<h4>2014</h4>

<p>Portsmouth Water has no large raw water storage reservoirs. We rely almost entirely upon groundwater reserves in the chalk aquifers of the South Downs and we abstract our raw water from wells, boreholes and springs. We have one river abstraction at Gaters Mill on the River Itchen, a chalk river with a groundwater baseflow.</p>

<p>Those reserves rise and fall with the seasons and so Portsmouth Water pays particular attention to the local hydro-geological data by monitoring rainfall at our Head Office, 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.</p>

<p>The resources are monitored on a daily basis and annually reviewed for comparison with long term performance.</p>

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

Rainfall: <p>Last year’s rainfall was characterized by less than average summer rainfall and greater than average autumnal and winter rainfall.</p>

<p>December, January and February saw rainfall exceed the long term averages for the months by 209%, 254% and 254%.  January rainfall of 205mm was the highest recorded rainfall for January since records began in 1886.  Annual total rainfall was 988mm and compares with the long term average of 765mm.</p>

<img src="/wp-content/uploads/2015/02/HavantRainfallAnnualReview14.jpg" alt="Havant Rainfall" class="aligncenter" />

Groundwater Levels: <p>The Company has monitored the groundwater level at Idsworth Well, Rowlands Castle, for many years since the well is unaffected by abstraction and is representative of groundwater conditions in the South Downs chalk.  Around 85% of Portsmouth Water’s abstractions are from underground sources and so groundwater levels are critical to maintaining supplies.</p>

<p>Groundwater in the local aquifer normally fluctuates approximately 9.5m between maximum and minimum annual levels.  Groundwater levels in the Autumn of 2013 were slightly lower than average due to lower than average rainfall in June, July and August.  Slightly above average rainfall in September and October saw groundwater levels start to recover and with the heavy rain of December, exceptional January and February rainfall groundwater levels dramatically recovered.  By 16 February groundwater rose to 35.5m, the second highest level recorded in the month of February since records commenced in 1932.  As is normal groundwater fell in the spring and by the end of March was 31.2m, still approximately 7m above the long term average.</p>

<p>The graph below shows the change in groundwater level over the last twenty-four months compared to the Long Term Average (last 30 years).</p>

<img src="/wp-content/uploads/2015/02/GroundwateratIdsworthAR14.jpg" alt="Groundwater Levels" class="aligncenter" />

Abstraction: <p>Abstraction from the Company’s various sources in 2013/14 was as shown in the table below:</p>

