Water Hardness in Oneida, WI
Wisconsin · 1 zip codes · 10 matched water systems
City avg (weighted): 146 PPM
Dataset updated March 9, 202610 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology
Is Oneida, WI Water Hard or Soft?
The displayed hardness for Oneida, WI is 140 PPM (8.2 GPG) from Green Bay Waterworks, classified as moderately hard. The citywide weighted average is 146 PPM.
Water hardness is not a drinking-water safety score. It measures calcium and magnesium minerals, and address-level results can shift by pressure zone, supply blend, building plumbing, or private well.
How this city reading is built
This city reading is a weighted rollup across 10 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.
Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.
Water Systems in Oneida
These systems are matched to Oneida, WI. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
| Green Bay Waterworks WI4050356 | surface water | 140 PPM Moderately HardUSGS estimate: 244 PPM | |
| De Pere Waterworks Sa 1 WI4050453 | surface water | 140 PPM Moderately HardUSGS estimate: 187 PPM | |
| Howard Waterworks WI4050468 | surface water | 140 PPM Moderately HardUSGS estimate: 187 PPM | |
| Ashwaubenon Waterworks WI4050456 | surface water | 140 PPM Moderately HardUSGS estimate: 187 PPM | |
| Bellevue Waterworks WI4050459 | surface water | 140 PPM Moderately HardUSGS estimate: 187 PPM |
Zip Codes in Oneida, WI
What This Means For You
Use this city reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
Know your water hardness?
If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Oneida, WI.
Frequently Asked Questions
How hard is the water in Oneida, WI?
The citywide weighted average water hardness in Oneida, WI is 146 PPM (8.5 GPG), classified as moderately hard. This is based on 10 matched water systems. The gauge highlights Green Bay Waterworks, a verified treated-water system, because individual systems can differ from the citywide average.
Do I need a water softener in Oneida, WI?
With a citywide average hardness of 146 PPM, a water softener is worth considering for homes in Oneida. Confirm your tap reading before sizing equipment.
Is hard water in Oneida, WI safe to drink?
Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.
How many water systems serve Oneida, WI?
Oneida, Wisconsin is served by 10 matched water systems across 1 zip code.
Learn More About Your Water
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