Lenexa Water Hardness & Quality Report (2026)
Water Hardness
22.4 grains per gallon
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
1198.6 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 Lenexa, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Lenexa | 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 Lenexa compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Lenexa, Kansas | 383 mg/L | 5.2 ppt | 🔴 Very Hard | groundwater |
| Overland Park, Kansas | 374.5 mg/L | 5.1 ppt | 🔴 Very Hard | groundwater |
| Shawnee, Kansas | 347.5 mg/L | 4.8 ppt | 🔴 Very Hard | groundwater |
| Prairie Village, Kansas | 146 mg/L | 2.5 ppt | 🟠 Hard | groundwater |
| Olathe, Kansas | 340.5 mg/L | 4.7 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Lenexa compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Lenexa | 383 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Lenexa home
Shop water softeners on Amazon.com →
What Makes Lenexa's Water Unique?
Local geology and source profile
Lenexa, Kansas, in Johnson County in the Kansas City metro area — a major corporate and logistics hub (home of Garmin, Black & Veatch, and multiple Fortune 500 distribution centers), one of the fastest-growing cities in Kansas, and an affluent Johnson County suburb adjacent to Olathe and Overland Park — draws its municipal water supply from the Kansas River (Kaw River) via the Johnson County Water District No. 1 and the Kansas City, Kansas Board of Public Utilities (BPU). Water hardness in Lenexa measures 383 mg/L — classified as extremely hard.
Lenexa's extremely hard supply reflects the Kansas River's highly calcareous Kansas watershed. The Kansas River at the Kaw–Missouri River confluence area drains: the Kansas Permian calcareous platform (Permian Chase Group limestone and Nolans Limestone — the highly soluble Permian calcareous limestone of the Flint Hills–Salina Basin, dissolving readily in the Smoky Hill and Republican River tributaries); the Pennsylvanian Kansas City Group calcareous cyclothems (the Iatan, Plattsburg, and Stanton Limestone formations of the Kansas City limestone group — calcareous marine limestone); and the Nebraska–Kansas calcareous loess recharge (highly calcareous loess contributing dissolved calcium to the Kansas River watershed groundwater). The concentrated calcareous Permian and Pennsylvanian Kansas terrain produces the extremely hard 383 mg/L at Lenexa.
At 383 mg/L, Lenexa residents face severe hard water challenges. Scale deposits form very rapidly on all fixtures and appliances — weekly descaling and appliance protection measures are strongly recommended. Johnson County Water District No. 1 consistently delivers water meeting all Kansas KDH&E and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Kansas River (Kaw River) and Missouri River via the Kansas City, Kansas Board of Public Utilities (BPU) and the Johnson County Water District No. 1 — the Johnson County Kaw River Valley draining the Kansas Permian calcareous platform and Kansas City Pennsylvanian limestone at the Kaw–Missouri River confluence; extremely hard supply at 383 mg/L in Johnson County.