Alpha
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.
Less than Indicator
From the help published with Drinking Water Watch 3.5, reproduced as delivered.
Less than Indicator, if marked with a Y (Yes)
indicates that the result concentration was less than either the Method
Detection Limit (MDL) or the Minimum Reporting Level (MRL) –
and is considered a non-detect.