[Solved]-How to hide one series data info in tooltip using highcharts-Highcharts

You were almost there. You needed to check the api for the shared tooltip formatter. Put your check for the series you do not want inside the for each:

...
            tooltip: {
                formatter: function () {
                    var s = '<b>' + this.x + '</b>';
                    $.each(this.points, function () {
                        if (this.series.name != 'Water') {
                            s += '<br/>' + this.series.name + ': ' + this.y + 'm';
                        }                       
                    });
                    return s;
                },
                shared: true,
                valueSuffix: ' cm'

            },
...