This is a rebuild of Drinking Water Watch and not yet the official record. Use the agency’s current Drinking Water Watch for anything you need to rely on.
Violation
From the help published with Drinking Water Watch 3.5, reproduced as delivered.
Violations are issued for a public water system when there is a failure to meet certain state/region or federal drinking water regulations. This includes a failure to collect a sample (called a monitoring violation), failure to report the analytical results from a sample that was collected (a reporting requirement), deliver water that exceeds a maximum contaminant level (a Maximum Contaminant Level violation), as well as other failures. On the Violations page you may view basic water system information, such as Water System No., Water System Name, Principal County Served, Status, Federal and State Type, Source, and Activity Date.