Water hardness in Água Boa
67 mg/L moderately hard
Tap water in Água Boa is moderately hard: 67 mg/L (3.9 gpg · 3.7 °dH · 6.7 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia De Saneamento De Minas Gerais), CC BY-ND 3.0 (2025) · data checked 2026-10-20
Água Boa, in Minas Gerais, is supplied by Companhia De Saneamento De Minas Gerais. The reported hardness is 66.8 milligrams per litre, which falls in the moderate band. The figure comes from the 2025 Ministry of Health SISAGUA data, and no range is published for this town.
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 | 67 mg/L |
|---|---|
| Utility | Companhia De Saneamento De Minas Gerais |
How Água Boa compares
- Tap water in Água Boa is 57 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 523 of 1915 in Brazil (1 = hardest); 73 % of these cities have softer water.
- In Minas Gerais it is number 57 of 290 cities; the regional median is 41 mg/L.
- Nearest city with clearly softer water: Santa Maria do Suaçuí, 24 km away (49 mg/L).
- Nearest city with clearly harder water: Franciscópolis, 27 km away (130 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 Água Boa
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 4 °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 Água Boa water hard or soft?
It is moderately hard: 67 mg/L as CaCO₃ (3.9 gpg, 3.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Água Boa 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 Água Boa water?
3.9 gpg, equal to 3.7 °dH, 6.7 °fH or 67 mg/L calcium carbonate.
What dishwasher salt setting should I use in Água Boa?
For 67 mg/L (3.7 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Água Boa?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia De Saneamento De Minas Gerais), CC BY-ND 3.0 (2025). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Companhia De Saneamento De Minas Gerais), CC BY-ND 3.0 · Outdated figure? Tell us