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Water Hardness Checker

Is hard water affecting your shower? Enter your ZIP code to discover your area's estimated water hardness.

⚠️ NOTE: Customers with Well Water Customers with private well water cannot be verified using this ZIP code checker. The results are based on regional county-level water data and do not reflect individual private wells. A separate water test is required to determine your well water hardness.

Regional estimates are not direct measurements of your household tap water.

Data source: HardWaterLab public water monitoring dataset .

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