BLUE Drop. Overview of current requirements

Transcription

1 BLUE Drop Overview of current requirements SALGA / Ethekwini / MILE / IMESA Training Workshop Mariette Swart Depart: Water Affairs Directorate: Water Services Regulation

2 Blue Drop 2011 Requirements DWQ Compliance (30%) To obtain certification, a score of 95% is required; This would include adherence to Excellent Quality Requirements as stipulated by the WHO Guidelines Monitoring Programme (15%) Analysis Credibility (5%) DWQ Data Submission (5%) DWQ Asset Management (15%) DWQM Publication (5%) Process Controlling (10%) Water Safety Plan Process & Incident Response Management (15%)

3 2011 Blue Drop Performance Blue Drop Assessment Progress In spite of the nr of water supply systems increasing from 787 to 914, evident gradual improvement in the manner DWQ is being managed The national Blue Drop score (calculated against performance of all systems assessed) increased to 72.9% year 1 year 2 year 3 Series1

4 Blue Drop 2011 Performance 66 water supply systems obtained the coveted Blue Drop certification. This is an increase of 73% on last year s 38. The number of systems scoring higher than 50% increased from 370 to 536. BUT, there is still concern over the 378 smaller systems that scored less than 50% (even though this figure decreased from 417 for 2010).

5 Actual Drinking Water Quality Compliance Comparison 99.50% 99.00% 98.50% 98.00% 97.50% 97.00% 96.50% 96.00% 97.30% 97.50% 99.50% 99.00% 99.00% 99.00% Micro Chemical Physical y2010 y These compliance percentages stems from the data for the years 2009 and 2010, reported in the BD reports of 2010 & 2011 respectively 2. The actual drinking water quality compliance remained more or less the same in spite of a huge increment in number of analyses performed 3. The tightening of SANS 241 might have an affect on the compliance figures over next two years

6 Water Safety Planning 1. A concept introduced by the World Health Organization (WHO) to ensure that all possible risks are managed to ensure the continued supply of safe drinking water. 2. South Africa noted as one of the countries in the world where this concept is developing fastest (WHO and International Water Association). 3. Even though 490 systems were found to have water safety plans in place, the Blue Drop Process revealed that 349 adhered to acceptable implementation requirements. Status of Water Safety Plan KZN FS LMP NC WC EC GP MPU NW Unsatisfactory 0-29% Satisfactory 30%-60% Acceptable >60%

7 Blue Water Services Performance Audit Regulatory Performance Management System (RPMS) - 9 KPI s Financial expenditure Jul 10 to Jun 2011 Water Supply System Water Supply System Water Supply System Water Supply System Jan to Dec System specific information, i.e. System risks Monitoring / compliance Asset management (finance / staff)

8 KPI 5 & 6 KPI 7 customer services standards = incident management DWQ Compliance (30%) Monitoring Programme (15%) Analysis Credibility (5%) DWQ Data Submission (5%) Water Safety Plan Process & Incident Response Management (15%) Process Controlling (10%) DWQM Publication (5%) DWQ Asset Management (15%) KPI 8 institutional effectiveness = finance = bylaws (WW) = WSP process communication = staff = performance publication KPI 9 financial performance = actual expenditure (O&M as per KPI 10) KPI 10 asset management = asset register KPI 11 water use efficiency = amount in / amount out

9 KPA 1: Risk Management (30%) DWQ Compliance (30%) Monitoring Programme (15%) Analysis Credibility (5%) DWQ Data Submission (5%) Water Safety Plan Process & Incident Response Management (15%) Process Controlling (10%) DWQM Publication (5%) DWQ Asset Management (15%) KPA 2: Process Management & Control(15%) KPA 3: Drinking Water Quality Compliance (30%) KPA 4: Management, Accountability & Local Regulation (10%) KPA 5: Asset Management (15%)

