Columbia Water Hardness & Quality Report (2026)
Water Hardness
16.5 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.009 mg/L
✓ Below action level
TDS
760.5 mg/L
Est. Daily Cost
$0.75
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 Columbia, your appliances are currently losing 38% efficiency due to mineral buildup.
| Appliance | In Columbia | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3.1 yrs | 12 yrs | -74% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Columbia compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Columbia, Illinois | 283 mg/L | 9.8 ppt | 🔴 Very Hard | river |
| Oakville, Missouri | 100 mg/L | 3.7 ppt | 🟡 Moderately Hard | river |
| Lemay, Missouri | 183.5 mg/L | 5.8 ppt | 🔴 Very Hard | river |
| Waterloo, Illinois | 159.5 mg/L | 5.7 ppt | 🟠 Hard | river |
| Cahokia, Illinois | 194 mg/L | 6.8 ppt | 🔴 Very Hard | river |
National Benchmark
How Columbia compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Columbia | 283 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Columbia home
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What Makes Columbia's Water Unique?
Local geology and source profile
Columbia, Illinois, in Monroe County — a Monroe County city adjacent to Waterloo and Dupo in southwest Illinois near the Missouri state line — receives its water from the City of Columbia Water Department, drawing from the Missouri River alluvium wellfield through the southwest Illinois distribution.
The very hard 283 mg/L hardness and very high TDS of 760.5 mg/L reflect the Monroe County supply's very hard calcareous-evaporitic character — the Mississippian Burlington Limestone and Quaternary Missouri River valley alluvium are calcareous-evaporitic formations in the southwest Illinois bluffs; Columbia's deep alluvial wells along the Missouri River corridor concentrate significantly harder and higher-TDS water than the Kaskaskia River surface supply used by nearby Waterloo (compare Waterloo IL: 159.5/301 in Monroe County comparable; Dupo IL: 278/749 in St. Clair County comparable; Columbia draws from deeper Missouri alluvial wells with higher evaporitic concentration). The Missouri River alluvium wellfield — Mississippian Burlington Limestone (calcareous — secondary contributor), Quaternary Missouri River valley alluvium (calcareous evaporitic — primary hardness contributor), and Holocene Missouri River deltaic deposit (evaporitic — TDS contributor).
At 283 mg/L with TDS 761, Columbia's water is very hard — a water softener is strongly recommended to protect plumbing and appliances. The PFAS level of 9.8 ppt warrants a certified drinking water filter. Review the City of Columbia's annual water quality report.
Geology & Source: Columbia in Monroe County draws from the Columbia Water on the Missouri River alluvium wells (Monroe County, southwest Illinois) — the southwest Illinois limestone plain at Monroe County draws from Mississippian Burlington Limestone (calcareous) and Quaternary Missouri River valley alluvium (calcareous evaporitic) — Illinois Monroe County Missouri alluvium well Mississippian calcareous supply produces very hard water at 283 mg/L with TDS 760.5 mg/L.