Tap water hardness in Rondônia

We have published hardness data for 4 cities in Rondônia. The median is 19 mg/L; the hardest water is in São Miguel do Guaporé (28 mg/L), the softest in São Francisco do Guaporé (11 mg/L).

0 % of these cities have hard or very hard water (over 120 mg/L).

Portaria GM/MS nº 888/2021 sets a maximum of 300 mg/L CaCO₃ for total hardness (dureza total); operators report it in mg/L to SISAGUA.

Cities in Rondônia, hardest first

All cities in Brazil →