Tap water hardness in Pará
We have published hardness data for 7 cities in Pará. The median is 149 mg/L; the hardest water is in Marituba (195 mg/L), the softest in Oriximiná (6 mg/L).
57 % 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 Pará, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Marituba | 195 | 195 | very hard |
| Belém | 165 | 165 | hard |
| Ananindeua | 153 | 153 | hard |
| Barcarena | 149 | 149 | hard |
| Curuçá | 18 | 18 | soft |
| Jacundá | 12 | 12 | soft |
| Oriximiná | 6 | 6 | soft |