Water hardness in Council Bluffs
9.7 gpg hard
Tap water in Council Bluffs is hard: 9.7 gpg (167 mg/L · 9.3 °dH · 16.6 °fH).
Source: Council Bluffs Water Works, Water Quality page - 2025 Water Quality Facts and Figures (Finished Water Chemical Analysis) (2025) · data checked 2026-10-23
Range across supply zones: 160–173 mg/L.
2 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| gpg | mg/L | ||
|---|---|---|---|
| Council Point Purification Plant | 10.1 | 173 | hard |
| Narrows Purification Plant | 9.3 | 160 | hard |
Council Bluffs Water Works serves the city from the Missouri River valley, with 2 supply zones that differ slightly. Water that moves through valley sand and gravel dissolves calcium and magnesium, giving hard water at 166.5 mg/L CaCO₃ (160–173 mg/L). Scale shows up on kettles and shower glass.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 9.7 gpg |
|---|---|
| Utility | Council Bluffs Water Works |
How Council Bluffs compares
- Tap water in Council Bluffs is 7 % harder than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 640 of 1372 in the United States (1 = hardest); 53 % of these cities have softer water.
- In Iowa it is number 1 of 5 cities; the regional median is 8 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 Council Bluffs
| 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 Council Bluffs water hard or soft?
It is hard: 167 mg/L as CaCO₃ (9.7 gpg, 9.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Council Bluffs 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 Council Bluffs water?
9.7 gpg, equal to 9.3 °dH, 16.6 °fH or 167 mg/L calcium carbonate.
What dishwasher salt setting should I use in Council Bluffs?
For 167 mg/L (9.3 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Council Bluffs?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: Council Bluffs Water Works, Water Quality page - 2025 Water Quality Facts and Figures (Finished Water Chemical Analysis) (2025). Method: figure published by the water supplier. Council Bluffs Water Works, Water Quality page - 2025 Water Quality Facts and Figures (Finished Water Chemical Analysis) · Outdated figure? Tell us