North West Province
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CHAPTER 9 – NORTH WEST PROVINCE Provincial Green Drop Score 50% Provincial Best Performer Tlokwe Local Municipality is the best performing municipality in North West Province: 97% Municipal Green Drop Score 100% improvement on 2009 Green Drop status 100% of plants in low risk position 92% Site Inspection Score 1 of one system Green Drop Certification status NORTH WEST Page 293 Introduction Wastewater services delivery is performed by ten (10) Water Services Authorities in North West Province via an infrastructure network comprising of 35 wastewater collector and treatment systems. A total flow of 144 Ml/day is received at the 35 treatment facilities, which has a collective hydraulic design capacity of 316 Ml/day (as ADWF). This means that 45.6% of the design capacity is taken up by the current operational flows, leaving a 54.4% to meet the future demand without creating new capacity. However, the findings of the Green Drop assessment suggest that a significant portion of surplus capacity might not be ‘readily available’, as result of inadequate maintenance and operational deficiencies at lower capacity municipalities. MICRO SMALL MEDIUM LARGE SIZE SIZE SIZE SIZE MACRO SIZE Total 10-25 <0.5 0.5-2 2-10 >25 Mℓ/day Undetermined Mℓ/day Mℓ/day Mℓ/day Mℓ/day Mℓ/day No of WWTPs 0 6 21 3 4 1 35 Total Design Capacity 0 6.9 99.6 50.3 159 1 315.8 (Ml/day) Total Daily Inflows 0 0.8 55.0 24.4 63.6 18 143.8 (Ml/day) *ADWF = Average Dry Weather Flow Provincial Green Drop Analysis Analysis of the Green Drop assessments and site inspection results indicate that performance vary from excellent to unsatisfactory. A total of 100% municipalities were assessed during the 2010/11 Green Drop Certification. NORTH WEST Page 294 GREEN DROP COMPARATIVE ANALYSIS Performance Performance Category 2009 2010/11 trend Incentive-based indicators 8 10 Number of municipalities assessed (77.6%) (100%) ↑ Number of wastewater systems assessed 17 35 ↑ Average Green Drop score 33% 29% ↓ 5 6 Number of Green Drop scores ≥50% (29%) (17%) ↓ 12 29 Number of Green Drop scores <50% (71%) (83%) ↓ Number of Green Drop awards 0 1 ↑ Average Site Inspection Score N/A 45.3% N/A PROVINCIAL GREEN DROP SCORE N/A 50% N/A N/A = Not applied ↑ = improvement, ↓= digress, →= no change The 100% assessment coverage included a total of 35 wastewater systems for North West. This magnitude of coverage serves as affirmation of the increased awareness and renewed commitment by municipal management. Through the current Green Drop process, municipalities are renewing their operational baselines and reprioritise their plans with the primary objective of raising the current performance status in terms of municipal wastewater management. The incentive-based regulatory approach succeeds to act as a positive stimulus to facilitate improved performance and public accountability, whilst establishing essential systems and processes to sustain and measure gradual improvement. Analysis of the results indicate that the majority of systems (83%) lies in the lower scoring bracket of <50%, indicating that wastewater performance is not on standard in the Province. The average GDC score decreased from 33 to 29%, showing an overall digress on average performance. The regulatory opinion is that performance of the Province as a whole is unsatisfactory, as reflected by the average Municipal Green Drop Score of 50%. NORTH WEST Page 295 When comparing 2010/11 Green Drop results with 2009, the following trends are observed: 18 more systems were assessed in 2010 (35) compared to 2009 (17) 1 systems achieved Green Drop Certification, indicating that one systems is considered ‘excellent’ (>90%) × 82.4% of assessed systems performed ‘very poor to critical’ in 2009 compared to 83% in 2010/11, of which 59% systems were in ‘critical performance’ state in 2009 compared to 66% in 2010/11. Provincial Risk Analysis The Green Drop requirements are used to assess the entire value chain involved in the delivery of municipal wastewater services, whilst the risk analyses focus on the treatment function specifically. CUMULATIVE RISK COMPARATIVE ANALYSIS Performance Performance Category 2009 2010/11 trend Risk-based indicators Highest CRR 28 25 ↓ Average CRR 16.5 16.3 ↓ Lowest CRR 6 9 ↑ Average Design Rating (A) 1.7 1.5 ↓ Average Capacity Exceedance Rating (B) 3.7 4.0 ↑ Average Effluent Failure Rating (C) 7.0 7.5 ↑ Average Technical Skills Rating (D) 3.3 2.9 ↓ AVERAGE % DEVIATION FROM maximum- 78.4 79.4 CRR ↑ N/A = Not applied ↑ = digress, ↓=improvement, →= no change NORTH WEST Page 296 From the above table, it can be observed that the Province still finds itself in ‘high risk’ space with 79.4% CRRmax. However, a positive risk reduction is observed on provincial averages, such as the highest CRR that decreased from 28 to 25↓, leading to a reduced Provincial average CRR of 16.3 (↓). Unfortunately, the counter profile is also true where the lowest CRR plants of 6 have moved into a higher CRR of 9 (↑). The