Water hardness in Parambu
145 mg/L hard
Tap water in Parambu is hard: 145 mg/L (8.5 gpg · 8.1 °dH · 14.5 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia De Agua E Esgoto Do Ceara), CC BY-ND 3.0 (2025) · data checked 2026-10-20
Range across supply zones: 110–661 mg/L.
Parambu, in Ceará, is supplied by Companhia De Agua E Esgoto Do Ceara. The 2025 reported hardness is 145.1 milligrams per litre as calcium carbonate, which is hard. The sample range is very wide, from 109.7 to 660.8, so individual readings vary a lot.
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 | 145 mg/L |
|---|---|
| Utility | Companhia De Agua E Esgoto Do Ceara |
How Parambu compares
- Tap water in Parambu is 241 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 72 of 1915 in Brazil (1 = hardest); 96 % of these cities have softer water.
- In Ceará it is number 14 of 47 cities; the regional median is 115 mg/L.
- Nearest city with clearly softer water: Quiterianópolis, 47 km away (104 mg/L).
- Nearest city with clearly harder water: Novo Oriente, 76 km away (207 mg/L).
Ranking of the hardest and softest water in Brazil →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Parambu
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 8 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S1 |
| 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 Parambu water hard or soft?
It is hard: 145 mg/L as CaCO₃ (8.5 gpg, 8.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Parambu 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 Parambu water?
8.5 gpg, equal to 8.1 °dH, 14.5 °fH or 145 mg/L calcium carbonate.
What dishwasher salt setting should I use in Parambu?
For 145 mg/L (8.1 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Parambu?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia De Agua E Esgoto Do Ceara), CC BY-ND 3.0 (2025). 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