Northlake Water Hardness & Quality Report (2026)
Water Hardness
14.8 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
635.3 mg/L
Est. Daily Cost
$0.68
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 Northlake, your appliances are currently losing 34% efficiency due to mineral buildup.
| Appliance | In Northlake | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 4.2 yrs | 12 yrs | -65% |
| Water Heater | 5.4 yrs | 15 yrs | -64% |
Regional Water Comparison
How Northlake compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Northlake, Illinois | 254 mg/L | 8.8 ppt | 🔴 Very Hard | river |
| Franklin Park, Illinois | 203 mg/L | 7.1 ppt | 🔴 Very Hard | river |
| Bellwood, Illinois | 139 mg/L | 5 ppt | 🟠 Hard | river |
| Melrose Park, Illinois | 279 mg/L | 9.7 ppt | 🔴 Very Hard | river |
| Elmhurst, Illinois | 240.5 mg/L | 8.4 ppt | 🔴 Very Hard | river |
National Benchmark
How Northlake compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Northlake | 254 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Northlake home
Shop water softeners on Amazon.com →
What Makes Northlake's Water Unique?
Local geology and source profile
Northlake, Illinois, in Cook County — a Cook County village adjacent to Melrose Park and Stone Park in the west Chicago suburb — receives its water from the Illinois American Water, drawing from Lake Michigan (Cook County) through the west Chicago distribution.
The very hard 254 mg/L hardness and TDS of 635.3 mg/L reflect the Cook County Lake Michigan supply's very hard dolomitic character — harder than the north Shore communities (Winnetka IL: 246/602) and Illinois American Water blend (Palos Heights IL: 152/280) because Northlake's west Chicago Illinois American Water draw contacts the Silurian Niagaran Dolomite more directly in the west Cook County distribution zone. The Lake Michigan at Cook County — Silurian Niagaran Dolomite (highly dolomitic — primary hardness contributor), Devonian carbonate shelf (calcareous — secondary contributor), and Quaternary Great Lakes glacial drift (calcareous — TDS contributor).
At 254 mg/L with TDS 635, Northlake's water is very hard. A water softener is strongly recommended to prevent rapid scale buildup. A reverse osmosis system is advisable for drinking water. The PFAS level of 8.8 ppt warrants a certified drinking water filter — the Cook County west Chicago industrial corridor contribute to Northlake's elevated readings.
Geology & Source: Northlake in Cook County draws from the Illinois American Water on Lake Michigan (Cook County, west Chicago suburb, Illinois) — Lake Michigan at Cook County is developed in Silurian Niagaran Dolomite (highly dolomitic) and Devonian carbonate shelf (calcareous) — Illinois Cook County Lake Michigan Silurian-Devonian dolomitic west Chicago supply produces very hard water at 254 mg/L with TDS 635.3 mg/L.