Water hardness in Firminópolis
44 mg/L soft
Tap water in Firminópolis is soft: 44 mg/L (2.6 gpg · 2.5 °dH · 4.4 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Saneamento De Goias Sa), CC BY-ND 3.0 (2025) · data checked 2026-10-20
Range across supply zones: 20–68 mg/L.
Firminópolis, in Goiás, is served by Saneamento De Goias Sa. Reported hardness is 44.0 milligrams per litre as calcium carbonate, which is soft. The 2025 readings vary widely, from 20.0 to 68.0 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 | 44 mg/L |
|---|---|
| Utility | Saneamento De Goias Sa |
How Firminópolis compares
- Tap water in Firminópolis is close to the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 923 of 1915 in Brazil (1 = hardest); 51 % of these cities have softer water.
- In Goiás it is number 58 of 131 cities; the regional median is 41 mg/L.
- Nearest city with clearly softer water: Turvânia, 18 km away (29 mg/L).
- Nearest city with clearly harder water: São Luís de Montes Belos, 22 km away (78 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 Firminópolis
| 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 Firminópolis water hard or soft?
It is soft: 44 mg/L as CaCO₃ (2.6 gpg, 2.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Firminópolis 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 Firminópolis water?
2.6 gpg, equal to 2.5 °dH, 4.4 °fH or 44 mg/L calcium carbonate.
What dishwasher salt setting should I use in Firminópolis?
For 44 mg/L (2.5 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Firminópolis?
No. With soft water a softener adds nothing.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Saneamento De Goias Sa), CC BY-ND 3.0 (2025). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Saneamento De Goias Sa), CC BY-ND 3.0 · Outdated figure? Tell us