This is a ready-to-use performance qualification protocol for a pharmaceutical water system, structured as the three-phase qualification unique to water: prove the system, confirm the routine procedures, then demonstrate a full year across seasonal feedwater variation. Replace every <<FILL: ...>> placeholder, set your document numbers and dates, and route it through document control and approval. A filled specimen follows. Verify each cited regulation and compendial chapter against the current source. This is general guidance to adapt, not legal or regulatory advice.
Approval page
| Role | Name | Signature | Date |
|---|---|---|---|
| Author (Validation) | <<FILL>> | ||
| Reviewer (QC Microbiology) | <<FILL>> | ||
| Reviewer (Engineering / System Owner) | <<FILL>> | ||
| Approver (QA) | <<FILL>> |
| Field | Entry |
|---|---|
| Protocol number | <<FILL: PROT-ID, e.g. PQ-WFI-001>> |
| Water grade | <<FILL: Purified Water / Water for Injection>> |
| System / loop ID | <<FILL: system ID>> |
| Version | <<FILL: 1.0>> |
1. Objective
To demonstrate that the <<FILL: PW/WFI>> system consistently generates and distributes water meeting its compendial chemical attributes and microbial control levels at every point of use, under routine operation, and across a full year of seasonal feedwater variation.
2. Scope
Generation skid, storage, and the full distribution loop with all points of use listed in Attachment 1, across Phases 1 to 3. Prerequisite engineering qualification (IQ/OQ or the ASTM E2500 commissioning-and-qualification equivalent) is complete and approved before Phase 1 begins.
3. Prerequisites
- IQ/OQ (or C&Q) complete and approved; sanitization cycle developed.
- Analytical methods validated: conductivity (USP <645>), TOC (USP <643>), microbial recovery, and (WFI) bacterial endotoxin (USP <85>).
- Online conductivity and TOC analyzers calibrated; cell constant verified.
- Microbiology lab capacity, incubator space, and analyst availability confirmed for the daily sampling load.
4. Attributes and acceptance criteria
| Attribute | Method | PW criterion | WFI criterion |
|---|---|---|---|
| Conductivity | USP <645> Stage 1 (online) | Per temperature table | Per temperature table |
| TOC | USP <643> (online typical) | Not more than 500 ppb | Not more than 500 ppb |
| Microbial count | Membrane filtration / plate, low-nutrient agar | Action not more than 100 CFU/mL | Action not more than 10 CFU/100 mL |
| Endotoxin | USP <85> LAL | Not applicable | Not more than 0.25 EU/mL |
Alert levels are site-specific and set below the action levels using the qualification data. Conductivity and TOC are compendial limits; microbial counts are action levels that are trended, not pass/fail release specs.
5. Phase 1: intensive daily monitoring (2 to 4 weeks)
Purpose. Prove the system can consistently produce and deliver water of the required quality, and finalize the operating, sanitization, and monitoring SOPs.
| Item | Requirement |
|---|---|
| Duration | <<FILL: 14-28 days>> |
| Sampling | Every point of use plus key in-process points, every operating day |
| Attributes | Full set: conductivity, TOC, microbial (and endotoxin for WFI) |
| Water use | Not used for product manufacturing |
| Acceptance | All chemical results within limits; microbial within action levels; excursions investigated and resolved; SOPs and sanitization frequency finalized |
6. Phase 2: confirm under routine procedures (2 to 4 weeks)
Purpose. Demonstrate that, operated by the finalized routine SOPs and sanitization frequency from Phase 1, the system consistently produces compliant water.
| Item | Requirement |
|---|---|
| Duration | <<FILL: 14-28 days>> |
| Sampling | Every point of use, every operating day |
| Operation | Exactly as intended routinely (this is the difference from Phase 1) |
| Water use | Release for use often begins at the end of Phase 2 on a documented risk basis; WFI feeding sterile manufacturing is treated more conservatively |
| Acceptance | Consistent compliance under routine operation; sanitization frequency confirmed adequate; trends stable |
7. Phase 3: long-term, one full year
Purpose. Demonstrate reliable performance across seasonal feedwater variation.
| Item | Requirement |
|---|---|
| Duration | One full year from the start of routine operation |
| Sampling | Rotating schedule so every point of use is covered each defined period (e.g. weekly), with one or more points sampled daily |
| Attributes | Full set; trend everything; feed excursions to deviation/CAPA |
| Acceptance | Stable, in-control trends across a full annual cycle; monitoring frequency proven adequate; alert/action levels hold against real data |
At the end of Phase 3, transition to the routine ongoing monitoring program whose frequency the Phase 3 data justified.
