Water hardness in Serafina Corrêa
36 mg/L soft
Tap water in Serafina Corrêa is soft: 36 mg/L (2.1 gpg · 2 °dH · 3.6 °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: 32–71 mg/L.
Serafina Corrêa, in Rio Grande do Sul, is served by Companhia Riograndense de Saneamento. The 2026 figure is 36.2 milligrams per litre as calcium carbonate, which is soft. Reported values run from 32.1 to 70.7 milligrams per litre.
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 | 36 mg/L |
|---|---|
| Utility | Companhia Riograndense De Saneamento |
How Serafina Corrêa compares
- Tap water in Serafina Corrêa is 15 % softer than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 1150 of 1915 in Brazil (1 = hardest); 40 % of these cities have softer water.
- In Rio Grande do Sul it is number 206 of 244 cities; the regional median is 60 mg/L.
- Nearest city with clearly softer water: Nova Prata, 34 km away (25 mg/L).
- Nearest city with clearly harder water: Nova Bassano, 12 km away (64 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 Serafina Corrêa
| 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 Serafina Corrêa water hard or soft?
It is soft: 36 mg/L as CaCO₃ (2.1 gpg, 2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Serafina Corrêa 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 Serafina Corrêa water?
2.1 gpg, equal to 2 °dH, 3.6 °fH or 36 mg/L calcium carbonate.
What dishwasher salt setting should I use in Serafina Corrêa?
For 36 mg/L (2 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Serafina Corrêa?
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