Water hardness in Ivaí
300 mg/L very hard
Tap water in Ivaí is very hard: 300 mg/L (17.5 gpg · 16.8 °dH · 30 °fH).
Source: Ministério da Saúde, SISAGUA – controle semestral (Companhia De Saneamento Do Parana), CC BY-ND 3.0 (2026) · data checked 2026-10-20
Ivaí, in Paraná, is supplied by Companhia de Saneamento do Paraná. The 2026 reported hardness is 300.0 milligrams per litre as calcium carbonate, which is very hard and by far the highest in this group of towns. No range was published, so this is a single reported figure.
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 | 300 mg/L |
|---|---|
| Utility | Companhia De Saneamento Do Parana |
How Ivaí compares
- Tap water in Ivaí is 606 % harder than the median of the 1915 cities we track in Brazil (43 mg/L).
- By hardness it ranks 7 of 1915 in Brazil (1 = hardest); 100 % of these cities have softer water.
- In Paraná it is number 1 of 26 cities; the regional median is 47 mg/L.
- Nearest city with clearly softer water: Jaguariaíva, 141 km away (8 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 Ivaí
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 17 °dH |
| AEG / Electrolux | 4 |
| Beko | 5th |
| Hoover | S3 |
| LG | H3 |
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 Ivaí water hard or soft?
It is very hard: 300 mg/L as CaCO₃ (17.5 gpg, 16.8 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Ivaí 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 Ivaí water?
17.5 gpg, equal to 16.8 °dH, 30 °fH or 300 mg/L calcium carbonate.
What dishwasher salt setting should I use in Ivaí?
For 300 mg/L (16.8 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Ivaí?
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 Parana), CC BY-ND 3.0 (2026). Method: figure published by the water supplier. Ministério da Saúde, SISAGUA – controle semestral (Companhia De Saneamento Do Parana), CC BY-ND 3.0 · Outdated figure? Tell us