8. Sampling plan (worked structure)
| Phase | Duration | Frequency | Points sampled | Water used for product? |
|---|---|---|---|---|
| Phase 1 | 14-28 days | Daily | All points every day | No |
| Phase 2 | 14-28 days | Daily | All points every day | Often at end, risk-based |
| Phase 3 | 1 year | Rotating | One or two daily; all covered each week | Yes |
Sample the way the water is actually used. If production draws water without a long flush, the qualification sampling reflects that, or the difference is defined and justified.
9. Test-result records (per sample)
| Field | Entry |
|---|---|
| Sample point / ID | <<FILL>> |
| Date/time | <<FILL>> |
| Conductivity (online, temp-comp) | <<FILL>> |
| TOC (ppb) | <<FILL>> |
| Microbial count | <<FILL>> |
| Endotoxin (WFI) | <<FILL>> |
| Within alert / action? | <<FILL>> |
| Analyst / reviewer | <<FILL>> |
10. Deviation and excursion handling
Any chemical out-of-limit or microbial action-level exceedance is recorded, investigated for impact and cause, and dispositioned before the phase is considered passed. A microbial trend rising toward the action level, even while in-control, is investigated, not ignored.
11. Water-release decision
State the rule: which results gate release, who decides (QA, on an impact assessment), and what happens to water made between a good result and a later failing one. <<FILL: the release rule>>.
12. Summary and conclusion
On completion of all three phases, the validation summary ties protocols to results, states any deviations and their disposition, confirms the ongoing monitoring frequency, and declares the system fit for use. <<FILL: complete at close>>.
13. References
USP <1231> Water for Pharmaceutical Purposes; the Purified Water and Water for Injection monographs; <645> Water Conductivity; <643> Total Organic Carbon; <85> Bacterial Endotoxins Test. European Pharmacopoeia monographs for Purified Water and Water for Injection. EU GMP Annex 1 (2022, effective 25 August 2023) contamination control strategy. 21 CFR 211.48 (plumbing) and Part 211; FDA Guide to Inspections of High Purity Water Systems. ISPE Baseline Guide Volume 4 (Water and Steam Systems); ASTM E2500.
Confirm the current version of each reference and each compendial chapter before issue.
Filled specimen
One executed Phase 1 sample record, illustrative only.
| Field | Entry |
|---|---|
| Sample point / ID | POU-07 (filling suite drop) |
| Date/time | 2026-06-08 07:40 |
| Conductivity (online, temp-comp) | 1.1 uS/cm at 20 C, within Stage 1 |
| TOC (ppb) | 120 |
| Microbial count | 0 CFU/100 mL |
| Endotoxin (WFI) | Less than 0.005 EU/mL |
| Within alert / action? | Yes, all within alert |
| Analyst / reviewer | A. Patel / R. Gomez |
This is one line of a Phase 1 record set that, across every point of use every day for the phase, builds the evidence that the system makes compliant water before any of it is released.
Common inspection findings this protocol prevents
- Declaring the system validated after a few clean weeks, skipping the full Phase 3 year, then a summer feedwater shift produces excursions no one anticipated.
- Sampling after a long flush when production does not flush, so the qualification samples cleaner water than is actually used.
- Sanitization frequency never justified by data, or a thermal cycle never mapped to the most distal point.
- Microbial trends rising below the action level, treated as “in spec” and never investigated.
How to adapt this protocol
- Set the grade, system, and document numbers, and list the real points of use in Attachment 1.
- Fix your phase durations, alert levels (derived from your data), and sanitization frequency.
- State your water-release decision rule explicitly and name the QA decision-maker.
- Confirm every compendial chapter and regulation against the current published version before issue.