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Your water source matters. Whether your city gets water from rivers and lakes or from underground aquifers affects what contaminants you might find and how the water is treated. Learn about different water sources and browse cities by their source type.
Water sourced from rivers, lakes, and reservoirs
Water sourced from underground aquifers accessed via wells
Water from combination of surface and groundwater sources
Click any city to see their water source type and detailed quality report
The right water filter depends on both your water source and the specific contaminants detected: