Water hardness in Santa Cruz do Sul
116 mg/L moderately hard
Tap water in Santa Cruz do Sul is moderately hard: 116 mg/L (6.8 gpg · 6.5 °dH · 11.6 °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: 33–139 mg/L.
Santa Cruz do Sul is supplied by Corsan in Rio Grande do Sul; the intake was not confirmed for this note. Records for 2026 give a median of 116.1 mg/L CaCO₃, with individual results from 33.1 to 138.8 mg/L. Check the utility's own report for your supply zone, since results can differ by address.
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 | 116 mg/L |
|---|---|
| Utility | Companhia Riograndense De Saneamento |
How Santa Cruz do Sul compares
- Tap water in Santa Cruz do Sul is 173 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 133 of 1915 in Brazil (1 = hardest); 93 % of these cities have softer water.
- In Rio Grande do Sul it is number 23 of 244 cities; the regional median is 60 mg/L.
- Nearest city with clearly softer water: Venâncio Aires, 20 km away (63 mg/L).
- Nearest city with clearly harder water: Marques de Souza, 45 km away (205 mg/L).
Ranking of the hardest and softest water in Brazil →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Santa Cruz do Sul
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Santa Cruz do Sul water hard or soft?
It is moderately hard: 116 mg/L as CaCO₃ (6.8 gpg, 6.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Santa Cruz do Sul 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 Santa Cruz do Sul water?
6.8 gpg, equal to 6.5 °dH, 11.6 °fH or 116 mg/L calcium carbonate.
What dishwasher salt setting should I use in Santa Cruz do Sul?
For 116 mg/L (6.5 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Santa Cruz do Sul?
Not essential; a scale inhibitor protects the heater cheaply.
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