NAIVASHA WATER, SEWERAGE
& SANITATION COMPANY LTD.
Naivawass is a Water Services Provider mandated to supply water
and sewer services within Naivasha Urban area and the environs.
In order to ensure reliable and sustainable services provision the
company seeks investment to upgrade its infrastructure in order to
meet the current and future demands for services. It aims to
increase access to safe water and sewer connectivity to the
residents of Naivasha town.
PRESENTATION NAKURU COUNTY
STAKEHOLDERS
WORKSHOP : BY
JOSEPH THEURI
MANAGING
DIRECTOR .
NAIVAWASS
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BACKGROUND
Naivasha City is located on the shore of Lake
Naivasha and along the Nairobi - Nakuru
highway. It’s a fast growing urban centre
within Nakuru County courtesy of flourishing
floriculture industry that contributes
approximately 3% of the Country’s GDP,
employs over 50,000 people. It has also of late
become attractive to investors in
manufacturing, tourism, and geothermal
production.
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Naivasha City is located on the shore of Lake
Naivasha and along the Nairobi - Nakuru
highway. It’s a fast growing urban centre
within Nakuru County courtesy of flourishing
floriculture industry that contributes
approximately 3% of the Country’s GDP,
employs over 50,000 people. It has also of late
become attractive to investors in
manufacturing, tourism, and geothermal
production. Of the 375,000 people in Naivasha
District (Census 2009), approximately half of
them reside within the urban area.
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Naivasha Water and Sanitation Company
(NAIVAWASS) is the mandated Water Services
Provider in this area - serving Naivasha town
and a growing number of formal and informal
settlements, currently ten. With an average
population of 8000 people, The Company is
responsible for water production and
distribution, wastewater collection and
treatment, network operation & maintenance.
NAIVAWASS aims to serve a growing number
of un/underserved people in its service area.
For Naivasha town, NAIVAWASS abstracts
water from six abstraction locations with a total
of 12 boreholes with depths ranging from 20 to
100 m.
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However not all boreholes are operational since
the system can not adequate absorb and
distribute all the produced water. The
customer connectivity for services is low. At
the same time most of the abstraction sites
yield water with high fluoride levels (beyond
the recommended World Health Organization
standards. So water from these sites is either
used sparingly (blending with that from other
sires) or pretreated which is quite expensive.
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The water distribution network and the Sewer
network require rehabilitation and extension to
areas which are not served.
The Sewerage Treatment Plant requires to be
expanded to accommodate the current and
anticipated increase in sewer inflow.
THE FUTURE
Within the next 2 years the company will be
expected to serve more domestic and commercial
customers and at the same time meet the growing
needs of Industrial Customers. Keroche Breweries is
among the key industrial customers the company is
currently serving.
April 13, 2015
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Apart from our current production the
company requires to produce 350 M3 /Hr in
two years. In two years time Keroche Breweries
alone is expected to increase its water demand
by ten times from the current average of
25,000M3 per month.
Consequently when we look at our current
production capacity from six production sites
we have 423m3 of water produced per hour.
However among the six sites only two sites
DTI and Karati has water which is not polluted
with Fluorides.
DTI and Karati sites can produce only 224m3 per
hour. Hence when you look at the bigger
picture, we have available 4500 M3 per day of
fluoride free water that can be availed to the
residents but this is not happening due to the
existing design of our Network which can be
addressed by investing in further extensions
from the two sites.
It’s important to note that the water demand for
Naivasha urban area stands at 8,000 m3 per
day. Unfortunately, as much as we can produce
the amount albeit not of good quality we are
yet to meet the demand since we have
enormous gaps in our distribution network
that contribute to low accessibility of services.
Hence we have to deal with the issue of
investment in Water production and
distribution at the same time.
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Going by the forecasted demand we need to
produce 350m3 per hour or more above the
current production. If we were to target get our
water from only the sites with quality water we
can have each borehole at DTI producing 70m3
per hour and at Karati the average production
per Borehole is 38m3 per hr.
