Water hardness in Beloit
19.6 gpg very hard
Tap water in Beloit is very hard: 19.6 gpg (336 mg/L · 18.8 °dH · 33.5 °fH).
Source: Wisconsin DNR Drinking Water System portal (Beloit City Of) (2020) · data checked 2026-10-20
Range across supply zones: 301–389 mg/L.
This figure is over 3 years old; hardness may have changed.
Beloit pumps groundwater from wells in southern Wisconsin's glacial sand and gravel and bedrock aquifers on the Rock River. Carbonate rock in the aquifer gives 335.5 mg/L CaCO₃ (301–389 mg/L), very hard. Heavy scale on heaters; softeners are common. The figure dates from 2020 and may have changed.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 19.6 gpg |
|---|---|
| Utility | Beloit City Of |
How Beloit compares
- Tap water in Beloit is 116 % harder than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 161 of 1372 in the United States (1 = hardest); 88 % of these cities have softer water.
- In Wisconsin it is number 93 of 448 cities; the regional median is 14.3 gpg.
- Nearest city with clearly softer water: Williams Bay, 39 km away (5.1 gpg).
- Nearest city with clearly harder water: Delavan, 34 km away (24.5 gpg).
Ranking of the hardest and softest water in the United States →
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 Beloit
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 19 °dH |
| AEG / Electrolux | 5 |
| 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 Beloit water hard or soft?
It is very hard: 336 mg/L as CaCO₃ (19.6 gpg, 18.8 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Beloit safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
How many grains per gallon is Beloit water?
19.6 gpg, equal to 18.8 °dH, 33.5 °fH or 336 mg/L calcium carbonate.
What dishwasher salt setting should I use in Beloit?
For 336 mg/L (18.8 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Beloit?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Wisconsin DNR Drinking Water System portal (Beloit City Of) (2020). Method: figure published by the water supplier. Wisconsin DNR Drinking Water System portal (Beloit City Of) · Outdated figure? Tell us