Water hardness in Corinto
123 mg/L hard
Tap water in Corinto is hard: 123 mg/L (7.2 gpg · 6.9 °dH · 12.3 °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
Range across supply zones: 74–163 mg/L.
Corinto, in Minas Gerais, is supplied by Companhia De Saneamento De Minas Gerais. The 2025 Ministry of Health control data give 123.0 milligrams per litre, which is hard. Readings range from 73.6 to 163.0.
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 | 123 mg/L |
|---|---|
| Utility | Companhia De Saneamento De Minas Gerais |
How Corinto compares
- Tap water in Corinto is 189 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 111 of 1915 in Brazil (1 = hardest); 94 % of these cities have softer water.
- In Minas Gerais it is number 22 of 290 cities; the regional median is 41 mg/L.
- Nearest city with clearly softer water: Morro da Garça, 30 km away (87 mg/L).
- Nearest city with clearly harder water: Santo Hipólito, 45 km away (245 mg/L).
Ranking of the hardest and softest water in Brazil →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Corinto
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H2 |
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 Corinto water hard or soft?
It is hard: 123 mg/L as CaCO₃ (7.2 gpg, 6.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Corinto 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 Corinto water?
7.2 gpg, equal to 6.9 °dH, 12.3 °fH or 123 mg/L calcium carbonate.
What dishwasher salt setting should I use in Corinto?
For 123 mg/L (6.9 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Corinto?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
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