Water hardness in Jaguariúna
71 mg/L moderately hard
Tap water in Jaguariúna is moderately hard: 71 mg/L (4.1 gpg · 4 °dH · 7.1 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Prefeitura Municipal De Jaguariuna), CC BY-ND 3.0 (2026) · data checked 2026-10-20
Range across supply zones: 39–94 mg/L.
Jaguariúna's municipal prefecture reports a median of 70.6 mg/L CaCO₃, with samples from 38.5 to 94.2 mg/L. This is moderate hardness, and the spread means individual readings can be soft or near the upper end. The source does not say where the water comes from. Some scale on appliances is possible.
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 | 71 mg/L |
|---|---|
| Utility | Prefeitura Municipal De Jaguariuna |
How Jaguariúna compares
- Tap water in Jaguariúna is 66 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 462 of 1915 in Brazil (1 = hardest); 76 % of these cities have softer water.
- In São Paulo it is number 117 of 530 cities; the regional median is 42 mg/L.
- Nearest city with clearly softer water: Holambra, 11 km away (9 mg/L).
- Nearest city with clearly harder water: Santo Antônio de Posse, 12 km away (90 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 Jaguariúna
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 4 °dH |
| AEG / Electrolux | 2 |
| Beko | 1st |
| 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 Jaguariúna water hard or soft?
It is moderately hard: 71 mg/L as CaCO₃ (4.1 gpg, 4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Jaguariúna 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 Jaguariúna water?
4.1 gpg, equal to 4 °dH, 7.1 °fH or 71 mg/L calcium carbonate.
What dishwasher salt setting should I use in Jaguariúna?
For 71 mg/L (4 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Jaguariúna?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Prefeitura Municipal De Jaguariuna), CC BY-ND 3.0 (2026). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Prefeitura Municipal De Jaguariuna), CC BY-ND 3.0 · Outdated figure? Tell us