Hannibal Water Hardness & Quality Report (2026)
Water Hardness
9.2 grains per gallon
Source
river
pH Level
7.9
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
304.7 mg/L
Est. Daily Cost
$0.42
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 Hannibal, your appliances are currently losing 21% efficiency due to mineral buildup.
| Appliance | In Hannibal | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.4 yrs | 8.5 yrs | -48% |
| Washing Machine | 7.8 yrs | 12 yrs | -35% |
| Water Heater | 9.3 yrs | 15 yrs | -38% |
Regional Water Comparison
How Hannibal compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Hannibal, Missouri | 157 mg/L | 5.1 ppt | 🟠 Hard | river |
| Quincy, Illinois | 182 mg/L | 6.4 ppt | 🔴 Very Hard | river |
| Macomb, Illinois | 203.5 mg/L | 7.1 ppt | 🔴 Very Hard | river |
| Wentzville, Missouri | 267.5 mg/L | 8 ppt | 🔴 Very Hard | river |
| Fulton, Missouri | 210.5 mg/L | 6.5 ppt | 🔴 Very Hard | river |
National Benchmark
How Hannibal compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Hannibal | 157 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Hannibal's Water Unique?
Local geology and source profile
Hannibal, Missouri, in Marion County — the Marion County seat adjacent to Palmyra on the Mississippi River in northeast Missouri, the birthplace of Mark Twain — receives its municipal water from the Hannibal Board of Public Works, drawing from the Mississippi River at the Hannibal intake (Marion County) through the Hannibal treatment plant.
The moderately hard 157 mg/L hardness and TDS of 304.7 mg/L reflect the upper Mississippi River supply's Midwest carbonate drainage character — similar to other upper Mississippi corridor cities (Quincy IL: 160 mg/L; Burlington IA: 145 mg/L). The Mississippi River at Hannibal receives drainage from the Upper Midwest — Ordovician Galena Dolomite and Platteville Limestone (calcareous — major hardness contributors from Iowa-Illinois drainage), Silurian Niagara Dolomite carbonate, and the northeast Missouri Salem Plateau (Ordovician Jefferson City Dolomite).
At 157 mg/L, Hannibal's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and bathroom fixtures develop calcium deposits. Quarterly descaling is appropriate. The PFAS level of 5.1 ppt warrants a certified drinking water filter — the Illinois-Missouri upper Mississippi industrial corridor, agricultural PFAS runoff in the upper Mississippi Basin, and the northeast Missouri PFAS background contribute to Hannibal's readings.
Geology & Source: Hannibal in Marion County draws from the Hannibal Board of Public Works on the Mississippi River (Marion County, northeast Missouri) — the Mississippi at Hannibal drains the Upper Midwest (Ordovician dolomite, Silurian carbonate) and the Missouri Ozarks calcareous — Missouri Mississippi River Upper Midwest carbonate drainage produces moderately hard water at 157 mg/L with TDS 304.7 mg/L in this Marion County Missouri city.