Antioch Water Hardness & Quality Report (2026)
Water Hardness
14.6 grains per gallon
Source
river
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
616.3 mg/L
Est. Daily Cost
$0.67
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 Antioch, your appliances are currently losing 33% efficiency due to mineral buildup.
| Appliance | In Antioch | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 4.4 yrs | 12 yrs | -63% |
| Water Heater | 5.6 yrs | 15 yrs | -63% |
Regional Water Comparison
How Antioch compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Antioch, Illinois | 249.5 mg/L | 8.7 ppt | 🔴 Very Hard | river |
| Lindenhurst, Illinois | 146 mg/L | 5.2 ppt | 🟠 Hard | river |
| Round Lake Beach, Illinois | 180.5 mg/L | 6.4 ppt | 🔴 Very Hard | river |
| Round Lake, Illinois | 180.5 mg/L | 6.4 ppt | 🔴 Very Hard | river |
| Grayslake, Illinois | 118 mg/L | 4.3 ppt | 🟡 Moderately Hard | river |
National Benchmark
How Antioch compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Antioch | 249.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Antioch's Water Unique?
Local geology and source profile
Antioch, Illinois, in Lake County — a Lake County village adjacent to Gurnee and Lake Villa on the Chain O'Lakes in northeast Illinois near the Wisconsin border — receives its water from the Antioch Water Division, drawing from the Chain O'Lakes and Fox River (Lake County) through the northeast Illinois distribution.
The extremely hard 249.5 mg/L hardness and TDS of 616.3 mg/L reflect the northeast Illinois Fox River supply's very hard Silurian-Ordovician dolomitic character — much harder than the Lake Michigan Lake County communities (Lindenhurst: 146 mg/L), driven by the Fox River's drainage through the deep Silurian Niagara Dolomite and Ordovician Galena Dolomite bedrock of northeast Illinois. The Fox River-Chain O'Lakes watershed at Lake County drains — Silurian Niagara Dolomite (dolomitic — primary hardness contributor), Ordovician Galena Dolomite (dolomitic — secondary contributor), Ordovician Maquoketa Shale (slightly calcareous), and Quaternary calcareous glacial till.
At 249.5 mg/L with TDS 616, Antioch's water is extremely hard. A water softener is strongly recommended to prevent rapid scale buildup. The PFAS level of 8.7 ppt warrants a certified reverse osmosis drinking water filter — Great Lakes Naval Training Center (Lake County — AFFF) and the northeast Illinois Lake County military corridor contribute to Antioch's elevated readings.
Geology & Source: Antioch in Lake County draws from the Antioch Water Division on the Chain O'Lakes and Fox River system (Lake County, northeast Illinois) — the Fox River at Lake County drains the Wisconsin Till Plains (Silurian Niagara Dolomite — dolomitic, Ordovician Galena Dolomite — dolomitic) via glacial till — Illinois Lake County Fox River-Chain O'Lakes dolomitic watershed produces extremely hard water at 249.5 mg/L with TDS 616.3 mg/L.