<table id="table" class="tablesorter">
    <thead>
        <tr>
            <th rowspan="2"><div align="center">Sno</div></th>
            <th rowspan="2"><div align="center">Site Id</div></th>
            <th rowspan="2"><div align="center">Mandal</div></th>
            <th rowspan="2"><div align="center">Piezometer
              Location
          (Village) </div></th>
                <th rowspan="2" ><div align="center">July-18
              15/05/2018 <br>10:00 HRS</div></th>

            <th rowspan="2" ><div align="center">Nov-18</div></th>
            <th rowspan="2" ><div align="center">May-19</div></th>
            <th rowspan="2" ><div align="center">June-19</div></th>
            <th rowspan="2" ><div align="center">July-19
              15/07/2019 <br>10:00 HRS</div></th>
            <th colspan="4" ><div align="center">Rise(+)/Fall(-) from current water level
          and with reference to</div></th>
        </tr>
        <tr>
          <th ><div align="center">July-18</div></th>
          <th ><div align="center">Nov-18</div></th>
          <th ><div align="cesnter">May-19</div></th>
                  <th ><div align="cesnter">Jun-19</div></th>
        </tr>
    </thead>
    <tbody>
      <div align="center">