Pennsylvania collects and manages public drinking water system information in the Pennsylvania Drinking Water Information System (PADWIS).
The data includes water system inventory information, drinking water sample results for testing required by the regulations and violations of PA Safe Drinking Water Regulations, pertaining to monitoring/reporting requirements, MCL exceedances, and treatment techniques.
Much of this data is searchable via the www.drinkingwater.state.pa.us website. This set contains drinking water sample results reported on behalf of Pennsylvania’s regulated public water supplies.
The data is updated quarterly.