About CheckMyTap
CheckMyTap is an independent water quality resource for US homeowners. We compile data from federal and state agencies to help you understand what is in your water and make informed decisions about treatment.
Our Data Sources
Water quality data on this site comes from publicly available government and nonprofit databases: the EPA Safe Drinking Water Information System (SDWIS), the Environmental Working Group (EWG) Tap Water Database, USGS water hardness surveys, and individual municipal Consumer Confidence Reports (CCRs). We cross-reference multiple sources to provide the most accurate picture possible.
How We Make Recommendations
Our recommendations are based on water chemistry, not product commissions. If your water data shows you do not need a softener, we say so. If a less expensive system category solves your problem, we recommend that category. We explain the science and let you make the final decision. See our affiliate disclosure for full details on how we earn revenue.
Limitations
City-level averages may not reflect your specific tap water. Hardness and contaminant levels can vary by neighborhood, season, and building plumbing age. For the most accurate data for your address, we recommend independent home water testing or requesting your utility's most recent CCR.