Water hardness in São Sepé
49 mg/L soft
Tap water in São Sepé is soft: 49 mg/L (2.9 gpg · 2.7 °dH · 4.9 °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: 48–49 mg/L.
São Sepé, in Rio Grande do Sul, is served by Companhia Riograndense De Saneamento. The 2026 Ministry of Health control data report 48.8 milligrams per litre, which is soft. Readings are very consistent, from 48.4 to 49.3.
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 | 49 mg/L |
|---|---|
| Utility | Companhia Riograndense De Saneamento |
How São Sepé compares
- Tap water in São Sepé is 15 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 828 of 1915 in Brazil (1 = hardest); 57 % of these cities have softer water.
- In Rio Grande do Sul it is number 163 of 244 cities; the regional median is 60 mg/L.
- Nearest city with clearly softer water: Faxinal do Soturno, 67 km away (39 mg/L).
- Nearest city with clearly harder water: Vila Nova do Sul, 33 km away (76 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 São Sepé
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 3 °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 São Sepé water hard or soft?
It is soft: 49 mg/L as CaCO₃ (2.9 gpg, 2.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in São Sepé 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 São Sepé water?
2.9 gpg, equal to 2.7 °dH, 4.9 °fH or 49 mg/L calcium carbonate.
What dishwasher salt setting should I use in São Sepé?
For 49 mg/L (2.7 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in São Sepé?
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