Jefferson City Water Hardness & Quality Report (2026)
Water Hardness
11 grains per gallon
Source
river
pH Level
8.2
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
400 mg/L
Est. Daily Cost
$0.50
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 Jefferson City, your appliances are currently losing 25% efficiency due to mineral buildup.
| Appliance | In Jefferson City | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.4 yrs | 8.5 yrs | -60% |
| Washing Machine | 6.6 yrs | 12 yrs | -45% |
| Water Heater | 8.1 yrs | 15 yrs | -46% |
Regional Water Comparison
How Jefferson City compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Jefferson City, Missouri | 188.5 mg/L | 6 ppt | 🔴 Very Hard | river |
| Fulton, Missouri | 210.5 mg/L | 6.5 ppt | 🔴 Very Hard | river |
| Columbia, Missouri | 181.5 mg/L | 5.8 ppt | 🔴 Very Hard | river |
| Rolla, Missouri | 269.5 mg/L | 8 ppt | 🔴 Very Hard | river |
| Fort Leonard Wood, Missouri | 202.5 mg/L | 6.3 ppt | 🔴 Very Hard | river |
National Benchmark
How Jefferson City compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Jefferson City | 188.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Jefferson City's Water Unique?
Local geology and source profile
Jefferson City, Missouri, the Missouri state capital and Cole County seat on the Missouri River — one of the smaller US state capitals, a historic Missouri River community, home of the Missouri State Capitol (completed 1917 on a limestone bluff above the Missouri River), Lincoln University (Missouri's historically Black public university, founded 1866 by Black Union Army veterans), and a governmental and small manufacturing community known as a gateway to the Ozark Highlands — draws its municipal water supply from the Missouri River via the City of Jefferson Water Division. Water hardness in Jefferson City measures 188.5 mg/L — classified as hard.
Jefferson City's hard supply reflects the Missouri River's calcareous Ozark and Plains geology. The Missouri River at Jefferson City drains: the Ozark Highlands (the Ordovician and Devonian dolomite and limestone of the Missouri Ozarks — highly calcareous carbonate terrain, major karst formations including the Gasconade Dolomite and Jefferson City Dolomite, both named for the region); the Kansas and Nebraska Great Plains (calcareous loess and Cretaceous chalk formations); and the Rocky Mountain watershed (calcareous sedimentary formations). The City of Jefferson's treatment plant applies treatment to the Missouri River, but the inherently calcareous Missouri basin produces the hard 188.5 mg/L.
At 188.5 mg/L, Jefferson City residents face regular hard water challenges. Scale deposits form on faucet aerators, showerheads, and appliances within weeks — monthly descaling with citric acid solution is standard maintenance. City of Jefferson Water Division consistently delivers water meeting all Missouri DNR and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Missouri River (Jefferson City Water Treatment Plant) via the City of Jefferson Water Division — the Cole County central Missouri Missouri River Valley (Ordovician–Devonian dolomite and limestone of the Missouri Ozark fringe and Missouri River calcareous alluvium); hard supply at 188.5 mg/L in Cole County.