Water hardness in Marituba
195 mg/L very hard
Tap water in Marituba is very hard: 195 mg/L (11.4 gpg · 10.9 °dH · 19.5 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia De Saneamento Do Para), CC BY-ND 3.0 (2025) · data checked 2026-10-20
Range across supply zones: 152–210 mg/L.
Marituba is supplied from the Utinga system of the Bolonha and Água Preta lakes in the Belém area, which surface water alone cannot cover, so groundwater is used to supplement it. Records for 2025 give a median of 195.0 mg/L CaCO₃, with individual results from 152.0 to 210.0 mg/L. Heavy scale will form on kettles, heaters and appliances, and a softener is worth considering.
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 | 195 mg/L |
|---|---|
| Utility | Companhia De Saneamento Do Para |
How Marituba compares
- Tap water in Marituba is 359 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 33 of 1915 in Brazil (1 = hardest); 98 % of these cities have softer water.
- In Pará it is number 1 of 7 cities; the regional median is 149 mg/L.
- Nearest city with clearly softer water: Ananindeua, 8 km away (153 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 Marituba
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 11 °dH |
| AEG / Electrolux | 3 |
| Beko | 3rd |
| 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 Marituba water hard or soft?
It is very hard: 195 mg/L as CaCO₃ (11.4 gpg, 10.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Marituba 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 Marituba water?
11.4 gpg, equal to 10.9 °dH, 19.5 °fH or 195 mg/L calcium carbonate.
What dishwasher salt setting should I use in Marituba?
For 195 mg/L (10.9 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Marituba?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia De Saneamento Do Para), CC BY-ND 3.0 (2025). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Companhia De Saneamento Do Para), CC BY-ND 3.0 · Outdated figure? Tell us