Tap Water Quality Report for Spearfish, South Dakota
Track your tap water quality with EPA-verified data on contaminants, violations, and health guidelines, updated quarterly from official water system monitoring results.
Spearfish, South Dakota tap water has 80 total contaminants, with 20 being above EPA standards and 50 being above InTheTap suggested standards. There are 0 active violations. The primary water source is not specified, serving 0 residents.
Water Systems (26)
26 water systems serve Spearfish, South Dakota. Select one or more to filter the data below.
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Water Quality Analysis
Comprehensive analysis of your water quality, showing both detected contaminants and violations history. Note that exceeding EPA contaminant levels in a single test doesn't always constitute a violation, as violations typically require sustained exceedances or failure to follow required treatment protocols.
Water Analysis
View detected contaminants and concentration levels for your water system(s).