Leawood Water Hardness & Quality Report (2026)
Water Hardness
22.1 grains per gallon
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
1176.1 mg/L
Est. Daily Cost
$1.00
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Leawood, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Leawood | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3 yrs | 12 yrs | -75% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Leawood compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Leawood, Kansas | 378 mg/L | 5.2 ppt | 🔴 Very Hard | groundwater |
| Prairie Village, Kansas | 146 mg/L | 2.5 ppt | 🟠 Hard | groundwater |
| Overland Park, Kansas | 374.5 mg/L | 5.1 ppt | 🔴 Very Hard | groundwater |
| Grandview, Missouri | 289 mg/L | 8.5 ppt | 🔴 Very Hard | river |
| Lenexa, Kansas | 383 mg/L | 5.2 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Leawood compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Leawood | 378 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Leawood's Water Unique?
Local geology and source profile
Leawood, Kansas, in Johnson County — one of the most affluent communities in Kansas (Leawood is consistently ranked among the wealthiest cities in Kansas — an upscale Johnson County suburb adjacent to Overland Park, home of many Kansas City area executives, physicians, attorneys, and financial professionals), home of Town Center Plaza (one of the premier upscale shopping destinations in the Kansas City metropolitan area), adjacent to Overland Park and the Johnson County technology and financial services corridor (the I-435 Johnson County corridor is the wealthiest suburban area in the Kansas City metro, with major corporate campuses and headquarters), and a diverse Johnson County community with a significant Jewish-American professional population — draws its municipal water supply from the Missouri River via the Johnson County Water District No. 1. Water hardness in Leawood measures 378 mg/L — classified as extremely hard.
Leawood's extremely hard supply reflects the northeast Kansas Carboniferous Platform's highly calcareous limestone geology and the Missouri River's extreme mineral load. The Missouri River at Leawood–Johnson County carries the same extreme calcareous load as Leavenworth (376.5 mg/L) — drawing from the Pennsylvanian Kansas City Group limestone, the Permian Chase Group evaporite, and the Rocky Mountains–Great Plains calcareous geology dissolved load. Johnson County Water District No. 1 applies limited softening, producing the extreme 378 mg/L.
At 378 mg/L, Leawood residents face extremely severe hard water challenges. Water softeners are essentially a necessity. Johnson County Water District consistently delivers water meeting all Kansas KDHE and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Missouri River via the Kansas City Water Services Department or Johnson County Water District No. 1 — the Johnson County northeast Kansas Kansas City suburban corridor (Pennsylvanian–Permian calcareous limestone of the Kansas Osage Cuesta Plains — the highly calcareous northeast Kansas Carboniferous carbonate; Missouri River supply with limited softening in the Leawood zone); extremely hard supply at 378 mg/L in Johnson County.