How can you finance a water-saving or pollution clean-up project with the Agence de l'eau Seine-Normandie?

Key points

The 2025-2030 programme funds various projects for water and biodiversity. The official forms page states a deadline of 30 September 2026 to guarantee that a complete application would be reviewed in 2026: as of 13 October, contact the Agency to find out the procedure and timeline applicable to new submissions.

What projects are covered?

The focus areas include reducing industrial pollution, preventing accidental pollution, clean technologies, reducing water withdrawals, reusing treated wastewater or other non-conventional resources, and on-site rainwater infiltration. The project must demonstrably contribute to the programme's objectives and be located within the Seine-Normandie basin.

1. Grant for construction tradespeople for water management

This fact sheet targets building tradespeople located within the Agency's territory. The support can combine a personalised diagnostic, advice and investments in more water-efficient equipment. The database mentions a grant of 60 to 70% of eligible expenses, for an amount of €3,500 incl. VAT. These parameters must be confirmed with the CMA (Chamber of Trades and Crafts) and the Agency: the territorial scope, eligible expenses, payment terms and end date must be checked.

2. Water savings grant

This grant targets businesses that significantly reduce their water withdrawals or improve their water consumption per unit produced. It can cover studies and works, switching supply to a lower-quality resource where several stakeholders are involved, and projects to reuse treated wastewater or non-conventional water sources. The amount depends on the project. It is essential to quantify the baseline consumption, the expected savings, the quality required, and any health or regulatory constraints.

3. Industrial pollution clean-up grant

This fact sheet targets studies and works to address conventional pollution, micro-pollutants and accidental pollution. Operations can cover clean technologies, process changes, pre-treatment or treatment of effluents, prevention of accidental discharges, self-monitoring, or management of polluted stormwater. Support is determined on a case-by-case basis. You need to describe the flows involved, the reduction targets, the technical alternatives and the expected level of performance.

4. Stormwater management grant

This scheme encourages source control of rainfall, infiltration as close as possible to the point where it falls, and maintaining or increasing planted, unsealed ground. Operations can include de-sealing car parks, creating swales, ditches or permeable pavements, and disconnecting stormwater from wastewater networks. The database mentions a grant ranging from €25 to €100 per m² depending on the project's ambition; the scale, the surfaces counted and the design criteria must be confirmed in the official fact sheet.

Who can benefit from the grants?

All four fact sheets in the database target businesses, with a specific scheme for construction tradespeople. Eligibility depends on the applicant's status, the site's location, the activity, the impact on water resources, and the works envisaged. Some projects may require authorisations, preliminary studies, or coordination with the local authority and the wastewater network operator.

How do you submit an application?

1. Contact the project officer at the relevant territorial department and present the project.
2. Identify the fact sheet matching the need: water savings, pollution clean-up, stormwater, or construction trade support.
3. Prepare the baseline data, measurable objectives, quotes, studies and financing plan.
4. Submit a complete application via the current official procedure, then keep the acknowledgement of receipt.
5. Wait for written instructions before ordering the works or signing a legal commitment.

Documents to prepare

Depending on the project: description of the site and processes, water consumption and volumes withdrawn, discharge analyses, technical study, quotes, surface plans, calculation of volumes infiltrated or saved, timeline, financing plan, business supporting documents, and applicable authorisations. The precise requirements are those of the fact sheet and the project officer.

Timeline and points to watch in 2026

The official forms page states that, to be guaranteed review in 2026, complete applications had to be submitted via Démarche Numérique before 30 September. That date has passed. This does not mean that all schemes are permanently closed, but a new applicant must contact the Agency to confirm whether submission is still possible, processing times, and the 2027 timeline. Do not treat a fact sheet in the database as a guarantee that a scheme is open.

Is the programme still in force?

The "Eau, climat & biodiversité" ("Water, climate & biodiversity") programme covers 2025-2030. However, the review of new applications depends on the applicable dates, procedures and budget allocations; the review date announced for 2026 has passed.

Can a quote be signed before submitting an application?

As a precaution, no: grant rules generally require the application to precede the legal commitment. Confirm the precise rule with the Agency before signing an order or a quote.

Are the stated rates guaranteed?

No. The rates or amounts in the catalogue are reference indications. The Agency determines the funding base and the support according to the scheme, the project and the applicable rules.

Does stormwater management cover company car parks?

It can cover de-sealing and rainwater infiltration, in particular on car parks, if the project meets the scheme's technical and design criteria.

Official sources

• Financial support for businesses — 2025-2030 programme — Agence de l'eau Seine-Normandie
• Grant application forms and supporting documents — Agence de l'eau Seine-Normandie
• Eau, climat & biodiversité programme 2025-2030 — Agence de l'eau Seine-Normandie
• Eau, climat & biodiversité partnership agreement — Agence de l'eau Seine-Normandie
• New financial support for building tradespeople in the Seine-Normandie basin — CMA Grand Est