[Solved]-d3.js filter from csv file using multiple columns-d3.js

You can write exactly what you have as a suggestion in your question:

var filteredData = consdata.filter(function(d) 
{ 

        if( d["City"] == "City") || (d["Criticality"]=="High" || d["Criticality"]=="Low")
        { 
            return d;
        } 

    })