Data for: Hydrogen and Oxygen Stable Isotopes in Brazilian Tap Water

Here we present the first dataset for tapwater in Brazil. We collected 575 tap water samples across the Brazilian territory and analyzed them for δ18O and δ2H using a pyrolysis technique coupled with an isotopic ratio mass spectrometer for isotope ratio determination. The δ2H ranged from -63.9 to +15.4‰ and, the δ18O ranged from -9.25‰ to +3.74‰.