Yorkville vs Oak Park South Water Quality
Side-by-side water quality comparison for two Illinois cities.
If you are comparing Yorkville and Oak Park South water quality - whether moving, choosing between the two, or curious about a relative's water - here is what the data shows.
Hardness comparison
Yorkville has dramatically harder water at 380 PPM versus Oak Park South at 140 PPM, a difference of 240 PPM. At 380 PPM, Yorkville residents should budget for a water softener ($600-$1,500 installed). Without one, expect scale buildup on fixtures, reduced water heater efficiency, and $800-$1,200/year in hidden costs. Oak Park South also has hard water but to a lesser degree.
Both cities have hard water, but Yorkville's higher hardness means more aggressive scale buildup and higher household impact.
Water sources and why they differ
Water sources differ: Yorkville draws from Deep wells (limestone), while Oak Park South uses Lake Michigan. Both use similar source types, but local geology creates the hardness variation.
What this means for you
If you are moving from Oak Park South to Yorkville, you will notice the water difference. Budget for a water softener and expect to use more soap and detergent until you install one.
Not sure what your specific situation needs? Take the quiz to get a recommendation based on your water data, budget, and household size.
| Metric | Yorkville | Oak Park South |
|---|---|---|
| Hardness | 380 PPM | 140 PPM |
| GPG | 22.2 | 8.2 |
| TDS | 570 PPM | 235 PPM |
| PFAS | 0 ppt | 0 ppt |
| Lead | 1.2 ppb | 5.1 ppb |
| Chlorine | 1.1 mg/L | 1.5 mg/L |
| Level | Extremely Hard | Hard |