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<h4>2020</h4>
Portsmouth Water has no large raw water storage reservoirs.  It relies almost entirely upon groundwater reserves in the chalk aquifers of the South Downs and abstracts its raw water from wells, boreholes and springs.  It has one river abstraction at Gaters Mill on the River Itchen, a chalk river with a groundwater baseflow.

Those reserves rise and fall with the seasons and so Portsmouth Water pays particular attention to the local hydrogeological data by monitoring rainfall at its Havant Offices, groundwater levels in the chalk at Idsworth on the Hampshire/Sussex border, as well as the total yield from the natural springs at Havant and Bedhampton.

These resources are monitored on a daily basis and reported upon on a monthly basis.  The information here is therefore at times one month behind the most current situation.

The information gathered is reproduced here for information purposes; no guarantee is given as to its accuracy.

<em>The information provided in this section shows the Water Supply data for the 12 months from April to March. The monthly data for our resource levels can be found <a href="https://www.portsmouthwater.co.uk/category/water-supply-news/">here</a>.
</em>

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[divider height="30" style="none" line="default" themecolor="1"]

[accordion title="" open1st="0" openAll="0" style=""]

[accordion_item title="Rainfall"]

The weather between April and August of 2019 was significantly drier than the long term average (LTA) with the exception of June. However, the end of September 2019 saw the beginning of an unseasonably wet period. With the exception of January 2020, we saw above average rainfall and February was the wettest on record for England (Met Office records since 1862). Storms Ciara, Dennis and Jorge contributed to exceptionally high rainfall totals for the month across much of the country and causing flooding in several areas. Whilst we were spared the worst of this in the South of England, the high levels of rain resulted in full recharge of our groundwater to levels in excess of 30mAOD; a level not seen since 2016.

The graph below shows recorded rainfall at Havant as a blue bar and the LTA as a red dashed line.

<a href="https://www.portsmouthwater.co.uk/wp-content/uploads/2020/07/rain2020.png"><img class="aligncenter wp-image-10003 size-full" src="https://www.portsmouthwater.co.uk/wp-content/uploads/2020/07/rain2020.png" alt="" width="1006" height="447" /></a>

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[/accordion_item]

[accordion_item title="Groundwater Levels"]

Groundwater levels are a good indicator of the water available to Portsmouth Water from the chalk aquifer from which we abstract the majority of our water for supply. We therefore monitor the levels closely.

Prior to September 2019 there was a run of three slightly drier than average winter recharge seasons which reduced our groundwater levels to within 30cms of passing our first drought trigger; the lowest levels since 2011. The effect of passing this trigger would have been to start proactively working with our customers directly and through the media, asking them to use less water voluntarily.

The rainfall from September onwards resulted in a strong groundwater recovery resulting in a speedy and full recharge of our groundwater supplies. We therefore started 2020/21 in a healthy water resource position.

<a href="https://www.portsmouthwater.co.uk/wp-content/uploads/2020/07/idsworth.png"><img class="aligncenter wp-image-10005 size-full" src="https://www.portsmouthwater.co.uk/wp-content/uploads/2020/07/idsworth.png" alt="" width="1013" height="526" /></a>

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[/accordion_item]

[accordion_item title="Abstraction"]
<p style="vertical-align: baseline; margin: 0cm 0cm 11.25pt 0cm;"><span style="font-size: 10.5pt; font-family: 'Arial',sans-serif; color: #424242;">Annual abstraction is drawn from three types of source: the River Itchen Works which treats surface water, boreholes and wells which abstract groundwater from the underground chalk, and Farlington Water Treatment Works which treats spring water from Havant and Bedhampton.</span></p>
<p style="vertical-align: baseline; margin: 0cm 0cm 11.25pt 0cm;"><span style="font-size: 10.5pt; font-family: 'Arial',sans-serif; color: #424242;">Abstraction from the Company’s sources in 2018/19 was as shown in the table below:</span></p>