CRR analysis further points out that good effort has be made to address the technical skills component in the Province. However, the risk factors dealing with plant capacity and effluent quality still require significant effort to ensure positive turnaround. The results indicate that (on average) the Province may be in the infancy of a positive turnaround of its risk profile, but that efforts need to be redoubled to gain momentum and ensure dedicated reduction in individual CRRs. Some plants are still sliding into higher risk positions and these have been placed under regulatory surveillance with the objective of ensuring improvement. As such, water resources and public health will suffer whilst the Province gears itself to close the gaps with urgency. These municipal treatment plants are clearly identified in this Chapter under “Regulatory Impression”. The following trend bar-chart paints a hopeful picture for wastewater treatment in North West. Although most plants still reside in high and critical risk position, a determined movement OUT OF critical risk position towards high risk space is noted. The trend is encouraging. Whilst the number of plants in medium risk position remains constant (5), the movement of 8 plants out of ‘low risk’ space is disheartening. One must be mindful that the 2009 and 2011 profile differ in terms of Merafong municipality that moved to Gauteng Province. Nevertheless, the early warnings are clear that some low risk plants are entering higher risk space and this trend need to be arrested. Experience has learnt that the cost and specialist resources are much higher to address critical risk scenario, compared to earlier interventions when detecting early warning signals of a plant moving into distress. An unusual strategy and turnaround plan would be required for Limpopo to recover from this atrocious state. 90 – 100% Critical risk WWTPs % Deviation = 70 - <90% High Risk WWTPs CRR/CRR(max) TREND 50-<70% Medium risk WWTPs <50% Low Risk WWTPs NORTH WEST Page 297 The following municipalities are in high- and critical risk positions in 2010/11 and placed under regulatory surveillance: 2011 Average Priority WSA Name WWTPs in high or critical risk space CRR/CRRmax % deviation 100% 1 Ventersdorp LM Ventersdorp 94% 2 Maquassi Hills LM Leeudoringstad, Wolmaranstad Delareyville, Lehurutshe-Welbedacht, Ottosdal, NgaraModiriMolema 91% 3 Sannieshof, Zeerust, Itsoseng, Mmabatho, Lichtenburg, DM Mafikeng, Atamelang, Coligny 83% 4 Kgetlengriver LM Koster, Swartruggens Dr. Ruth S Mompati 80% 5 Bloemhof, Schweizer-Reinecke, Vryburg, Christiana DM 78% 6 Madibeng LM Brits, Hartbeespoort, Letlhabile, Mothotlung Matlosana LM 78% 7 Klerksdorp, Orkney, Hartebeesfontein Rustenburg LM 65% 8 Boitekong, Lethabong Critical risk plants High risk plants Conclusion The Green Drop results for 2010-2011 indicated that municipal wastewater management in North West is not in a satisfactory state. The majority of wastewater systems reside in high risk state, compared to 2009. Furthermore, the average Green Drop score decreased from 33 to 29%. The Provincial Green Drop score of 50% indicate that decision making and resources to support turnaround plans, will be required to improve the situation. The positive message from the Green Drop results is that a definitive awareness momentum is building and all municipalities are on board with their performance portfolios. The 100% assessment coverage has resulted in a confirmed baseline, from where progress can now be monitored and regulatory surveillance can be effected. One Green Drop Certificate is awarded in North West: Tlokwe Local Municipality Performance Barometer The following log scale indicates the various positions that municipalities hold with respect to their individual Municipal Green Drop Scores: NORTH WEST Page 298 1 2 3 4 5 6 7 8 9 10 NORTH WEST Page 299 Water Services Authority: Dr Ruth S Mompati District Municipality Municipal Green Drop Score: 21.9% Schweizer Vryburg Bloemhof Christiana Performance Area Reinecke (WSP: Naledi LM) (WSP:LekwaTeemane) (WSP:LekwaTeemane) Systems (WSP:Mamusa LM) Process Control, Maintenance & 50 15 8 3 Management skills Monitoring Programme 0 0 0 0 Credibility of Sample Analyses 10 0 0 70 Submission of Results 0 0 0 0 Wastewater Quality Compliance 5 20 0 0 Failure Response Management 0 25 25 0 Bylaws 40 40 40 30 Treatment & Collector Capacity 50 40 48 85 Asset Management 40 55 45 45 Bonus Scores 8.75 8.75 0 8.75 Penalties 0 0 0 0 Green Drop Score (2011) 21.3% (↑) 25.6% (↑) 16.8% (↑) 21.8% (↑) Green Drop Score (2009) 6% 2% 2% 2% Treatment Capacity (Ml/d) 6.5 9 5.6 3.5 Operational % i.t.o. Capacity 91% 73% 85% 80% Cumulative Risk Rating (CRR) 18 18 18 15 % i.t.o. Maximum Risk Rating 78.3 % (↓) 78.3% (→) 78.3% (↑) 83.3% (↓) NI - No information NA- Not assessed Regulatory Impression Dr Ruth S Mompati District Municipality is the responsible authority overseeing the operation of the wastewater systems by the WSPs (Naledi, Mamusa, LekwaTeemane, Greater Taung, Ratlou and Molopo municipalities).