Environmental modeling is increasingly more integrative and collabo rative work. The Internet and Web hold a promise of a shared environ mental infor mation infrastructure, which supports modeling. While the tradi tional (enterprise) information system architectures have not been much em ployed in the environmen tal domain, new standards-based Web technologies create an opportunity. At the same time the modeling workflows are being in vestigated, and this work may provide a fruitful starting point for new kind of top-down services that support modeling within environmental information in frastructures.