Effingham Water Hardness & Quality Report (2026)
Water Hardness
12.1 grains per gallon
Source
river
pH Level
8.3
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
454.3 mg/L
Est. Daily Cost
$0.55
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 Effingham, your appliances are currently losing 28% efficiency due to mineral buildup.
| Appliance | In Effingham | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.8 yrs | 8.5 yrs | -67% |
| Washing Machine | 5.9 yrs | 12 yrs | -51% |
| Water Heater | 7.3 yrs | 15 yrs | -51% |
Regional Water Comparison
How Effingham compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Effingham, Illinois | 207 mg/L | 7.3 ppt | 🔴 Very Hard | river |
| Mattoon, Illinois | 109 mg/L | 3.9 ppt | 🟡 Moderately Hard | river |
| Charleston, Illinois | 244.5 mg/L | 8.5 ppt | 🔴 Very Hard | river |
| Decatur, Illinois | 147 mg/L | 5.2 ppt | 🟠 Hard | river |
| Centralia, Illinois | 238.5 mg/L | 8.3 ppt | 🔴 Very Hard | river |
National Benchmark
How Effingham compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Effingham | 207 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Effingham's Water Unique?
Local geology and source profile
Effingham, Illinois, in Effingham County — the Effingham County seat adjacent to Vandalia and Mattoon on the Kaskaskia River in central Illinois — receives its water from the City of Effingham Water, drawing from the Kaskaskia River (Effingham County) through the central Illinois distribution.
The hard 207 mg/L hardness and TDS of 454.3 mg/L reflect the central Illinois Effingham County Kaskaskia River supply's hard calcareous character — the Mississippian Salem Limestone and Pennsylvanian Carbondale Formation produce hard calcareous water typical of the Kaskaskia River corridor communities in central Illinois (compare Centralia IL: 238.5/572 harder in Marion County downstream; Herrin IL: 223.5/515 in Williamson County; Effingham comparable on the upper Kaskaskia calcareous draw). The Kaskaskia River at Effingham County — Mississippian Salem Limestone (calcareous — primary hardness contributor), Pennsylvanian Carbondale Formation (calcareous — secondary contributor), and Quaternary Kaskaskia alluvium (calcareous — TDS contributor).
At 207 mg/L with TDS 454, Effingham's water is hard. A water softener is recommended to prevent scale buildup. A reverse osmosis system is advisable for drinking water. The PFAS level of 7.3 ppt warrants a certified drinking water filter — the Effingham County central Illinois industrial corridor contribute to Effingham's elevated readings.
Geology & Source: Effingham in Effingham County draws from the City of Effingham Water on the Kaskaskia River (Effingham County, central Illinois) — the Kaskaskia River at Effingham County drains the Illinois Interior Plains (Mississippian Salem Limestone — calcareous) and Pennsylvanian Carbondale Formation (calcareous) — Illinois Effingham County Kaskaskia River Mississippian-Pennsylvanian calcareous supply produces hard water at 207 mg/L with TDS 454.3 mg/L.