Concord 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
401.5 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 Concord, your appliances are currently losing 25% efficiency due to mineral buildup.
| Appliance | In Concord | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.4 yrs | 8.5 yrs | -60% |
| Washing Machine | 6.6 yrs | 12 yrs | -45% |
| Water Heater | 8 yrs | 15 yrs | -47% |
Regional Water Comparison
How Concord compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Concord, Missouri | 189 mg/L | 6 ppt | 🔴 Very Hard | river |
| Affton, Missouri | 204 mg/L | 6.3 ppt | 🔴 Very Hard | river |
| Mehlville, Missouri | 222 mg/L | 6.8 ppt | 🔴 Very Hard | river |
| Webster Groves, Missouri | 257 mg/L | 7.7 ppt | 🔴 Very Hard | river |
| Oakville, Missouri | 100 mg/L | 3.7 ppt | 🟡 Moderately Hard | river |
National Benchmark
How Concord compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Concord | 189 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Concord's Water Unique?
Local geology and source profile
Concord, Missouri, in Saint Louis County — an unincorporated Saint Louis County community adjacent to Mehlville and Oakville in the south St. Louis metro — receives its municipal water from Missouri American Water, drawing from the Mississippi River at the Midwest Water treatment plant (Saint Louis County) through the Missouri American distribution system.
The hard 189 mg/L hardness and TDS of 401.5 mg/L are consistent with the south Saint Louis County Missouri American Water supply — similar to Lemay (183.5 mg/L) and reflecting the same Mississippi River Ozark carbonate source. The Mississippi River at St. Louis accumulates the combined drainage from the Missouri Ozarks (Ordovician Gasconade Dolomite — very high purity), Mississippian Salem Limestone (calcareous), and the Iowa-Illinois carbonate plain (Silurian Niagara Dolomite), producing the hard St. Louis metro river supply.
At 189 mg/L, Concord's water is hard — scale builds steadily in kettles and appliances, dishwashers benefit from rinse aid, and water heaters should be descaled annually. Monthly descaling is recommended. The PFAS level of 6.0 ppt warrants a certified drinking water filter — the Saint Louis County south metro industrial corridor, the Mississippi River industrial PFAS legacy from upstream manufacturing, and the regional PFAS background contribute to Concord's readings.
Geology & Source: Concord in Saint Louis County draws from Missouri American Water on the Mississippi River (Saint Louis County, southeast Missouri) — the Mississippi at St. Louis drains the Missouri Ozarks (Ordovician Gasconade Dolomite, Mississippian Salem Limestone) and Iowa-Illinois carbonate plain — Missouri Saint Louis County Mississippi River Ozark carbonate watershed produces hard water at 189 mg/L with TDS 401.5 mg/L in this Saint Louis County Missouri community.