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Water Safety Plan for Small Community Water Supply
Schemes
Dr S K WeragodaChief Engineer
Greater Dambulla WSP
01-04-2014
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Contents
• Introduction
• History of application in Sri Lanka
• Importance of applying WSPs
• Basic concepts in application of WSPs
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Introduction• Water Quality Surveillance or water quality testing is tedious
and resource wasting approach in ensuring water quality as
testing of sample is key factor.
• Application of ISO 9001 in water sector does not consider any
impact on water quality before the intake.
• Hence, Water Safety Plan (WSP) has become the principal tool
to assure safe drinking water (3rd and 4th Edition of WHO’s DWA
guidelines).
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WHO Water Safety Framework
Health- based targets
Water Safety Plans
System Assessment Monitoring
Management, Documentation & Communication
Surveillance
Public health context & health outcome
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From Theory to Best Practice
2003HACCP principles applied (Iceland,
Australia)
2004- 2006Implementation of WSPs (Uganda, Portugal, Brazil)
2010 onwardsMainstreamed by
utilities, regulators, banks, NGOs
2004WSPs included in
WHO GDWQ & IWA Bonn Charter
2007WSPs part of
E&W regulations
2009WSP auditing (NZ,
Australia, UK)
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History of Application of WSPs in Sri Lanka
• December 2004 tsunami highlighted the need of a proper water
surveillance system.
• Hepatitis A in 2007 in Gampola has shown the importance of
having a proper water quality management system
• Understanding the need;
– First training on WSP application in Colombo in Year 2010
– APN funded project between Sri Lanka and Singapore in Year 2011 –
2012
– WHO funded training program in Kandy in Year 2013
– Commenced to develop six WSPs
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How much water in the Human body?
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Adequate Water Helps Prevent…
• Headaches• Constipation• Kidney stones• Bladder cancer • Exhaustion and heat stroke• Heart attacks and strokes• ………..
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If
• Quality of the water is ???…..
• Physical • Biological• Chemical
From catchment to end user
From distribution to end user
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WSP application in Small Community WSSs
• What are small community water supply schemes? SCWSSs are defined
based on their population size, treatment capacity, treatment technology,
etc.
• What is a water safety plan? WSP approach is the assessment,
prioritization and continuous management of risk to water safety from
catchment to consumer.
• Why should apply WSPs to SCWSSs? Adopting an incremental improvement
plan means that improvements are made over time, moving gradually
towards meeting community, local or national water quality targets or
objectives.
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Water Safety Plan Continuous Improvement
Cycle(For Small Scale WTP)
Task 1 – Engage community and assemble a water safety
plan team
Task 2 – Describe the community water supply
Task 3 – Identify and assess hazards, hazardous events,
risk and existing control measures
Task 4 – Develop and implement an incremental
improvement plan
Task 5 – Monitor control measures and verify the effectiveness of the WSP
Task 6 – Document, review and improve all aspects of
WSP implementation
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WSP Ehiliyagoda
WBMLI Weerasekara,Senior Chemist,
Kegalle.
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WSP committee (Task 01)
1. Regional Level1. AGM - Coordinator2. Manager (O&M) - Member3. RSC Chemist - Team Leader4. CE(P&D) - Member5. Regional/Senior Chemist - Member6. Engineer(O&M) - Member7. Mechanical Engineer - Member8. Sociologist - Member 9. OIC - Member10. Dis. Envi. Committee - Member11. Catchment Dwellers - Member
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WSP committee con.
2. Top Level1. GM - Coordinator2. COL/AGM(WQ) - Team Leader3. Add. GMM - Member4. DGMM - Member5. AGM(Sociology) - Member6. RSC Chemists - Member7. Director (Health) - Member
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WSP Committee• Engaging the community and assembling a WSP team are
an essential means to:
– identify the community’s aspirations and needs in respect of
their water supply, through an inclusive process that considers
gender as well as elderly and vulnerable community members;
– balance water supply needs against competing community-level
priorities, such as housing and education;
– tap into local knowledge and experience in the identification,
assessment and management of risks;
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WSP Committee• Engaging the community and assembling a WSP team are an
essential means to:
– identify resources within the community that can be called upon
when needed;
– initiate a dialogue between the community and other stakeholders
(government, NGOs, water service delivery and public health
agencies) on the benefits and requirements of a well-functioning
water supply and the joint preparation of a WSP;
– raise awareness of the role that community members can play in
protecting and improving their water supply.
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Catchment
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WSP Module 02 (Task 02)
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Hazard (contaminant)A biological, chemical or physical property which may cause a
product to be unsafe for consumption • Biological - bacteria, viruses, protozoa, algae • Chemical – corrosion, pesticides, disinfection by products• Physical – pH, temperature, discolouration• Radiological
Hazardous Event (cause)• A practice or outcome that causes the hazard to become a
problem by its introduction into or proliferation in the water product
WSP Module 3 (Task 03)Hazard and Hazardous Event
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Risk MatrixSeverity/ Consequences
No/ Minor impact
Moderate Impact
Major Impact
Likelihood
Likely Medium High HighPossible Low Medium HighUnlikely Low Low Medium
High : High priority and requires urgent improvement in control measuresMedium : Medium or long term priority and requires improvement in control measures in the medium and long termLow : Not a priority
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Benefits of a WSP
• Avoid incidents which impact public health
• Improved compliance with regulatory and other requirements
• Improved consumer trust
• Improved confidence of key stakeholders
• Cost effectiveness and investment planning
• Improved staff commitment
• Competition with peers
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Global Water Crisis
A child dies every 15 seconds from a water-borne disease.
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But whole world worries about a single plane crash?
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Thank You
