Polymer-supported 2,2'-biarylpyridine copper complexes were prepared and found to promote the Huisgen [3+2] cycloaddition reaction between azides and alkynes in water to give the corresponding triazoles in up to 95% isolated yield. The catalyst was recovered and reused several times without any loss in catalytic activity. ICP-AES analysis of the aqueous phase revealed barely detectable levels of copper residue.