Water hardness in Nova Petrópolis
43 mg/L soft
Tap water in Nova Petrópolis is soft: 43 mg/L (2.5 gpg · 2.4 °dH · 4.3 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia Riograndense De Saneamento), CC BY-ND 3.0 (2026) · data checked 2026-10-20
Range across supply zones: 23–76 mg/L.
Companhia Riograndense De Saneamento supplies Nova Petrópolis in Rio Grande do Sul. Reported hardness is 42.8 mg/L as CaCO₃ and ranges from 23.2 to 75.5 mg/L, so the water is soft. The data are from the Ministry of Health's SISAGUA monitoring, 2026.
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.
Water data
| Total hardness | 43 mg/L |
|---|---|
| Utility | Companhia Riograndense De Saneamento |
How Nova Petrópolis compares
- Tap water in Nova Petrópolis is close to the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 953 of 1915 in Brazil (1 = hardest); 50 % of these cities have softer water.
- In Rio Grande do Sul it is number 180 of 244 cities; the regional median is 60 mg/L.
- Nearest city with clearly softer water: Farroupilha, 30 km away (26 mg/L).
- Nearest city with clearly harder water: Picada Café, 10 km away (98 mg/L).
Ranking of the hardest and softest water in Brazil →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Nova Petrópolis
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 2 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Nova Petrópolis water hard or soft?
It is soft: 43 mg/L as CaCO₃ (2.5 gpg, 2.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Nova Petrópolis safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. 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.
How many grains per gallon is Nova Petrópolis water?
2.5 gpg, equal to 2.4 °dH, 4.3 °fH or 43 mg/L calcium carbonate.
What dishwasher salt setting should I use in Nova Petrópolis?
For 43 mg/L (2.4 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Nova Petrópolis?
No. With soft water a softener adds nothing.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia Riograndense De Saneamento), CC BY-ND 3.0 (2026). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Companhia Riograndense De Saneamento), CC BY-ND 3.0 · Outdated figure? Tell us