Water hardness in Aurora
41 mg/L soft
Tap water in Aurora is soft: 41 mg/L (2.4 gpg · 2.3 °dH · 4.1 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia De Agua E Esgoto Do Ceara), CC BY-ND 3.0 (2026) · data checked 2026-10-20
Range across supply zones: 28–59 mg/L.
Aurora, in Ceará, is supplied by Companhia De Agua E Esgoto Do Ceara. The Ministry of Health reports a median hardness of 40.8 mg/L, ranging from 28.4 to 58.9 mg/L (2026 data). This is soft water, so limescale should be limited.
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 | 41 mg/L |
|---|---|
| Utility | Companhia De Agua E Esgoto Do Ceara |
How Aurora compares
- Tap water in Aurora is close to the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 1024 of 1915 in Brazil (1 = hardest); 46 % of these cities have softer water.
- In Ceará it is number 46 of 47 cities; the regional median is 115 mg/L.
- Nearest city with clearly harder water: Barro, 30 km away (100 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 Aurora
| 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 Aurora water hard or soft?
It is soft: 41 mg/L as CaCO₃ (2.4 gpg, 2.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Aurora 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 Aurora water?
2.4 gpg, equal to 2.3 °dH, 4.1 °fH or 41 mg/L calcium carbonate.
What dishwasher salt setting should I use in Aurora?
For 41 mg/L (2.3 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Aurora?
No. With soft water a softener adds nothing.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia De Agua E Esgoto Do Ceara), CC BY-ND 3.0 (2026). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Companhia De Agua E Esgoto Do Ceara), CC BY-ND 3.0 · Outdated figure? Tell us