Tap water hardness in Paraná
We have published hardness data for 26 cities in Paraná. The median is 47 mg/L; the hardest water is in Ivaí (300 mg/L), the softest in Santa Mônica (6 mg/L).
4 % 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 Paraná, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Ivaí | 300 | 300 | very hard |
| Nova Fátima | 117 | 117 | moderately hard |
| Sarandi | 114 | 114 | moderately hard |
| Jardim Olinda | 88 | 88 | moderately hard |
| Marquinho | 80 | 80 | moderately hard |
| Jaguapitã | 78 | 78 | moderately hard |
| Sertanópolis | 65 | 65 | moderately hard |
| Mariluz | 58 | 58 | soft |
| Marechal Cândido Rondon | 58 | 58 | soft |
| Marumbi | 56 | 56 | soft |
| Flórida | 54 | 54 | soft |
| Jussara | 48 | 48 | soft |
| Santa Cecília do Pavão | 48 | 48 | soft |
| Colorado | 47 | 47 | soft |
| Iguaraçu | 42 | 42 | soft |
| São Jorge do Ivaí | 38 | 38 | soft |
| Peabiru | 36 | 36 | soft |
| Japurá | 35 | 35 | soft |
| Quatro Pontes | 34 | 34 | soft |
| Tupãssi | 29 | 29 | soft |
| Ribeirão Claro | 26 | 26 | soft |
| Tapejara | 24 | 24 | soft |
| Santa Isabel do Ivaí | 17 | 17 | soft |
| São Jerônimo da Serra | 15 | 15 | soft |
| Jaguariaíva | 8 | 8 | soft |
| Santa Mônica | 6 | 6 | soft |