- Quality Assurance (QA) : A Quality Assurance (QA) is Quality Assurance is a way to see that QC is maintained and is we are monitoring the right things to detect changes in water quality.

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Other /More definition:
A quality assurance (QA) is "An integrated system of activities involving planning, quality control, quality assessment, reporting and quality improvement to ensure that a product or service meets defined standards of quality with a stated level of confidence" (QAMS 1993, 7).

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Other /More definition:
A quality assurance (QA) is an integrated system of management activities involving planning, implementation, assessment, reporting, and quality improvement to ensure that a process, item, or service is of the type and quality needed and expected by the client.

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Other /More definition:
Quality Assurance (QA) is a An integrated system of management activities (planning, implementation, assessment, reporting, and quality improvement) that focuses on providing confidence in the data or product by ensuring that it is of the type and worth needed and expected by the client.