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The other option we have to abstract water for
Naivasha can include surface water from a
proposed Dam to be constructed at Gitiri Dam.
A pre-feasibility study has been done but we
require a more elaborate study to enable us
make appropriate justification of getting water
from the Dam.(The cost of putting up the Dam
and the transmission lines was put at around
Kshs. 1.2 Billion). Back to the issue of Boreholes,
our proposal is to bridge the demand gap by
getting more water that is at least, 210m3/hour
at DTI and 140m3/hour at Karati production
site. Hence we will require drilling three
Boreholes at DTI and 4 others at Karati going by
the anticipated average yield of each borehole.
So for the time being, we will go with the option
of using ground water sources. Apart from
drilling the boreholes we need to develop the
distribution network and at the same time we
need to rehabilitate the existing network which is
highly dilapidated. We also have to identify gaps
existing in our current service area which are not
adequately served. We have to address the issue
of managing loss of water through leaks and
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bursts that is currently significantly
contributing to the Non-Revenue water by
replacing old and spaghetti Network of pipes
in identified zones.
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Below are estimates for the necessary activities.
Drilling boreholes (7)
17,500,000
Developing Transport lines
198,750,000
Extending network services
105,089,000
Reservoirs (2)
5,000,000
Subtotal
326,339,00
Add 15% Consultancy
49,950,850
Add 16% Contingencies
52,214,240
Total sewer cost is
427,504,090
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Currently our sewerage system has overstayed
its project life. While the Company has a
reticulated system the direct accessibility of
services is limited to below 30%. However a
good number of the rest make use of septic and
the Exhauster Service is a Booming business.
The exhaust is eventually offloaded into our
Sewerage Treatment Plant by private vendors.
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The capacity of our plant is totally inadequate
together with our sewer network since it was
meant to cater for a smaller population than the
current which is about 10 times more. As
previously indicated a proper more detailed
study is required to establish whether to
develop a totally new system or upgrade the
current one. The first option can be a longer
term option compared to the second option
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Our current system is highly overloaded due to
the design capacity which has been overtaken
by population growth. At the same time the
Municipal Council overtime have
accommodated residents to connect storm
water into our system. When it rains the system
can’t cope and due to overloading the sewer
spill all over creating a lot of filth mostly in the
CBD?
As the company plans to expand and extend the
sewer network, the county Government of
Nakuru who carries, the storm water
management mandate requires investing in
storm water drainage channels which are
inadequate. In most areas the developers are
left with the only option of draining the storm
water into our system which is meant to handle
sewer only. However over time even where
drainage channels may be available the
residents tend to be allowed to release water
into the sewer system.
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We would urge the County Government to
devise a strategy enforce disconnection of such
connections since the buildings designs and
construction had already been approved by the
preceding Municipal Council to have the storm
water finding its way into the Sewer system.
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As mentioned eelier for us to come up with
reasonable proposals we are handicapped by
lack of all the information to determine
whether to go for the option of putting up a
totally new system which will include
relocating the treatment works to a site which
is the Western part of the Town (lower grounds
and also off the wind). This would address the
issue of smell which is all over the town
whenever the wind blows and we are doing
aeration.
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The other option would be to upgrade our
current system to urgently address the
enormous gaps which include:Extension of services
Narrow sewer pipes
Redesigning of the system in some areas (to
address gradient issue).
Putting up additional ponds /wetlands
Fencing etc.
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Below are estimates for the key activities:
Extension Kayole/ sewer line
30,531,000
Extending the existing network
295,660,000
Putting new sewer ponds
90,916,000
Disludging the existing pond
2,000,000
Sub Total
419,927,000
Add 15% Consultancy
62,866,050
Add 16% Contingencies
67,057,120
Total for sewer is
549,030,170
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Conclusion
The total investment required to improve our
water and sewer system during the next two
years will be:-
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Water kshs
Sanitation Kshs
427,504,090
549,030,170
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Grand Total Kshs.
976,534,260
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1.Existing water production System
2. Proposed water production plan
3. Budget Estimates
4. Sample Base prices
5. Water Estimates
6. Sewer Estimates