10 Water safety planning PROCESS a.) The Water Safety Planning Process is steered by a group of people that includes the technical, financial and management staff of the municipality. Where a WSP arrangement exist the WSA and WSP should partake in this process. b.) There should be clear indication that the water services institution conducted a water safety planning process and not only drafted a document. c.) There should be clear reference to the specific water supply system at hand and not only global risk management measurements put in place. Risk assessment a.) The Risk Assessment must cover both treatment and reticulation. b.) The Water Services Institution (WSI) must provide information on findings of the Risk Assessment (and detail Risk Prioritisation method followed) for the specific water supply system including water resource quality. Format not important but it should be proven not to be a desktop study. c.)the Water Safety Planning process must include (adequate) Control Measures for each significant hazard or hazardous event identified. d.) A Water Quality Risk Assessment conducted for at least 80% of the SANS 241 list of determinands. This is to verify whether treatment technology is adequate to treat the raw water to comply with national standard level. Water Safety Planning Process and Risk Assessment

11 Risk-based monitoring programme a.) Prove Operational Monitoring is: i) Informed by the Risk Assessment ii) Required sites to monitor: Raw water, after filtration (per process unit) and final water. iii) Determinands: ph, turbidity and disinfectant residual iv) Frequency of analyses: at least once per shift (i.e. every 8 hours) v) Equipment used + Evidence of calibration (or any other means of ensuring credible readings for the past 3 years). b.) Prove Compliance Monitoring is: i) Informed by the Risk Assessment. ii) Monitoring programme is registered on BDS. iii) Actual monitoring occur according to registered BDS monitoring programme (80%). iv) Required sites monitored: Water works final & distribution network + Frequency of analyses: Water works final according SANS 241; distribution monthly. v) Coverage of population served must at least be 80% Data credibility Incident Management Protocol

12 PROCESS MANAGEMENT & CONTROL 1 Works classified according to Regulation Process Controllers must be Registered according to Regulation 2834 (nr vs. requirement to operate plant) Introduction of Reg 17 3 Availability of water treatment works logbook PROCESS CONTROL BONUS

13 1 Microbiological (Overall, SANS 241: 2006) 2 Chemical (Overall, SANS 241: 2006) Compliance Risk-based monitoring Operational efficiency index 1 Hard-copy vs BDS Data 2 Sufficient (11) months of data submitted 3 Management of continuous failures

14 Management, Accountability, & Local Regulation 1 Management commitment (signature): Water Safety Plan; DWQ Monitoring Programme; Water Treatment Plant Logbook; Operations and Maintenance Budget; Water Services Development Plan 2 Publication 3 Service Level Agreement 4 12-Month Data Submission BONUS: Workplans aligned to O&M

15 Asset Management 1 ANNUAL PROCESS AUDIT 2 ASSET REGISTER 3 AVAILABILITY & COMPETENCE OF MAINTENANCE TEAM 4 OPERATIONS & MAINTENANCE MANUAL 5 OPERATIONS & MAINTENANCE BUDGET AND EXPENDITURE 6 DESIGN CAPACITY vs.. OPERATIONAL CAPACITY

16 South African National Standard (SANS 241) for Drinking Water 2011 SALGA / Ethekwini / MILE / IMESA Training Workshop Mariette Swart Depart: Water Affairs Directorate: Water Services Regulation

17 South African National Standard (SANS 241) for Drinking Water 2011 Fundamental changes Class I limits - suitable for lifetime consumption Class II limits - maximum allowable for limited duration were used as acceptable limits for normal operation Application information was an Informative Annexure, i.e. non-mandatory

18 Principles Overall objective is the protection of public health Based on WHO limits: All health-related WHO limits should be maintained LATEST TO APPLY Aesthetic limits can be slightly relaxed if there is a significant economic implication of a more stringent limit

19 SANS 241: 2011 Standard divided into SANS and SANS 241-2: Part 1 includes the numerical limits Part 2 is the application of SANS Both Parts are Normative i.e. mandatory

20 SANS 241: 2011

21 Microbiology Table 1 Determinands classified according to risk Single limit, not statistical approach

22 Table 2: Physical, aesthetic, operational & chemical May have two limits for different risks Single limit per risk

23 Other Changes Additional determinands required to be monitored, for example uranium, algal toxins Some limits are more stringent, for example Cadmium from 10 µg/l (2006) to 3 µg/l (2011)

24 Analysis Any method is acceptable which can offer the necessary limit of quantification with regard to: Trueness Precision Limit of detection Test-kit methods may be used, particularly for operational monitoring, if they offer the required performance

25 SANS 241: 2011

26 Management actions to achieve the numerical limits specified in SANS Responsibility WSA / WSP Conventional treatment plants Borehole systems minimum requirements

