EN ISO 8199:2018 PDF

Overview

EN ISO 8199:2018 - Water quality: General requirements and guidance for microbiological examinations by culture (ISO 8199:2018) provides standardized requirements and practical guidance for the common manipulations used in culture‑based microbiological testing of water. It covers preparation of samples, diluents and culture media, sterilization and decontamination of apparatus, enumeration and detection techniques by culture, and criteria for choosing an appropriate culture method. This standard is primarily aimed at examinations for bacteria, yeasts and moulds, while some provisions also apply to bacteriophages, viruses and parasites. It explicitly excludes non‑culture methods such as PCR.

Key technical topics and requirements

• Scope and principle: Defines the purpose and limits of culture‑based microbiological examinations for water quality assessment.
• General measurement requirements: Guidance on uniform temperatures, incubation times, and reliable reporting of volumes and masses.
• Diluents and culture media: Quality requirements for ingredients, preparation and reference to media quality control aligned with ISO 11133.
• Sterilization and decontamination: Procedures for sterilizing glassware, apparatus and consumables and for safe waste management.
• Sample handling: Best practices for sampling, sample preparation (including aqueous matrices and swabs), transport and storage prior to culture.
• Enumeration (quantitative) methods: Description of pour plate, spread plate, membrane filtration, liquid‑medium enumeration and MPN approaches, plus incubation, counting, calculation and expression of results.
• Detection (qualitative) methods: Procedures for presence/absence testing and interpretation of culture‑based detection.
• Performance characteristics and analytical quality control (AQC): Internal process controls, external quality assessment and guidance on uncertainty of test results.
• Annexes and calculation support: Informative criteria for technique choice, confidence intervals for colony counts, calculation methods and diluent compositions.

Practical applications and users

EN ISO 8199:2018 is intended for:

• Water testing laboratories and environmental microbiology labs
• Public health and regulatory agencies monitoring drinking, recreational and wastewater
• Utilities (drinking water suppliers, wastewater treatment plants)
• Laboratory managers, microbiologists and QA/QC personnel implementing culture‑based testing programs

Use cases include routine bacterial counts, detection of indicator organisms, compliance testing, method selection and laboratory quality assurance.

Related standards

• ISO 11133 (culture media and diluent preparation and QC) - referenced and aligned for media quality.
• National and European implementations (EN ISO 8199) - adopted by CEN members including SIST for Slovenia.

Keywords: EN ISO 8199:2018, water quality, microbiological examinations by culture, culture techniques, membrane filtration, pour plate, spread plate, enumeration, detection, analytical quality control.