<table cellpadding="0" border="0">
	<tbody>
		<tr>
			<td><h5 align="left">Source</h5>
			</td>
			<td><h5 align="right">Licensed Annual</h5>
				<h5 align="right">Abstraction</h5>
				<h5 align="right">(Million Litres)</h5>
			</td>
			<td><h5 align="right">Actual 2013/14</h5>
				<h5 align="right">Abstraction</h5>
				<h5 align="right">(Million Litres)</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Northbrook</h5>
			</td>
			<td><h5 align="right">7,487</h5>
			</td>
			<td><h5 align="right">6,487</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Lower Upham</h5>
			</td>
			<td><h5> </h5>
			</td>
			<td><h5 align="right">303</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">West Street</h5>
			</td>
			<td><h5 align="right">3,328</h5>
			</td>
			<td><h5 align="right">2,966</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">West Meon</h5>
			</td>
			<td><h5 align="right">166</h5>
			</td>
			<td><h5 align="right">17</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">River Itchen</h5>
			</td>
			<td><h5 align="right">15,916</h5>
			</td>
			<td><h5 align="right">6,522</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Maindell</h5>
			</td>
			<td><h5 align="right">2,491</h5>
			</td>
			<td><h5 align="right">862</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Soberton</h5>
			</td>
			<td><h5 align="right">3,294</h5>
			</td>
			<td><h5 align="right">1,152</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Newtown</h5>
			</td>
			<td><h5> </h5>
			</td>
			<td><h5 align="right">52</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Worlds End</h5>
			</td>
			<td><h5 align="right">8,296</h5>
			</td>
			<td><h5 align="right">3,753</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Lovedean</h5>
			</td>
			<td><h5 align="right">4,148</h5>
			</td>
			<td><h5 align="right">97</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Havant & Bedhampton</h5>
			</td>
			<td><h5 align="right">35,770</h5>
			</td>
			<td><h5 align="right">18,005</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Walderton</h5>
			</td>
			<td><h5 align="right">9,955</h5>
			</td>
			<td><h5 align="right">7,065</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Woodmancote</h5>
			</td>
			<td><h5 align="right">1,364</h5>
			</td>
			<td><h5 align="right">628</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Fishbourne</h5>
			</td>
			<td><h5 align="right">3,741</h5>
			</td>
			<td><h5 align="right">1,102</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Funtington</h5>
			</td>
			<td><h5 align="right">2,920</h5>
			</td>
			<td><h5 align="right">2,079</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Lavant</h5>
			</td>
			<td><h5 align="right">9,950</h5>
			</td>
			<td><h5 align="right">4,997</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Brickkiln</h5>
			</td>
			<td><h5> </h5>
			</td>
			<td><h5 align="right">1,589</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Eastergate</h5>
			</td>
			<td><h5 align="right">10,358</h5>
			</td>
			<td><h5 align="right">1,749</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Westergate</h5>
			</td>
			<td><h5> </h5>
			</td>
			<td><h5 align="right">2,019</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Slindon</h5>
			</td>
			<td><h5> </h5>
			</td>
			<td><h5 align="right">667</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Aldingbourne</h5>
			</td>
			<td><h5> </h5>
			</td>
			<td><h5 align="right">2,543</h5>
			</td>
		</tr>
		<tr>
			<td><h5 align="left">Totals</h5>
			</td>
			<td><h5 align="right">119,184</h5>
			</td>
			<td><h5 align="right">64,654</h5>
			</td>
		</tr>
	</tbody>
</table>

Treated Water Distributed: <img src="/wp-content/uploads/2015/02/WeeklyTreatedWaterDistributedAR1314.jpg" alt="Treated Water Distributed" class="aligncenter" />

<p>The annual average distribution input dropped from 173.0 Ml/d in 2012/13 to 169.6 Ml/d to 2013/14.  The volume of water distributed is influenced by many things, including the weather.  The peak week of 210 Ml/d occurred in July and remained high in August most likely due to the low rainfall.</p>

<img src="/wp-content/uploads/2015/02/AnnualAverageTreatedWaterDistributedAR14.jpg" alt="Treated Water Distributed" class="aligncenter" />


Leakage: <p>As reported last year the Company had carried out a full, independent review of its leakage calculation and methodology.  The review had confirmed that there was an error in the calculation of the leakage figure and we determined that our leakage level was higher than we had been reporting by approximately 6.6 Ml per day for 2011/12.  This was reported immediately to Ofwat and the Company put in place a programme to reduce leakage which began in November 2012.</p>

<p>The leakage recovery programme has made excellent progress and for the full year 2013/14 average leakage was recorded at 29.5 Ml/d (2012/13 – 34 Ml/d) which is within the leakage target agreed with Ofwat and was achieved well ahead of our intended schedule.</p>

Burst Mains: <p>The number of burst mains experienced in 2013/14 was 226, compared to 267 that occurred in 2012/13.  The majority of the bursts occurred on 3”-6” cast iron mains and were generally associated with the swelling and shrinking of clay due to changes in soil moisture and temperature.  The number of bursts normally increases during the winter and the lower overall level of bursts this year is most likely to be due to the mild winter of 2013/14.</p>

<p>We continue to target mains for renewal based on the impact of bursts on customers.  The graph below indicates the overall reduction of bursts as a result of the renewals programme.  However, severe weather often demonstrates the importance of maintaining mains renewals at an appropriate rate.</p>

<img src="/wp-content/uploads/2015/02/BurstMainsAR14.jpg" alt="Burst Mains" class="aligncenter" />

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