ISO INTERNATIONAL STANDARD 24525 First edition 2022-11 Drinking water, wastewater and stormwater systemsand services Operation and maintenance of on-site domestic wastewater services Systemes et services relatifs a I'eaupotable, aI'assainissementeta lagestiondeseauxpluviales-Fonctionnementetmaintenancedes servicesd'eauxuséesdomestiquessursite Referencenumber IS0 24525:2022(E) ISO @ISO2022 IS0 24525:2022(E) COPYRIGHTPROTECTEDDOCUMENT ISO2022 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 anyform or by anymeans, electronic or mechanical, including photocopying, orposting on theinternetoran intranet,withoutpriorwrittenpermission.Permissioncanberequestedfrom eitherIsoattheaddressbelow or ISO's member body in the country of the requester. ISO copyright office CP401 : Ch.de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +4122 749 0111 Email: [email protected] Website:www.iso.org Published in Switzerland ii @IS0 2022-All rights reserved