Shiloh Water Hardness & Quality Report (2026)
Water Hardness
9.1 grains per gallon
Source
river
pH Level
7.9
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
289.3 mg/L
Est. Daily Cost
$0.41
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 Shiloh, your appliances are currently losing 21% efficiency due to mineral buildup.
| Appliance | In Shiloh | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.5 yrs | 8.5 yrs | -47% |
| Washing Machine | 7.8 yrs | 12 yrs | -35% |
| Water Heater | 9.4 yrs | 15 yrs | -37% |
Regional Water Comparison
How Shiloh compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Shiloh, Illinois | 155.5 mg/L | 5.5 ppt | 🟠 Hard | river |
| O'Fallon, Illinois | 239.5 mg/L | 8.4 ppt | 🔴 Very Hard | river |
| Swansea, Illinois | 234 mg/L | 8.2 ppt | 🔴 Very Hard | river |
| Belleville, Illinois | 111.5 mg/L | 4 ppt | 🟡 Moderately Hard | river |
| Fairview Heights, Illinois | 236 mg/L | 8.2 ppt | 🔴 Very Hard | river |
National Benchmark
How Shiloh compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Shiloh | 155.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Shiloh's Water Unique?
Local geology and source profile
Shiloh, Illinois, in Saint Clair County — a Saint Clair County village adjacent to O'Fallon and Belleville in southwest Illinois — receives its water from the Illinois American Water, drawing from the Mississippi River (Saint Clair County) through the southwest Illinois distribution.
The hard 155.5 mg/L hardness and TDS of 289.3 mg/L reflect the southwest Illinois Saint Clair County Mississippi River supply's hard calcareous character — consistent with the Madison-Saint Clair County southwest Illinois Metro East Mississippi River communities (compare Glen Carbon IL: 146.5 mg/L; Justice IL: 197.5 mg/L). Shiloh's position near Scott Air Force Base may contribute additional groundwater contamination. The Mississippi River at Saint Clair County — Ordovician Gasconade Dolomite (dolomitic — primary hardness contributor), Pennsylvanian calcareous shale (calcareous — secondary contributor), and Quaternary Mississippi alluvium (calcareous — TDS contributor).
At 155.5 mg/L with TDS 289, Shiloh's water is hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 5.5 ppt warrants a certified drinking water filter — Scott Air Force Base (Saint Clair County — AFFF) is a primary contributor to Shiloh's PFAS readings.
Geology & Source: Shiloh in Saint Clair County draws from the Illinois American Water on the Mississippi River (Saint Clair County, southwest Illinois) — the Mississippi River at Saint Clair County drains the Ozark Plateau (Ordovician Gasconade Dolomite — dolomitic) and Pennsylvanian calcareous shale (calcareous) — Illinois Saint Clair County Mississippi River Ordovician-Pennsylvanian calcareous supply produces hard water at 155.5 mg/L with TDS 289.3 mg/L.