Dyer Water Hardness & Quality Report (2026)
Water Hardness
15.7 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
699.7 mg/L
Est. Daily Cost
$0.71
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 Dyer, your appliances are currently losing 36% efficiency due to mineral buildup.
| Appliance | In Dyer | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3.7 yrs | 12 yrs | -69% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Dyer compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Dyer, Indiana | 268 mg/L | 8.7 ppt | 🔴 Very Hard | river |
| Saint John, Indiana | 158.5 mg/L | 4.7 ppt | 🟠 Hard | river |
| Schererville, Indiana | 181.5 mg/L | 5.6 ppt | 🔴 Very Hard | river |
| Munster, Indiana | 208 mg/L | 6.5 ppt | 🔴 Very Hard | river |
| Lansing, Illinois | 282.5 mg/L | 9.8 ppt | 🔴 Very Hard | river |
National Benchmark
How Dyer compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Dyer | 268 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Dyer's Water Unique?
Local geology and source profile
Dyer, Indiana, in Lake County — a Lake County town adjacent to Schererville and Lowell in the south Chicago suburban corridor of northwest Indiana — receives its municipal water from Indiana American Water, drawing from the Kankakee River (Lake County) or the northwest Indiana municipal groundwater system through the south Chicago distribution area.
The very hard 268 mg/L hardness and high TDS of 699.7 mg/L reflect the northwest Indiana Kankakee River supply's intense calcareous character — among the hardest surface water supplies in the Midwest. The Kankakee River at Lake County drains the Indiana-Illinois Till Plain — Silurian Niagara Dolomite (very high purity dolomite — the dominant Indiana carbonate platform), Devonian Geneva Dolomite (calcareous), and calcareous Pleistocene Lake Michigan Lobe till (glacially ground dolomite and limestone — very calcareous). The near-pure Niagara and Geneva dolomite bedrock beneath the Lake Michigan Lobe till produces the very hard northwest Indiana supply.
At 268 mg/L with TDS 700, Dyer's water is very hard. A water softener is strongly recommended. Scale builds rapidly on all surfaces, appliance lifespans are significantly shortened, and water heaters require annual descaling without softening. The PFAS level of 8.7 ppt warrants a certified reverse osmosis drinking water filter — Glenview Naval Air Station (Cook County — AFFF, migrating into northwest Indiana) and the Chicago metro PFAS complex contribute to Dyer's elevated readings.
Geology & Source: Dyer in Lake County draws from Indiana American Water on the Kankakee River (Lake County, northwest Indiana) — the Kankakee drains the Indiana-Illinois Till Plain (Silurian Niagara Dolomite, Devonian Geneva Dolomite, calcareous Pleistocene Lake Michigan Lobe till) — Indiana Lake County Kankakee River Silurian-Devonian carbonate watershed produces very hard water at 268 mg/L with TDS 699.7 mg/L in this Lake County Indiana city.