planned route, not left to build up? Look at: the bins, the waste route and the time of the last removal.

Weekly: cleaning and monitoring records

Records checked against the plan

  1. 16Cleaning log: Is every scheduled clean signed for, with the agent, its strength or lot, and the contact time? Look at: last week's cleaning log against the cleaning schedule.
  2. 17Disinfectant rotation: Is the agent in use the one your rotation plan calls for this week, including any periodic sporicide your plan sets? Look at: the plan, the bottle labels and the log.
  3. 18Made-up solutions: Is every made-up disinfectant labeled with name, strength, date made and expiry, and used within that date? Look at: bottles and buckets in use.
  4. 19Cleaning tools: Are mops, wipes and buckets kept for this grade only, stored dry and replaced on schedule? Look at: where they are stored, their color coding and wear.
  5. 20Particle counts: Were the airborne particle counts in your monitoring plan taken at the planned points and times, and is each excursion investigated? Look at: the counter's data or printouts against the plan.
  6. 21Viable monitoring: Where your plan calls for them, were settle plates, contact plates, air samples or glove prints taken and their results reviewed? Look at: the sample log, results and trend chart.
  7. 22Trend review: Has someone reviewed the week's pressure, particle and environmental data for drift, not only single excursions? Look at: the signed review and any action that came from it.

Per plan: certification and tests

At the intervals your monitoring plan sets

  1. 23Classification: Is each room's ISO 14644-1 classification current, with the report on file and the next date planned? Look at: the last classification report and its date against your plan.
  2. 24Filters: Has every HEPA filter had its integrity (leak) test to plan, and passed or been repaired and retested? Look at: the test report for each filter in the room, by filter ID.
  3. 25Airflow: Are air velocity or air change rates tested to plan and inside the design values? Look at: the test report; changes since it, such as new equipment or a moved return grille.
  4. 26Recovery and smoke tests: Where your plan or the room's grade calls for them, are recovery tests and airflow visualization done and on file? Look at: the reports and their dates.
  5. 27Instruments: Are pressure gauges, sensors and particle counters calibrated and in date? Look at: the calibration labels and the calibration register.
  6. 28Monitoring plan: Was the monitoring plan reviewed after the last change to the room, the process or the results trend? Look at: the plan's revision date against those changes.

System: changes, excursions and training

Any time; usually with the quality team

  1. 29Change control: Were changes to the room, its air handling or its use approved before they were made, with any retest done? Look at: change records from the last 6 months; the room as it is today.
  2. 30Maintenance: Is maintenance inside the room planned, then followed by cleaning and, where needed, a retest before the room goes back into use? Look at: the last two maintenance jobs and how the room was released.
  3. 31Excursions: Is each out-of-limit result investigated, its effect on product judged, and closed with an action? Look at: the last three excursions from start to close.
  4. 32Training: Are operators, cleaners and maintenance staff trained in cleanroom behavior, cleaning and gowning, with records? Look at: training records for three people seen in the room today.
  5. 33Gowning requalification: Is gowning qualification repeated at the interval your procedure sets, and does anyone who fails retrain before going back in? Look at: requalification dates; one failed attempt and what followed.

A filled-in example

Illustrative, not a benchmark

An example: one week of differential pressure readings in a made-up catheter assembly suite with an ISO 7 assembly room, an ISO 8 gowning room and an ISO 8 packing room, read at 07:00 and 12:40 each day (illustrative, the same as the Excel example sheet and page 7 of the PDF). The limits are the made-up plant's own validated limits.

Assembly (ISO 7) to gowning room (ISO 8): the week's 10 readings against the 10 Pa low limit

  • Mon 07:00: 15 Pa
  • Mon 12:40: 14 Pa
  • Tue 07:00: 15 Pa
  • Tue 12:40: 7 Pa
  • Wed 07:00: 14 Pa
  • Wed 12:40: 15 Pa
  • Thu 07:00: 16 Pa
  • Thu 12:40: 15 Pa
  • Fri 07:00: 14 Pa
  • Fri 12:40: 15 Pa

Readings in pascals, Monday to Friday at 07:00 and 12:40: 15, 14, 15, 7, 14, 15, 16, 15, 14, 15. All are at or above the 10 Pa low limit except Tuesday 12:40, which read 7 Pa. The other two room pairs stayed in range all week. 29 of 30 readings in range.

Illustrative. One reading out of 30: Tuesday 12:40 read 7 Pa because a cart held the airlock door open. The other two room pairs stayed inside their limits all week.
  • 3 room pairs, 10 readings each: 30 readings. Limits: assembly to gowning 10 to 25 Pa, gowning room to corridor 5 to 20 Pa, packing room to corridor 5 to 20 Pa.
  • Tuesday 12:40: assembly to gowning read 7 Pa, under its 10 Pa low limit. The gowning room read 13 Pa at the same time, its highest of the week: the sign of an open door between the two.
  • Found: a cart left in the airlock was holding the inner door open; the monitoring trend showed it open from 12:18. Door closed at 12:41, back to 15 Pa at 12:44.
  • Particle count in assembly at 12:50 was inside the room's limits. Open subassemblies on bench 2 were held until quality reviewed them, then released.
  • Lasting fix: a marked cart bay outside the airlock, 'airlock clear' added to the each-shift door check, and a shorter door-open alarm delay under change control.

29 of 30 readings in range = 96.7%, with 1 excursion of about 23 minutes. The number to track month to month is excursions and how long each lasted, not the percentage.

Common mistakes

  • Limits copied from a website

    A pressure, particle or temperature limit only means something if it comes from your room's design and qualification. Write your validated limits on the log; a number from a template is not one.

  • Logging a reading without acting on it

    A low reading written neatly on the log and left is a common gap. Out of limits means act now: close the door, stop entries, recheck, then record and raise it.

  • Watching gowning from inside

    Standing in the gowning room to check gowning adds a person, a body of air and a distraction. Watch through the window or a camera, against the posted order.

  • Mixing up classification and monitoring

    A current classification report does not show the room is in control today; the monitoring does. Check both, at their own frequencies.

  • Closing an excursion without the product question

    Every excursion needs someone from quality to decide what it meant for the product in the room at the time, and to write that down.

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FAQ

Cleanroom audit checklist: common questions

  1. Checks at four frequencies: each shift (pressure differentials, alarms, doors and airlocks, a watched gowning entry, materials in), weekly (cleaning log, disinfectant rotation, monitoring results and trends), per plan (ISO 14644-1 classification, filter integrity, airflow and recovery tests, calibration) and system checks (change control, excursions, training). This one has 33, each with what to look at.

  2. A common order is top to bottom: shoe covers at the step-over bench, hair cover, face mask, hood, coverall, boot covers, eyewear, then gloves last, finished with a mirror check. Your gowning SOP for each grade sets the actual order and garments, and the checklist checks people follow it.

  3. Rooms with continuous monitoring are watched all the time, with alarms; the checklist adds a recorded check of the readings and alarm history at the start of every shift. Rooms without it are read and logged at the frequency your monitoring plan sets, often at least once per shift. Use your own validated limits.

  4. ISO 14644-1 sets the cleanliness classes, ISO 1 to ISO 9, by airborne particle concentration and says how to test a room against its class. ISO 14644-2 covers monitoring the room afterwards to show it stays in control. Classification is a periodic test; monitoring is ongoing.

  5. No. It supports internal audits beside your quality system and your environmental monitoring program. Compliance with ISO 14644, EU GMP Annex 1 or FDA rules comes from your design, qualification, procedures and records, judged by your own quality team and your auditors.

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