EN IS0 23196 EUROPEANSTANDARD NORME EUROPEENNE EUROPAISCHE NORM August 2023 ICS 13.060.70 English Version Water quality - Calculation of biological equivalence (BEQ) concentrations (IS0 23196:2022) Qualite de I'eau - Calcul des concentrations en Wasserbeschaffenheit-Berechnung biologischer équivalent biologique (BEQ) (IS0 23196:2022) Aquivalenzkonzentrationen (BEQ) (IS0 23196:2022) This European Standard was approved by CEN on 21 August 2023. European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status asthe official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkiye and United Kingdom. cer EUROPEAN COMMITTEEFORSTANDARDIZATION COMITEEUROPEENDENORMALISATION EUROPAISCHESKOMITEEFURNORMUNG CEN-CENELECManagementCentre:RuedelaScience23,B-1040Brussels 2023CEN All rights of exploitation in any form and by any means reserved Ref. No. EN IS0 23196:2023 E worldwide for CEN national Members EN IS0 23196:2023 (E) Contents Page European foreword... 2 EN IS0 23196:2023 (E) Europeanforeword The text of IS0 23196:2022 has been prepared by Technical Committee IS0/TC 147"Water quality"of by Technical Committee CEN/TC 230"Water analysis" the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2024, and conflicting national standards shall be withdrawn at the latest by February 2024. Attention is drawn to thepossibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. Any feedback and questions on this document should be directed to the users'national standards body. AcompletelistingofthesebodiescanbefoundontheCENwebsite. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkiye and the United Kingdom. Endorsementnotice The text ofIS023196:2022hasbeen approved by CEN as EN IS023196:2023without anymodification. 3