Water hardness in Barra de Santo Antônio
20 mg/L soft
Tap water in Barra de Santo Antônio is soft: 20 mg/L (1.2 gpg · 1.1 °dH · 2 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Brk Ambiental Regiao Metropolitana De Maceio Sa), CC BY-ND 3.0 (2025) · data checked 2026-10-20
Range across supply zones: 10–154 mg/L.
Barra de Santo Antônio, in Alagoas, is listed under BRK Ambiental Região Metropolitana de Maceió. The 2025 reported hardness is 20.0 milligrams per litre as calcium carbonate, which is soft. The published range is very wide, from 10.0 to 154.0 milligrams per litre, so the typical figure may not match every sample.
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 | 20 mg/L |
|---|---|
| Utility | Brk Ambiental Regiao Metropolitana De Maceio Sa |
How Barra de Santo Antônio compares
- Tap water in Barra de Santo Antônio is 53 % softer than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 1569 of 1915 in Brazil (1 = hardest); 18 % of these cities have softer water.
- In Alagoas it is number 7 of 10 cities; the regional median is 24 mg/L.
- Nearest city with clearly softer water: Flexeiras, 32 km away (6 mg/L).
- Nearest city with clearly harder water: Maceió, 35 km away (29 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 Barra de Santo Antônio
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 1 °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 Barra de Santo Antônio water hard or soft?
It is soft: 20 mg/L as CaCO₃ (1.2 gpg, 1.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Barra de Santo Antônio 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 Barra de Santo Antônio water?
1.2 gpg, equal to 1.1 °dH, 2 °fH or 20 mg/L calcium carbonate.
What dishwasher salt setting should I use in Barra de Santo Antônio?
For 20 mg/L (1.1 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Barra de Santo Antônio?
No. With soft water a softener adds nothing.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Brk Ambiental Regiao Metropolitana De Maceio Sa), CC BY-ND 3.0 (2025). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Brk Ambiental Regiao Metropolitana De Maceio Sa), CC BY-ND 3.0 · Outdated figure? Tell us