Mediates sulfate transport with high affinity (PubMed:12217875, PubMed:27210743). Mediates oxalate transport (PubMed:12217875). Mediates bicarbonate transport (PubMed:27210743). Does not accept succinate as cosubstrate (By similarity). Belongs to the SLC26A/SulP transporter (TC 2.A.53) family.