Water hardness in Maruim
220 mg/L very hard
Tap water in Maruim is very hard: 220 mg/L (12.8 gpg · 12.3 °dH · 22 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Igua Sergipe Sa), CC BY-ND 3.0 (2025) · data checked 2026-10-20
Range across supply zones: 45–395 mg/L.
Maruim, in Sergipe, is served by Igua Sergipe Sa. Reported hardness is 219.8 milligrams per litre as calcium carbonate, which is very hard, and readings are spread widely, from 44.8 to 394.8. The data is from the Ministry of Health's 2025 reporting, so hardness at the tap may differ noticeably over time or between supply points.
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 | 220 mg/L |
|---|---|
| Utility | Igua Sergipe Sa |
How Maruim compares
- Tap water in Maruim is 417 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 22 of 1915 in Brazil (1 = hardest); 99 % of these cities have softer water.
- In Sergipe it is number 3 of 72 cities; the regional median is 44 mg/L.
- Nearest city with clearly softer water: Divina Pastora, 8 km away (88 mg/L).
- Nearest city with clearly harder water: Santo Amaro das Brotas, 18 km away (297 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 Maruim
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 12 °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 Maruim water hard or soft?
It is very hard: 220 mg/L as CaCO₃ (12.8 gpg, 12.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Maruim 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 Maruim water?
12.8 gpg, equal to 12.3 °dH, 22 °fH or 220 mg/L calcium carbonate.
What dishwasher salt setting should I use in Maruim?
For 220 mg/L (12.3 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Maruim?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Ministério da Saúde, SISAGUA – controle semestral (Igua Sergipe Sa), CC BY-ND 3.0 (2025). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Igua Sergipe Sa), CC BY-ND 3.0 · Outdated figure? Tell us