Water hardness in Quaraí
117 mg/L moderately hard
Tap water in Quaraí is moderately hard: 117 mg/L (6.8 gpg · 6.5 °dH · 11.7 °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: 62–144 mg/L.
Quaraí, in Rio Grande do Sul, is served by Companhia Riograndense De Saneamento. The 2026 Ministry of Health control data report 116.6 milligrams per litre, which is moderate. Readings range from 61.8 to 143.6.
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 | 117 mg/L |
|---|---|
| Utility | Companhia Riograndense De Saneamento |
How Quaraí compares
- Tap water in Quaraí is 174 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 132 of 1915 in Brazil (1 = hardest); 93 % of these cities have softer water.
- In Rio Grande do Sul it is number 22 of 244 cities; the regional median is 60 mg/L.
- Nearest city with clearly softer water: Uruguaiana, 69 km away (50 mg/L).
- Nearest city with clearly harder water: Barra do Quaraí, 112 km away (183 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 Quaraí
| 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 Quaraí water hard or soft?
It is moderately hard: 117 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 Quaraí 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 Quaraí water?
6.8 gpg, equal to 6.5 °dH, 11.7 °fH or 117 mg/L calcium carbonate.
What dishwasher salt setting should I use in Quaraí?
For 117 mg/L (6.5 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Quaraí?
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