Water hardness in Nova Olinda
230 mg/L very hard
Tap water in Nova Olinda is very hard: 230 mg/L (13.4 gpg · 12.9 °dH · 23 °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: 84–669 mg/L.
Nova Olinda, in Ceará, is supplied by Companhia de Água e Esgoto do Ceará. The 2026 Ministry of Health monitoring data give a median of 229.9 mg/L as CaCO₃, which is very hard. Samples vary a great deal, from 83.5 to 668.7 mg/L, so a test at your own tap is worthwhile before choosing a softener.
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 | 230 mg/L |
|---|---|
| Utility | Companhia De Agua E Esgoto Do Ceara |
How Nova Olinda compares
- Tap water in Nova Olinda is 441 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 19 of 1915 in Brazil (1 = hardest); 99 % of these cities have softer water.
- In Ceará it is number 8 of 47 cities; the regional median is 115 mg/L.
- Nearest city with clearly softer water: Altaneira, 13 km away (153 mg/L).
- Nearest city with clearly harder water: Salitre, 68 km away (365 mg/L).
Ranking of the hardest and softest water in Brazil →
What it means at home
- Severe scale: heater elements and washing-machine heaters fail early.
- Detergent use is very high; taps and screens coat within days.
- Dishwasher at maximum salt setting.
- An ion-exchange softener is practically essential; RO for drinking water.
How much salt will you use for softening?
Yes. At this hardness a softener pays for itself through appliance life and detergent.
Descale a coffee machine or kettle about every 1 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Nova Olinda
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 13 °dH |
| AEG / Electrolux | 3 |
| Beko | 4th |
| Hoover | S2 |
| LG | H2 |
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 Nova Olinda water hard or soft?
It is very hard: 230 mg/L as CaCO₃ (13.4 gpg, 12.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Nova Olinda 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 Nova Olinda water?
13.4 gpg, equal to 12.9 °dH, 23 °fH or 230 mg/L calcium carbonate.
What dishwasher salt setting should I use in Nova Olinda?
For 230 mg/L (12.9 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Nova Olinda?
Yes, unless you are only passing through: scale damages appliances within a few years.
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