Île-de-France · 347,443 residents · Chair: Pierre Fond

Communauté d'agglomération Saint Germain Boucles de Seine

€75.7 million spent in 2025.

€218 per resident · Urban-area groupings of the same size: €687

What Communauté d'agglomération Saint Germain Boucles de Seine spends, by policy

Waste, water and environment28%€20.9M
Streets and transport23%€17.4M
Town planning and housing10%€7.3M
Administration and shared services7%€5.5M
Culture, sport and youth3%€2.4M
Passed on to other bodies26%€20M

The 3 other items (3%)

Loans: repayments and interest2%€1.3M
Economy and trade1%€937k
Education< 1%€34k

Source: 2025 accounts of Communauté d'agglomération Saint Germain Boucles de Seine (DGFiP), by public policy.

Suppliers and recipients

The same €75.7M, by recipient.

Companies and contractors46%€34.6M
See the names ↓
Joint bodies and syndicates40%€30.6M
Staff6%€4.4M
Pay and contributions.
Grants and contributions5%€3.4M
Banks and lenders2%€1.3M
Compulsory contributions< 1%€101k
Other2%€1.2M
Councillors’ allowances, taxes paid, other costs.

Source: 2025 accounts of Communauté d'agglomération Saint Germain Boucles de Seine (DGFiP).

35 contracts signed in 2025 · €30.9M before tax

Why this total differs from the €34.6M paid to companies

These are the amounts of the contracts signed in the year, over their whole length, not what was paid. The money paid in a year also goes to older contracts and to purchases too small to be published (under €40,000 excl. VAT). For a framework agreement, the amount is a ceiling.

Investment and works

€11.6M of capital spending in 2025 (building, renovation, equipment), €33 per resident. Urban-area groupings of the same size: €114.

Travaux réseaux assainissement bezons chambourcy le vésinet2023–2024 · Eurovia Ile de France€2.2M
Terrassement voirie et réseaux divers2023–2024 · Tersen (Picheta Terrassement Picheta Demolition)€1.5M
Création déchetterie interco ouest et voie d’accès2023–2024 · Gagneraud Construction€1.2M
Travaux ASST etang la ville p Marmy marly le roi le mesnil SGL croissy2025 · J.R. Champion Travaux Publics€1.2M
Éclairages publics STL2025 · Satelec€1.1M

Largest works contracted since 2023, among published contracts. Amounts planned at signature, often spread over several years.

On top of that, €2.6M paid to other bodies for their own equipment (towns, intercommunalities, associations…).

Source: 2025 accounts of Communauté d'agglomération Saint Germain Boucles de Seine (DGFiP), by public policy.

Revenue and financing

Revenue: €79.3M · borrowing: €47k · spending: €75.7M.

Breakdown of resources

Taxes (business and household taxes, VAT share)43%€33.7M
State and other contributions42%€33.4M
Grants for works and VAT refunds8%€6M
Users and rents4%€2.8M
Other receipts4%€3.3M
Borrowing< 1%€47k

Source: OFGL, 2025 accounts of the main budget.

Debt and taxes

€70 of debt per resident

Urban-area groupings of the same size: €781

1.1 year of savings to repay it

2025 accounts. Debt and taxes: OFGL, consolidated (main and side budgets). Per resident: amount divided by the population (Insee). “Urban-area groupings of the same size”: median of the 94 urban-area groupings of 100,000 to 365,000 residents.

The levels above Communauté d'agglomération Saint Germain Boucles de Seine

Spending per resident in 2025, and what each level pays for.

IntercommunalityCommunauté d'agglomération Saint Germain Boucles de SeineWaste, water, urban transport, economic development
€218
RegionÎle-de-FranceHigh schools, regional trains, training, business support
€459

Each row: the body’s own spending per resident, the figure at the top of its page (DGFiP). Not to be added up: a grant from one level is spent by another.

Who is part of Communauté d'agglomération Saint Germain Boucles de Seine

Understanding these figures

Who does what

The intercommunality collects and treats waste, often runs water and sanitation, organises urban transport, and pays part of its revenue back to its member towns.

Official table of responsibilities (July 2025)

Why the levels are not added up

The same euro can appear twice: once when a region or a département pays a grant, again when the town spends it. Each page shows its own body’s spending.

Where these figures come from

Spending: the accounts of the main budget published by the DGFiP, by public policy. Revenue, debt and taxes: OFGL. Contracts: published contract data (DECP), amounts planned at signing.

Do you work for Communauté d'agglomération Saint Germain Boucles de Seine, or sit on its council? A figure to correct, context to add: write to us.

Page edited by Qipu, independent of Communauté d'agglomération Saint Germain Boucles de Seine · Sources and method

Accounts 2025 (DGFiP, OFGL). The method · See the source