Romeoville Water Hardness & Quality Report (2026)
Water Hardness
9.8 grains per gallon
Source
river
pH Level
8
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
327.8 mg/L
Est. Daily Cost
$0.45
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 Romeoville, your appliances are currently losing 22% efficiency due to mineral buildup.
| Appliance | In Romeoville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4 yrs | 8.5 yrs | -53% |
| Washing Machine | 7.4 yrs | 12 yrs | -38% |
| Water Heater | 8.9 yrs | 15 yrs | -41% |
Regional Water Comparison
How Romeoville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Romeoville, Illinois | 168.5 mg/L | 6 ppt | 🟠 Hard | river |
| Bolingbrook, Illinois | 198.5 mg/L | 7 ppt | 🔴 Very Hard | river |
| Lockport, Illinois | 166 mg/L | 5.9 ppt | 🟠 Hard | river |
| Lemont, Illinois | 115 mg/L | 4.2 ppt | 🟡 Moderately Hard | river |
| Crest Hill, Illinois | 104 mg/L | 3.8 ppt | 🟡 Moderately Hard | river |
National Benchmark
How Romeoville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Romeoville | 168.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Romeoville's Water Unique?
Local geology and source profile
Romeoville, Illinois, in Will County — a major Will County Chicago southwest suburban community, a rapidly growing industrial and residential community adjacent to Bolingbrook and Joliet, home of Lewis University (a Lasallian Catholic university), a major logistics and warehousing hub in the Chicago southwest suburban corridor (one of the largest concentrations of distribution centers and warehouses in the Chicago metro area), and a diverse Will County community — draws its municipal water supply from Lake Michigan via Illinois American Water and the Village of Romeoville Water Division. Water hardness in Romeoville measures 168.5 mg/L — classified as hard.
Romeoville's hard supply — harder than many closer-in Chicago suburbs — reflects the Will County Illinois American Water southwest suburban distribution characteristics. While Lake Michigan source water is approximately 130–145 mg/L, the Will County southwest suburban distribution infrastructure (with significant older Joliet-era mains and the longer Illinois American Water southwest distribution network) has accumulated greater mineral content than north side Chicago suburbs. The southwest Will County Illinois American Water distribution zone in the Romeoville area produces the harder 168.5 mg/L.
At 168.5 mg/L, Romeoville residents face moderate-to-hard scale challenges. Monthly descaling with citric acid solution is recommended. Illinois American Water consistently delivers water meeting all Illinois EPA and federal EPA Safe Drinking Water Act requirements.
Geology & Source: Lake supply from Lake Michigan via the Illinois American Water and the Village of Romeoville Water Division — the Will County Chicago southwest suburban corridor (Silurian Niagara Dolomite substrate and Wisconsin Age calcareous Lake Michigan Lobe till; Illinois American Water Lake Michigan supply zone); hard supply at 168.5 mg/L — reflecting the southwest Will County Illinois American Water distribution in the Romeoville zone.