Grants for water management, decontamination and wastewater treatment
In brief
A business investing in water savings, stormwater management, industrial decontamination or wastewater treatment can access grants from the six French Water Agencies, supplemented by ADEME and several Regions. This page lists the schemes currently validated for this trade, with their funder and maximum amount where available.
This sector covers business investments related to water: water savings, stormwater recovery, reuse of non-conventional water, industrial decontamination and wastewater treatment.
France has six Water Agencies (Seine-Normandie, Adour-Garonne, Loire-Bretagne, Rhin-Meuse, Artois-Picardie, Rhône-Méditerranée-Corse), each responsible for its own river basin and with its own grant schemes for businesses.
ADEME supplements this support for the decontamination of industrial brownfield sites, and several Regions and intermunicipal bodies fund investment in water-saving equipment.
This page helps you identify relevant funding leads. However, it does not replace an individual check of your eligibility.
Run a personalised scan to identify the public grants and funding your company may be able to access.
What projects are covered?
The grants listed here fund water-saving equipment, stormwater management, the reduction or decontamination of industrial discharges, as well as studies prior to these investments.
What amount can you obtain?
The highest known amount reaches €15,000 for the Optim'eau scheme (Limoges Métropole); most Water Agency grants are calculated case by case depending on the project, with no public cap displayed.
How do you identify the funding suited to your business?
The breakdown by river basin makes manual selection complex: the relevant Water Agency depends on your precise location, not on your administrative Region.
The Capital OS scan automatically cross-references these criteria with the full database of referenced public grants, to identify the ones that genuinely concern you:
- Your precise location (river basin)
- The type of project (water savings, decontamination, wastewater treatment)
- Your sector of activity
Public grants for water management and decontamination
Page 1 of 2 — 31 grants in total
Optim'eau
Limoges Métropole
Up to €15,000
Aide à l'économie territoriale - Investissement dans les transitions
CC du Créonnais
Up to €10,000
Closes on 31 Dec 2028
Fonds d'aide à la transition écologique pour les TPE
CA Durance-Luberon-Verdon
Up to €10,000
Aide au financement d'équipements pour des économies d'eau
CCI de l'Oise
Up to €5,000
Aide aux artisans du BTP pour la gestion de l'eau
Agence de l'Eau Seine-Normandie, CMA Grand Est
Up to €3,500
Aide à la récupération des eaux de pluie
CC du Pays de Chantonnay
Up to €1,000
Aide à la gestion des eaux pluviales
Agence de l'Eau Seine-Normandie
Up to €100
Closes on 31 Dec 2030
Études et travaux de dépollution d’une friche – Fonds vert
ADEME
Closes on 31 Dec 2026
Accompagnement des filières et les territoires pour une transition alimentaire favorable à la ressource en eau
Agence de l'Eau Loire-Bretagne
Closes on 31 Dec 2030
Aide aux entreprises supportant une charge élevée de redevance sur la consommation d'eau potable au regard de leur valeur ajoutée
Ministère de la Transition écologique, de la biodiversité et des négociations internationales sur le climat et la nature
Closes on 1 Mar 2027
Aide aux opérations collectives
Agence de l'Eau Adour-Garonne
Closes on 31 Dec 2030
Aide aux opérations groupées sectorielles
Agence de l'Eau Rhône-Méditerranée-Corse
Closes on 31 Dec 2030
Aide aux économies d'eau
Agence de l'Eau Seine-Normandie
Closes on 31 Dec 2030
Aide aux économies d'eau
Agence de l'Eau Artois-Picardie
Closes on 31 Dec 2030
Aide aux économies et au recyclage de l'eau
Agence de l'Eau Adour-Garonne
Closes on 31 Dec 2030
Aide aux études
Agence de l'Eau Rhin-Meuse
Closes on 31 Dec 2030
Aide à l'accélération des économies d’eau et à la réduction des prélèvements
Agence de l'Eau Loire-Bretagne
Closes on 31 Dec 2030
Aide à l'efficacité hydrique des entreprises
Région Nouvelle-Aquitaine
Aide à la dépollution industrielle
Agence de l'Eau Seine-Normandie
Closes on 31 Dec 2030
Aide à la gestion intégrée des eaux pluviales
Agence de l'Eau Adour-Garonne
Closes on 31 Dec 2030
Human-validated links (AideTagLink, VALIDATED status only — unreviewed proposals are never shown here). Sorted by amount, highest first (then by internal identifier to break ties between the many identical titles). 1 additional grant(s) linked but currently closed, not listed.
Frequently asked questions about water management grants
What public grants exist for water management in business?
31 open schemes are listed for this trade on Capital OS, run by the six Water Agencies, ADEME and several Regions.
The full list is presented above on this page, with the funder and the maximum amount of each grant where known.
How do I know which Water Agency applies to me?
Each Water Agency covers a specific river basin, which does not always match the administrative boundaries of your Region.
A personalized assessment identifies the Water Agency responsible for your location and the schemes it actually offers for your project.
Is my business eligible for these grants?
It depends on each scheme: some target a specific sector (food processing, construction), others are open to any business depending on the basin.
This page does not presume your business's eligibility; the personalized assessment checks it based on your actual criteria.
How do I apply for this type of grant?
The application is made directly with the relevant Water Agency, ADEME or the relevant Region.
A personalized assessment first identifies the schemes genuinely relevant to your business, before you start the process.
This sector may match yours
Check the grants suited to your company
This page lists the schemes associated with this sector. The personalised report applies your real criteria — industry, size, location, project — before drawing any conclusion on eligibility.
See the opportunities identified by the scan, then access your personalised report.