Never Use Water from Unauthorized Sources in Pharmaceutical Manufacturing

Do Not Use Water from Unauthorized Sources in GMP Manufacturing

Remember: Never use water from non-qualified sources in GMP operations — doing so can cause contamination and result in severe regulatory violations.

Why This Matters in GMP

Water is the most widely used raw material in pharmaceutical manufacturing, used for cleaning, formulation, and as a component in many drug products. GMP standards require water to meet strict microbiological and chemical specifications depending on its application — e.g., purified water (PW) for non-sterile products and water for injection (WFI) for sterile products. Using water from unauthorized, unvalidated, or non-monitored sources risks introducing microbial load, particulates, or inorganic/organic contaminants into the product or manufacturing environment.

Also Read: Never Override HMI Control Panels During GMP Manufacturing Runs

Consider the case where tap water is mistakenly used to rinse equipment meant for sterile drug production. The uncontrolled bioburden and potential endotoxins could compromise the sterility of subsequent batches, rendering them unsafe for patient use. Water must be sourced only from validated systems that are subject to routine monitoring, maintenance, and qualification. Failure to control water quality is a major root cause of product recalls and facility shutdowns globally.

Regulatory and Compliance Implications

21 CFR Part 211.63 requires that equipment, including water

systems, be designed and maintained to prevent contamination. WHO GMP stipulates that only approved water types must be used in manufacturing, and EU GMP Annex 1 requires water systems to be validated and routinely tested. Use of unauthorized water is considered a critical GMP failure and is often classified as a serious breach during inspections.

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Auditors will assess water source qualification reports, microbial and chemical testing data, and maintenance logs. Any instance of unapproved water usage may lead to batch rejection, suspension of manufacturing, or warning letters. Regulatory bodies also expect risk assessments and documented justifications when water systems are modified or re-qualified.

Implementation Best Practices

Clearly define approved water sources and their intended use in SOPs. Color-code pipelines and label all water outlets with corresponding water grade. Implement strict access controls in utility rooms to prevent unauthorized use. Maintain logbooks for water usage in production areas with QA oversight.

Train personnel to understand water quality requirements and ensure sampling, monitoring, and alert thresholds are routinely reviewed. If alternate water sources are temporarily used during maintenance, implement change control and perform microbial and chemical verification before release. Ensure all water systems are included in the facility’s qualification master plan (QMP).

Regulatory References

– 21 CFR Part 211.63 – Equipment design and maintenance
– EU GMP Annex 1 – Manufacture of sterile medicinal products
– WHO TRS 970, Annex 2 – Pharmaceutical water systems
– USP – Water for Pharmaceutical Purposes