Near South Side Water Hardness & Quality Report (2026)
Water Hardness
11.7 grains per gallon
Source
river
pH Level
8.2
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
433.6 mg/L
Est. Daily Cost
$0.54
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 Near South Side, your appliances are currently losing 27% efficiency due to mineral buildup.
| Appliance | In Near South Side | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3 yrs | 8.5 yrs | -65% |
| Washing Machine | 6.2 yrs | 12 yrs | -48% |
| Water Heater | 7.6 yrs | 15 yrs | -49% |
Regional Water Comparison
How Near South Side compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Near South Side, Illinois | 201 mg/L | 7.1 ppt | 🔴 Very Hard | river |
| Douglas, Illinois | 173.5 mg/L | 6.1 ppt | 🟠 Hard | river |
| Chicago, Illinois | 144 mg/L | 3.8 ppt | 🟠 Hard | river |
| Chicago Loop, Illinois | 221 mg/L | 7.7 ppt | 🔴 Very Hard | river |
| Bridgeport, Illinois | 220 mg/L | 7.7 ppt | 🔴 Very Hard | river |
National Benchmark
How Near South Side compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Near South Side | 201 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Near South Side's Water Unique?
Local geology and source profile
Near South Side, Illinois, in Cook County — one of Chicago's most historically significant South Side neighborhoods, encompassing Chinatown, the McCormick Place convention center corridor, Bronzeville's northern edge, and the historic Glessner House Prairie Avenue district — receives its municipal water from the Chicago Department of Water Management (DWM), which draws from Lake Michigan through the South Water Filtration Plant and Jardine Water Purification Plant serving the city's distribution network. Near South Side residents are connected to Chicago's aging cast-iron and ductile iron distribution mains.
The very hard 201 mg/L hardness and TDS of 433.6 mg/L significantly exceed the typical Chicago DWM raw Lake Michigan baseline (~145–165 mg/L), reflecting the substantially higher mineral content that can develop in the aging Near South Side distribution system. Lake Michigan itself receives moderate carbonate inputs from the Silurian Niagara Dolomite and Devonian limestone Great Lakes basin drainage (~130–160 mg/L raw), but the South Side Chicago distribution infrastructure — one of Chicago's oldest, with cast-iron mains dating to the late 19th century in some corridors — accumulates mineral scale deposits that significantly increase hardness and TDS in delivered water compared to the raw Lake Michigan source.
At 201 mg/L, Near South Side residents face very hard water — significantly harder than the Lake Michigan source would suggest. Scale builds rapidly in kettles and coffee machines within weeks, dishwashers require rinse aid or softener treatment, and bathroom fixtures develop heavy calcium deposits. Descaling appliances every four to six weeks is the practical cadence. The PFAS level of 7.1 ppt warrants a certified drinking water filter — Lake Michigan's tributary industrial discharge from the Chicago metropolitan area and northwest Indiana's steel complex, combined with the South Side Chicago industrial-rail corridor, contribute to the DWM's PFAS load.
Geology & Source: Near South Side in Cook County is served by the Chicago Department of Water Management (DWM) drawing from Lake Michigan — Lake Michigan receives carbonate tributary drainage from the Silurian Niagara Dolomite and Devonian limestone Great Lakes platform — Lake Michigan carbonate input and distribution system mineral accumulation in aging Near South Side infrastructure produce very hard water at 201 mg/L with TDS 434 mg/L in this historic Chicago neighborhood.