Public contracts of Communauté d'agglomération de Saint-Quentin-en-Yvelines · 2026

Réalisation du Schéma Directeur d’Assainissement et de Gestion des Eaux Pluviales (SDAGEP) de Saint-Quentin-en-Yvelines

€2M

maximum contract amount over 4 years — what was paid on it is not published

Signed on 6 March 2026 · running until about May 2030 · 4 yrs

Ongoing6 May 2030

That is at most ~€480k a year on average: a maximum too.

Who won it

NaldeoIngénierie, études techniques · registered office Lyon (69003) · headcount 100 to 199 employees · SIREN 319242731

The competition

4 bids received

Median for this procedure in 2026: 3 bids, across 8946 comparable contracts. Open tender · awarded to 1 company

Open data publishes the winner and the bid count — never the identity of unsuccessful bidders.

Number 12 by amount of the 45 contracts Communauté d'agglomération de Saint-Quentin-en-Yvelines published for 2026.

Contract details (procedure, price, amendments, lots)

Procedure : Appel d'offres ouvert

Price : Mixte

Published amendments : none

Subcontracting declared : yes

Contracts above €40,000 excluding VAT, as declared when they are awarded (DECP): contract amounts, not payments. Smaller contracts are not published; obviously wrong amounts are set aside.