Water hardness in São José do Rio Claro
28 mg/L soft
Tap water in São José do Rio Claro is soft: 28 mg/L (1.7 gpg · 1.6 °dH · 2.8 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Saa), CC BY-ND 3.0 (2025) · data checked 2026-10-20
Range across supply zones: 2–43 mg/L.
São José do Rio Claro, in Mato Grosso, is served by Saa. The reported hardness is 28.4 milligrams per litre as calcium carbonate, which is soft, with readings between 1.5 and 43.0. The figure is from the Ministry of Health's 2025 data.
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 | 28 mg/L |
|---|---|
| Utility | Saa |
How São José do Rio Claro compares
- Tap water in São José do Rio Claro is 33 % softer than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 1350 of 1915 in Brazil (1 = hardest); 29 % of these cities have softer water.
- In Mato Grosso it is number 27 of 46 cities; the regional median is 30 mg/L.
- Nearest city with clearly softer water: Arenápolis, 106 km away (22 mg/L).
- Nearest city with clearly harder water: Nobres, 150 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 São José do Rio Claro
| 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 São José do Rio Claro water hard or soft?
It is soft: 28 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 São José do Rio Claro 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 São José do Rio Claro water?
1.7 gpg, equal to 1.6 °dH, 2.8 °fH or 28 mg/L calcium carbonate.
What dishwasher salt setting should I use in São José do Rio Claro?
For 28 mg/L (1.6 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in São José do Rio Claro?
No. With soft water a softener adds nothing.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Saa), CC BY-ND 3.0 (2025). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Saa), CC BY-ND 3.0 · Outdated figure? Tell us