10th December 2018
Environmental Information Request Response
Ref: EIR/11/052
Dear Ms Ryland,
1. Background
I refer to your request for information under the Environmental Information Regulations 2004
(“the Regulations”), which reads as follows:
Dear Thames Water,
Please provide the following information with respect to the parish of Bramshott and Liphook:
1. in respect of all blockage call-outs in Bramshott and Liphook since 2010 state:
-The cause of the blockage
-The solution to the blockage
-Whether the blockage is part of a systemic problem
2, with respect to the relevant treatment plant(s) serving the parish of Bramshott and Liphook
state the :
-capacity of the plant, namely its maximum total hydraulic flow per day for fully treated water.
This figure should not include partially treated water or screened water or untreated water
discharged from plant when this capacity is exceeded. It should only include water that has been
fully treated at the plant.
-The hydraulic flow into the plant per day of water from the network it serves. Please break down
the figures into maximum hydraulic flow, minimum hydraulic flow, and average hydraulic flow.
-an accurate calculation of the operating status of the plant, namely its loading, comparing its
maximum treatment capacity (not including partially treated or screened or untreated water) with
the maximum and average hydraulic flow into the plant. Please give this figure as a percentage
of maximum full treatment capacity (as indicated in question 1.)
Yours faithfully,
Raine Ryland
2. Thames Water's response
348 blockage clearances were completed in Bramshott and Liphook between 1st January 2010
and 25 November 2018. Another 9 clearances were completed in the neighbouring villages of
Conford, Passfield and Hook, which are part of the same drainage catchments as Bramshott and
Liphook.
The tables below detail how many blockages were cleared in each year and the cause of the
blockages.
Registered address: Thames Water Utilities Limited, Clearwater Court, Vastern Road, Reading RG1 8DB
Company number 02366661 Thames Water Utilities Limited is part of the Thames Water Plc group. VAT registration no GB 537-4569-15
Number of blockage clearances per year
Year
Bramshott
Liphook
Conford
Hook
Passfield
Total
2010
10
20
30
2011
14
11
25
2012
15
9
1
25
2013
16
14
1
1
32
2014
22
30
1
53
2015
23
31
1
1
56
2016
29
24
2
55
2017
14
33
1
48
2018
6
27
33
Total
149
199
1
1
7
357
Cause of blockages
2010
2011
2012
2013
2014
2015
2016
2017
2018
Total
Paper/Rag
17
14
16
17
23
38
27
34
21
207
Fat/Grease 6
7
2
4
8
6
16
8
5
25
Roots
1
6
3
12
3
2
2
6
24
Defect
3
3
6
7
1
1
1
30
Debris
3
4
2
4
52
Silt
1
2
54
Unknown
1
2
53
Scale
1
1
47
3rd Party
1
33
Total
30
25
24
30
52
54
53
47
33
348
Bramshott and Liphook are served by Bordon Sewage Treatment Works (STW). The STW is
currently in good working condition with no major assets out of service.
The maximum flow to full treatment for Bordon STW is 234 litres/second (l/s).
The most recently reported flow data from the Final Effluent flow meter from 16 October to 16
November was;
Maximum flow (11 November) - 299.996 l/s
Maximum daily flow (11 November) - 24,456 m3/d
Minimum flow – 41.11 l/s
Average flow – 109.56 l/s
As a percentage, the average flow is 46.82% of Full Flow to Treatment.
The information provided with this letter is taken from the information we hold on our records as
at the date indicated. We cannot guarantee the accuracy of this information and it should not be
relied on for any purpose.
Under the Regulations, Thames Water has a duty to individuals requesting information to make
that information available on request and in the format requested, and must comply with this
duty, unless one of the exceptions contained within the Regulations applies.
On this occasion, we have waived the fee chargeable to cover our costs for complying with your
request however; we reserve the right to charge in accordance with the fees published on our
website for any future requests. Please see the link below for our Interim Charging Scheme on
our website:
https://corporate.thameswater.co.uk/About-us/Protecting-our-
environment/Managing-our-impact/Environmental-information-regulations
3. Further queries
Should you have any questions, please contact me by emailing
xxx.xxxxxxxx@xxxxxxxxxxx.xx.xx If you are dissatisfied with the handling of your request, you have the right to ask for an internal
review. Internal review requests should be submitted within six months of the date of receipt of
this response and should be addressed to Environmental Information Requests Manager and
emailed to
xxx.xxxxxxxxxx@xxxxxxxxxxx.xx.xx
If you are dissatisfied with the outcome of the internal review, you can apply, without charge, to
the Information Commissioner, who will consider whether Thames Water has complied with its
obligations under the Regulations, and can require Thames Water to remedy any problems. You
can find out more about how to do this, and about the Regulations in general, on the Information
Commissioner’s website at:
www.ico.org.uk Complaints to the Information Commissioner can
be made via the "report a concern" section of the Information Commissioner's website.
Yours sincerely,
EIR Officer