Water hardness in Igrejinha
144 mg/L hard
Tap water in Igrejinha is hard: 144 mg/L (8.4 gpg · 8.1 °dH · 14.4 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia Riograndense De Saneamento), CC BY-ND 3.0 (2026) · data checked 2026-10-20
Range across supply zones: 117–210 mg/L.
Igrejinha, in Rio Grande do Sul, gets its water from Companhia Riograndense De Saneamento. The 2026 Ministério da Saúde data report 144.0 milligrams per litre as calcium carbonate, which is hard, with samples between 116.9 and 209.8.
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 | 144 mg/L |
|---|---|
| Utility | Companhia Riograndense De Saneamento |
How Igrejinha compares
- Tap water in Igrejinha is 239 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 74 of 1915 in Brazil (1 = hardest); 96 % of these cities have softer water.
- In Rio Grande do Sul it is number 8 of 244 cities; the regional median is 60 mg/L.
- Nearest city with clearly softer water: Taquara, 11 km away (38 mg/L).
- Nearest city with clearly harder water: Marques de Souza, 138 km away (205 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 Igrejinha
| 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 Igrejinha water hard or soft?
It is hard: 144 mg/L as CaCO₃ (8.4 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 Igrejinha 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 Igrejinha water?
8.4 gpg, equal to 8.1 °dH, 14.4 °fH or 144 mg/L calcium carbonate.
What dishwasher salt setting should I use in Igrejinha?
For 144 mg/L (8.1 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Igrejinha?
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 Riograndense De Saneamento), CC BY-ND 3.0 (2026). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Companhia Riograndense De Saneamento), CC BY-ND 3.0 · Outdated figure? Tell us