Water hardness in Tabapuã
66 mg/L moderately hard
Tap water in Tabapuã is moderately hard: 66 mg/L (3.9 gpg · 3.7 °dH · 6.6 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Prefeitura Municipal De Tabapua), CC BY-ND 3.0 (2024) · data checked 2026-10-20
Range across supply zones: 36–136 mg/L.
Prefeitura Municipal De Tabapua supplies Tabapuã in São Paulo state. Reported hardness is 66.0 milligrams per litre as calcium carbonate, which is moderate. The 2024 readings range from 36.0 to 136.0 milligrams per litre.
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 | 66 mg/L |
|---|---|
| Utility | Prefeitura Municipal De Tabapua |
How Tabapuã compares
- Tap water in Tabapuã is 55 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 531 of 1915 in Brazil (1 = hardest); 72 % of these cities have softer water.
- In São Paulo it is number 147 of 530 cities; the regional median is 42 mg/L.
- Nearest city with clearly softer water: Embaúba, 17 km away (43 mg/L).
- Nearest city with clearly harder water: Catiguá, 16 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 Tabapuã
| 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 Tabapuã water hard or soft?
It is moderately hard: 66 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 Tabapuã 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 Tabapuã water?
3.9 gpg, equal to 3.7 °dH, 6.6 °fH or 66 mg/L calcium carbonate.
What dishwasher salt setting should I use in Tabapuã?
For 66 mg/L (3.7 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Tabapuã?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Prefeitura Municipal De Tabapua), CC BY-ND 3.0 (2024). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Prefeitura Municipal De Tabapua), CC BY-ND 3.0 · Outdated figure? Tell us