<table width="531">
<tbody>
<tr>
<td rowspan="2" width="168">Source</td>
<td colspan="4" width="364">Annual Abstraction - Ml/Yr</td>
</tr>
<tr>
<td width="87">Source Licence</td>
<td width="101">Source Actual 2017/18</td>
<td width="87">Group Licence</td>
<td width="88">Group Actual 2016/17</td>
</tr>
<tr>
<td width="168">Northbrook</td>
<td width="87">7,487</td>
<td width="101">5,031</td>
<td rowspan="2" width="87">7,487</td>
<td rowspan="2" width="88">5,031</td>
</tr>
<tr>
<td width="168">Lower Upham</td>
<td width="87">640</td>
<td width="101">0</td>
</tr>
<tr>
<td width="168">West Street</td>
<td width="87">3,328</td>
<td width="101">556</td>
<td width="87"></td>
<td width="88"></td>
</tr>
<tr>
<td width="168">West Meon</td>
<td width="87">1660</td>
<td width="101">0</td>
<td width="87"></td>
<td width="88"></td>
</tr>
<tr>
<td width="168">River Itchen</td>
<td width="87">15,916</td>
<td width="101">10,702</td>
<td width="87"></td>
<td width="88"></td>
</tr>
<tr>
<td width="168">Maindell</td>
<td width="87">2,040</td>
<td width="101">0</td>
<td width="87"></td>
<td width="88"></td>
</tr>
<tr>
<td width="168">Soberton</td>
<td width="87">3,294</td>
<td width="101">616</td>
<td rowspan="2" width="87">3,294</td>
<td rowspan="2" width="88">619</td>
</tr>
<tr>
<td width="168">Newtown</td>
<td width="87">695</td>
<td width="101">3</td>
</tr>
<tr>
<td width="168">Worlds End</td>
<td width="87">8,296</td>
<td width="101">3,815</td>
<td width="87"></td>
<td width="88"></td>
</tr>
<tr>
<td width="168">Lovedean</td>
<td width="87">4,148</td>
<td width="101">1,583</td>
<td width="87"></td>
<td width="88"></td>
</tr>
<tr>
<td width="168">Havant &amp; Bedhampton</td>
<td width="87">35,770</td>
<td width="101">19,842</td>
<td width="87"></td>
<td width="88"></td>
</tr>
<tr>
<td width="168">Walderton</td>
<td width="87">9,955</td>
<td width="101">6,760</td>
<td rowspan="6" width="87">23,740</td>
<td rowspan="6" width="88">16,806</td>
</tr>
<tr>
<td width="168">Woodmancote</td>
<td width="87">1,103</td>
<td width="101">188</td>
</tr>
<tr>
<td width="168">Fishbourne</td>
<td width="87">3,741</td>
<td width="101">2,669</td>
</tr>
<tr>
<td width="168">Funtington</td>
<td width="87">2,920</td>
<td width="101">1,720</td>
</tr>
<tr>
<td width="168">Lavant</td>
<td rowspan="2" width="87">9,950</td>
<td width="101">4,198</td>
</tr>
<tr>
<td width="168">Brickkiln</td>
<td>1,271</td>
</tr>
<tr>
<td width="168">Eastergate</td>
<td rowspan="4" width="87">&nbsp;

&nbsp;

10358*

&nbsp;</td>
<td width="101">3,153</td>
<td rowspan="4" width="87">10,358</td>
<td rowspan="4" width="88">8,038</td>
</tr>
<tr>
<td width="168">Westergate</td>
<td width="101">2,083</td>
</tr>
<tr>
<td width="168">Slindon</td>
<td width="101">657</td>
</tr>
<tr>
<td width="168">Aldingbourne</td>
<td width="101">2,145</td>
</tr>
<tr>
<td width="168">Total</td>
<td width="87">116,066</td>
<td width="101">66,992</td>
<td width="87">44,879</td>
<td width="88">30,494</td>
</tr>
</tbody>
</table>
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[/accordion_item]

[accordion_item title="Treated Water Distributed"]

Our distribution input is the amount of water we put into our network each day and is our headline measure of demand. Looking across the year we can see our usual annual pattern was slightly exaggerated.  Though the maximum peak summer demand was lower than recent years, we saw above average levels extending beyond August as a result of the long, dry summer. From November we have seen below average levels as a result of the wet weather and leakage management activities.

<a href="https://www.portsmouthwater.co.uk/wp-content/uploads/2020/07/dist-input.png"><img class="aligncenter wp-image-10007 size-full" src="https://www.portsmouthwater.co.uk/wp-content/uploads/2020/07/dist-input.png" alt="" width="813" height="583" /></a>

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[/accordion_item]

[accordion_item title="Leakage"]

Portsmouth Water’s post-MLE outturn leakage figure for 2019/20 is 23.6 Ml/d, using the old methodology so that it can be compared to the rest of the AMP6 performance. This equates to 73 litres/property/day, lower than all other water companies in the UK performance for 2018/19 and likely to be industry-leading in 2019/20.

<a href="https://www.portsmouthwater.co.uk/wp-content/uploads/2020/07/leakage.png"><img class="aligncenter wp-image-10008 size-large" src="https://www.portsmouthwater.co.uk/wp-content/uploads/2020/07/leakage-1024x518.png" alt="" width="1024" height="518" /></a>

Since missing its target in 2017/18, Portsmouth Water’s recovery plan has reduced leakage by over 12 Ml/d through improved efficiencies and additional expenditure.

Enhanced activity in the recovery plan included;
<ul>
 	<li>additional fixed noise correlators;</li>
 	<li>flow and pressure logging and software to improve network understanding;</li>
 	<li>additional detection technician resources</li>
 	<li>Making improvements in leakage repair processes.</li>
</ul>
[/accordion_item]

[accordion_item title="Burst Mains"]

The number of burst mains experienced in 2018/19 was 347, exactly the same as 2017/18, compared to our annual target of 342.  It equates to 104 bursts per 1,000km in the reporting year.

A large number of bursts occurred in the summer of 2018 as the long dry period continued into the early autumn. This measure is very dependent on weather conditions.

<a href="https://www.portsmouthwater.co.uk/wp-content/uploads/2019/11/burstpipes20189.png"><img class="aligncenter wp-image-9039 size-full" src="https://www.portsmouthwater.co.uk/wp-content/uploads/2019/11/burstpipes20189.png" alt="" width="897" height="474" /></a>

[/accordion_item]

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<a href="https://www.portsmouthwater.co.uk/wp-content/uploads/2019/11/WRMP-Annual-Review-June-2019.pdf">To view a copy of the Annual Review for 2019, please click here</a>

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