ISO INTERNATIONAL STANDARD 20468-4 First edition 2021-05 Guidelines for performance evaluation of treatment technologies for water reuse systems - Part 4: UV Disinfection Lignes directrices pour I'évaluation des performances des techniques de traitement des systemes de réutilisation de I'eau Partie 4: Desinfection aux UV Reference number IS0 20468-4:2021(E) OS1 @ IS0 2021 IS0 20468-4:2021(E) COPYRIGHTPROTECTEDDOCUMENT IS02021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or ISo's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland i @ IS0 2021 - All rights reserved