{"id":357863,"date":"2025-05-20T22:18:13","date_gmt":"2025-05-20T21:18:13","guid":{"rendered":"https:\/\/realites.com.tn\/fr\/?p=357863"},"modified":"2025-05-20T22:18:13","modified_gmt":"2025-05-20T21:18:13","slug":"eaux-usees-en-tunisie-quel-bilan-pour-lonas-en-2024","status":"publish","type":"post","link":"https:\/\/realites.com.tn\/fr\/eaux-usees-en-tunisie-quel-bilan-pour-lonas-en-2024\/","title":{"rendered":"Eaux us\u00e9es en Tunisie : Quel bilan pour l\u2019ONAS en 2024 ?"},"content":{"rendered":"

L\u2019Office National de l\u2019Assainissement (ONAS) a g\u00e9r\u00e9 en 2024 un volume de 295 millions de m\u00e8tres cubes d\u2019eaux us\u00e9es trait\u00e9es dans ses stations d\u2019\u00e9puration. Parmi cette quantit\u00e9, 64,9 millions de m\u00e8tres cubes ont \u00e9t\u00e9 r\u00e9utilis\u00e9s, selon les donn\u00e9es relay\u00e9es par Nova. Les eaux r\u00e9employ\u00e9es se r\u00e9partissent entre des usages directs, avec 18,66 millions de m\u00e8tres cubes, et des usages indirects, avec 46,31 millions de m\u00e8tres cubes.
\nSur l\u2019ensemble des eaux trait\u00e9es, 72,5 %, soit 195,46 millions de m\u00e8tres cubes, r\u00e9pondent aux normes de qualit\u00e9 requises. En revanche, 27,5 % pr\u00e9sentent des non-conformit\u00e9s. Ces \u00e9carts s\u2019expliquent par plusieurs facteurs, notamment la variation de la qualit\u00e9 des eaux dans certaines stations, le vieillissement des infrastructures, leur saturation ainsi que le rejet d\u2019eaux industrielles pollu\u00e9es dans les r\u00e9seaux d\u2019assainissement.
\nEn 2024, 11,12 millions de m\u00e8tres cubes d\u2019eaux trait\u00e9es ont \u00e9t\u00e9 utilis\u00e9s pour l\u2019irrigation de 29 p\u00e9rim\u00e8tres agricoles, couvrant une superficie de 7 590 hectares. Ces eaux ont principalement servi \u00e0 la culture de fourrages et d\u2019arbres fruitiers, repr\u00e9sentant 17,13 % du volume total r\u00e9utilis\u00e9. Par ailleurs, neuf terrains de golf ont \u00e9t\u00e9 irrigu\u00e9s avec 6,94 millions de m\u00e8tres cubes, soit 10,7 % de l\u2019eau recycl\u00e9e. Les espaces verts ont quant \u00e0 eux consomm\u00e9 0,59 million de m\u00e8tres cubes, correspondant \u00e0 1 % du total. Une partie des eaux trait\u00e9es a \u00e9galement \u00e9t\u00e9 utilis\u00e9e pour la recharge des nappes phr\u00e9atiques, notamment dans le cadre du projet de Korba, dans le gouvernorat de Nabeul.
\nL\u2019ONAS \u0153uvre actuellement \u00e0 la r\u00e9habilitation et \u00e0 la modernisation de ses stations d\u2019\u00e9puration afin d\u2019am\u00e9liorer la qualit\u00e9 des eaux trait\u00e9es. L\u2019objectif est d\u2019atteindre un taux de conformit\u00e9 de 80 % dans les prochaines ann\u00e9es, conform\u00e9ment \u00e0 son plan strat\u00e9gique. Ces efforts visent \u00e0 optimiser la gestion des ressources hydriques dans un contexte de pression croissante sur cette ressource.<\/p>\n","protected":false},"excerpt":{"rendered":"

L\u2019Office National de l\u2019Assainissement (ONAS) a g\u00e9r\u00e9 en 2024 un volume de 295 millions de m\u00e8tres cubes d\u2019eaux us\u00e9es trait\u00e9es dans ses stations d\u2019\u00e9puration. Parmi cette quantit\u00e9, 64,9 millions de…<\/p>\n","protected":false},"author":81,"featured_media":307311,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3,2508],"tags":[],"class_list":["post-357863","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-la-une","category-environnement"],"yoast_head":"\nEaux us\u00e9es en Tunisie : Quel bilan pour l\u2019ONAS en 2024 ? - R\u00e9alit\u00e9s Magazine<\/title>\n<meta name=\"description\" content=\"L\u2019Office National de l\u2019Assainissement (ONAS) a g\u00e9r\u00e9 en 2024 un volume de 295 millions de m\u00e8tres cubes d\u2019eaux us\u00e9es trait\u00e9es dans ses stations d\u2019\u00e9puration.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/realites.com.tn\/fr\/eaux-usees-en-tunisie-quel-bilan-pour-lonas-en-2024\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Eaux us\u00e9es en Tunisie : Quel bilan pour l\u2019ONAS en 2024 ? 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