27 Key elements for management actions 1. water quality risk assessment intake water to point of delivery 2. routine monitoring operational & compliance (location of sampling points, frequency & determinands) 3. response monitoring incident management / increased monitoring of DWQ following non-compliance 4. verification of water quality calculate compliance with numerical limits; and 5. water safety plan address outcomes of above planning process

28 Water quality risk assessment Identify & document all potential hazards & risks in the supply chain Hazards grouped according impact on human health and quality of the water determinands with acute health impacts determinands with chronic health effects organic or radionuclide contaminants have an aesthetic impact of operational importance Pending the nature of the risks identified implement adequate MONITORING of all risks + corrective / VERIFICATION measures

29 Water quality risk assessment Analyse for all water quality determinands listed in tables 1 & 2 of SANS 241-1: Additional determinands anticipated to be in the water Catchment land uses and activities Analysis on intake waters should exclude those determinands formed only after treatment

30 Frequency ensure that all spatial & temporal risks are apparent (minimum annually) periods anticipated with most unacceptable intake water quality during peak demand in the event of the following situations: occurrence of any change in the intake water supply potentially leading to the institution not complying with SANS 241; after a failure of any component of the treatment process potentially leading to the institution not complying with SANS 241; a new or refurbished treatment system is put into service; a new distribution system is altered or re-commissioned such that information on all spatial & temporal risks are not available

31 Location A WQ risk assessment shall provide info on WQ at the following locations: water abstracted for purification intake water water emanating from a treatment plant final water representative points of delivery from water services providers; and representative points of delivery to consumers distribution zone to ensure 80% coverage of supply system each distribution zone monitored at its furthest supply point (includes outlets from reservoirs and towers)

32 Interpretation Sample point Action Intake Water Final Water Treatment insufficient Address with control Monitoring activity 1 + Monitoring activity 2 Intake Water Final Water Adequate treatment Verify ongoing treatment Monitoring activity 1 + Monitoring activity 2 Intake Water Final Water Risks within acceptable limits Monitoring activity 1 + Annual analyses of all other determinands listed in SANS Intake Water Final Water Added to the water during the treatment process (aluminium, iron, disinfectant residuals) Monitoring activity 1 (treatment chemicals) Optimise treatment Input points to contracted bulk Distribution delivery points to customers Monitoring activity 1 + Monitoring activity 2

33 Routine monitoring a) Activity 1 (routine monitoring) b) Activity 2 (follow-up on the risk assessment)

34 Determinands & frequency of analyses Monitoring activity 1 Table 1 Minimum monitoring for process indicators Determinand Minimum monitoring frequency Intake water Final water Distribution system Conductivity or total dissolved solids Daily Daily Not applicable ph value Daily Once per shift Fortnightly Turbidity Daily Once per shift Fortnightly Disinfectant residuals Not applicable Once per shift Fortnightly E. coli (or faecal coliforms) Not applicable Weekly Fortnightly but dependent on population served Heterotrophic plate count Not applicable Weekly Fortnightly Treatment chemicals Not applicable Weekly Fortnightly Disinfection sustained at value defined by institution If non-compliant, corrective action + follow-up sampling Reduced variability of groundwater quality, analyse monthly

35 Determinands & frequency of analyses Monitoring activity 1 Minimum sample numbers for E. coli (or faecal coliforms) in distribution systems Population served Total number of samples per month* (minimum) < to per head of population to per head of population per head of population * During the rainy season, sampling should be carried out more frequently to ensure that all spatial and temporal risks are apparent

36 Determinands & frequency of analyses Monitoring activity 1 Frequency of analyses for determinands identified during the risk assessment exceeding the numerical limits in SANS Risk Frequency Infrastructure optimisation Acute health 1 Weekly Ensure optimised Acute health 2 Monthly functioning of infrastructure Chronic health Monthly Infrastructure change If problem is not resolved, obtain necessary infrastructure Aesthetic Operational Monthly Weekly Monitoring to continue until such time that the identified determinand no longer constitutes an unacceptable risk

37 Water Safety Plans "move away from the mindset of monitoring to verify the quality of water with the assumption that the water is safe, toward one of monitoring to detect contamination most effectively with the knowledge that contamination potential is always present. This requires information that will increase the understanding of the entire water supply chain and provide improved insight on hazards, risks, treatment performance and overall vulnerability of the water supply chain"

38 Thank you for your attention