Water hardness in Cadillac
9.8 gpg hard
Tap water in Cadillac is hard: 9.8 gpg (167 mg/L · 9.4 °dH · 16.7 °fH).
Source: City of Cadillac Water Quality Report (CCR) 2023 (2023) · data checked 2026-11-03
Range across supply zones: 137–167 mg/L.
Cadillac draws groundwater from city wells rather than from Lake Cadillac, which the city used before its well fields were built. The 2023 report lists hardness at 167 mg/L (9.8 gpg), which is hard. Calcium and iron dissolve from the aquifer, and the city adds phosphates to keep them in solution. That helps with pipe corrosion but does not soften the water, so scale on kettles and fixtures is likely.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 9.8 gpg |
|---|---|
| Utility | City of Cadillac Water |
How Cadillac compares
- Tap water in Cadillac is 8 % harder than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 638 of 1372 in the United States (1 = hardest); 53 % of these cities have softer water.
- In Michigan it is number 1 of 28 cities; the regional median is 6.2 gpg.
Ranking of the hardest and softest water in the United States →
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 Cadillac
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 9 °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 Cadillac water hard or soft?
It is hard: 167 mg/L as CaCO₃ (9.8 gpg, 9.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Cadillac 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 Cadillac water?
9.8 gpg, equal to 9.4 °dH, 16.7 °fH or 167 mg/L calcium carbonate.
What dishwasher salt setting should I use in Cadillac?
For 167 mg/L (9.4 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Cadillac?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: City of Cadillac Water Quality Report (CCR) 2023 (2023). Method: figure published by the water supplier. City of Cadillac Water Quality Report (CCR) 2023 · Outdated figure? Tell us