1.3. Criteria for microbiological analyses at source
These analyses shall include: a demonstration of the absence of parasites and pathogenic micro-organisms; a quantitative determination of the revivable colony count indicative of faecal contamination: absence of Escherichia coli and other coliforms in 250 ml at 37 °C and 44,5 °C; absence of faecal streptococci in 250 ml; absence of sporulated sulphite-reducing anaerobes in 50 ml; absence of Pseudomonas aeruginosa in 250 ml; determination of the revivable total colony count per ml of water: at 20 to 22 °C in 72 hours on agar-agar or an agar-gelatine mixture; at 37 °C in 24 hours on agar-agar.
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Source: EUR-Lex (Cellar) · retrieved 2026-11-10 · Text as adopted (Official Journal); later amendments are not incorporated in this text.