Water hardness in Kansas City
16.4 gpg very hard
Tap water in Kansas City is very hard: 16.4 gpg (280 mg/L · 15.7 °dH · 28 °fH).
Source: Kansas City Board of Public Utilities (BPU) - 2026 Water Quality Report (2025 data) (2026) · data checked 2026-10-23
The Kansas City Board of Public Utilities draws water from an aquifer in the Missouri River alluvium through two large horizontal collector wells, treated at its Nearman plant. Water filtered through river sand and gravel dissolves calcium and magnesium on the way, which accounts for the very hard 280 mg/L CaCO₃. Scale is heavy on heaters, and a softener is common.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 16.4 gpg |
|---|---|
| Utility | Board of Public Utilities (BPU) Kansas City Kansas |
How Kansas City compares
- Tap water in Kansas City is 81 % harder than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 288 of 1372 in the United States (1 = hardest); 78 % of these cities have softer water.
- In Kansas it is number 3 of 17 cities; the regional median is 8.4 gpg.
- Nearest city with clearly softer water: Merriam, 11 km away (7.9 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 Kansas City
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 16 °dH |
| AEG / Electrolux | 4 |
| Beko | 4th |
| Hoover | S2 |
| 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 Kansas City water hard or soft?
It is very hard: 280 mg/L as CaCO₃ (16.4 gpg, 15.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Kansas City 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 Kansas City water?
16.4 gpg, equal to 15.7 °dH, 28 °fH or 280 mg/L calcium carbonate.
What dishwasher salt setting should I use in Kansas City?
For 280 mg/L (15.7 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Kansas City?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Kansas City Board of Public Utilities (BPU) - 2026 Water Quality Report (2025 data) (2026). Method: figure published by the water supplier. Kansas City Board of Public Utilities (BPU) - 2026 Water Quality Report (2025 data) · Outdated figure? Tell us