Bourbonnais Water Hardness & Quality Report (2026)
Water Hardness
180+ mg/L
Very Hardestimated · not lab-verified
Source
river
pH Level
8.3
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
444 mg/L
Est. Daily Cost
$0.91
energy & soap waste
Source: See methodology section below · 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 Bourbonnais, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Bourbonnais | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 6.6 yrs | 12 yrs | -45% |
| Water Heater | 8.3 yrs | 15 yrs | -45% |
Regional Water Comparison
How Bourbonnais compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Bourbonnais, Illinois | ≈ 180+ mg/L | 7.2 ppt | 🔴 Very Hard | river |
| Bradley, Illinois | ≈ 120–179 mg/L | 7.3 ppt | 🟠 Hard | river |
| Kankakee, Illinois | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | river |
| Frankfort, Illinois | ≈ 180+ mg/L | 0 ppt | 🔴 Very Hard | groundwater |
| New Lenox, Illinois | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | river |
National Benchmark
How Bourbonnais compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Bourbonnais | ≈ 180+ mg/L | 🔴 High |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Bourbonnais's Water Unique?
Local geology and source profile
Aqua Illinois-Kankakee Division provides water services to Bourbonnais in Kankakee County, Illinois, serving approximately 80,275 people. The primary source is the Kankakee River, a surface water supply treated at the Kankakee Division facility (PWSID IL0915030), operating from 1000 S. Schuyler Ave, Kankakee. No specific treatment plant names beyond the division are detailed in available reports. The Kankakee River watershed spans parts of Indiana and Illinois, draining agricultural lands and urban areas before reaching the treatment intake. Conventional surface water treatment includes coagulation, sedimentation, filtration, and disinfection; the 2017 Consumer Confidence Report confirms compliance with federal standards.
The Kankakee River watershed is underlain by Pleistocene glacial deposits overlying Paleozoic carbonate rock formations, including Silurian dolomite and Devonian limestone. These carbonate-rich formations dissolve over time, releasing calcium and magnesium ions into the surface water as it courses through limestone-influenced terrain. Glacial sediment interactions further elevate mineral leaching, imparting a hard character to the supply. This mineralised profile is typical of central-northern Illinois river systems influenced by limestone bedrock exposure and outwash plain geology.
Very hard water causes significant scale buildup in pipes, water heaters, dishwashers, washing machines, and coffee makers, reducing efficiency and lifespan. Regular deliming, using scale inhibitors, and flushing heating systems is advised. A water softener is strongly recommended for households to mitigate soap inefficiency, spotting on dishes, and appliance wear. Recent data indicates 2 contaminants above EPA health guidelines (MCLGs) though within legal limits, with no MCL violations reported; residents should contact Aqua Illinois for the latest CCR.
Geology & Source: Kankakee River watershed, northeastern Illinois; Pleistocene glacial till over Silurian dolomite and Devonian limestone — carbonate dissolution releases calcium and magnesium, producing hard surface water
Other Illinois Water Reports
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Frequently Asked Questions
Is Bourbonnais's water safe to drink?
Do I need a water softener in Bourbonnais?
How does Bourbonnais compare to the USA average?
Data Sources & Methodology
Water quality data for Bourbonnais is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.