Water hardness in Diamantino
29 mg/L soft
Tap water in Diamantino is soft: 29 mg/L (1.7 gpg · 1.6 °dH · 2.9 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Aguas Diamantino), CC BY-ND 3.0 (2025) · data checked 2026-10-20
Range across supply zones: 12–39 mg/L.
Tap water in Diamantino (Mato Grosso) is supplied by Aguas Diamantino. The published figure is 29.4 mg/L as calcium carbonate, which counts as soft water. Reported values range from 11.6 to 38.9 mg/L, so hardness at the tap can vary. The figure comes from the Ministry of Health's SISAGUA data for 2025.
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 | 29 mg/L |
|---|---|
| Utility | Aguas Diamantino |
How Diamantino compares
- Tap water in Diamantino is 31 % softer than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 1323 of 1915 in Brazil (1 = hardest); 31 % of these cities have softer water.
- In Mato Grosso it is number 24 of 46 cities; the regional median is 30 mg/L.
- Nearest city with clearly softer water: Arenápolis, 52 km away (22 mg/L).
- Nearest city with clearly harder water: Nobres, 115 km away (72 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 Diamantino
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 2 °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 Diamantino water hard or soft?
It is soft: 29 mg/L as CaCO₃ (1.7 gpg, 1.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Diamantino 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 Diamantino water?
1.7 gpg, equal to 1.6 °dH, 2.9 °fH or 29 mg/L calcium carbonate.
What dishwasher salt setting should I use in Diamantino?
For 29 mg/L (1.6 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Diamantino?
No. With soft water a softener adds nothing.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Aguas Diamantino), CC BY-ND 3.0 (2025). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Aguas Diamantino), CC BY-ND 3.0 · Outdated figure? Tell us