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Green Drop Assessment: Top 10 Performance Analysis

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South Africa: Top 10 WSA Performers

WSA	Number of Works	Provincial Green Drop Score	Risk Profile [CRR as % of CRR(Max)]	Average Green Drop Score	Green Drops Awarded	% Systems that achieved >50%	Rank
Tlokwe City Council	2	97.0%	35.7%	97.0%	2	100.0%	1
Bitou	2	96.5%	22.0%	96.3%	2	100.0%	2
George	6	90.5%	56.8%	58.8%	1	66.7%	3
eThekwini Municipality Metropolitan	28	90.5%	45.6%	87.1%	9	100.0%	4
City of Johannesburg Metropolitan	7	90.2%	49.4%	89.5%	4	100.0%	5
Witzenberg	4	89.7%	43.1%	85.4%	1	100.0%	6
Mossel Bay	8	89.2%	39.4%	75.3%	2	75.0%	7
Overstrand	5	88.8%	39.1%	84.3%	1	100.0%	8
Mbombela	8	87.2%	42.5%	65.7%	1	75.0%	9
City of Cape Town Metropolitan	26	86.8%	55.9%	85.8%	11	96.2%	10

Top Performers

(Show footnote)

The national position on wastewater service performance is a variation from excellent to very poor. The one accomplishment that can be attributed to municipalities in South Africa is the marked increase in submission of evidence for Green Drop assessment, and the subsequent 100% coverage of all systems. This mark and important reference point which few countries can claim credit. As such, the Regulator has a complete database of the exact strengths and gaps per municipality and per wastewater system from where gradual and sustainable improvement can be facilitated and measured on a continuous basis.

The way forward is contained in a progressive Green Drop programme which alternates the Green Drop assessments with regulatory implementation on ground level, which will be directed by the Green Drop information. In 2011 to 2012, the Regulation Unit will be engaging (within predetermined Regulatory Inspectors Panels) with allocated Water Services Authorities in order to measure progress on the published Green Drop Reports as well as WS Regulation Performance Publications (RPMS). This would mean that panels will be:

Monitoring rectification processes (which will include planning initiatives, technology choices, MG applications, etc);
Gauge GDS and RPMS activity;
Work with low performing municipalities to identify key areas of focus for turnaround and to perform proper performance audits;
Monitoring Service Level Agreements vs. Actual Service Delivery/performance by service providers;
Allow for the Municipal Cross Pollination programme to take effect;
Work with Water Resource and Protection unit to inform the licensing processes.

South Africa: Top 10 Works with Lowest Risk Rating

Province	WSA Name	Works Name	Green Drop Score (2011)	Green Drop Score (2009)	% Progress	Risk Profile [CRR as % of CRR(Max)]	Cumulative Risk Rating (CRR)	Rank
MP	Mbombela	NELSPRUIT	0.0%	0.0%	0.0%	0.0%	0	825
LP	Vhembe District municipality	Nancefield WWTW	0.0%	0.0%	0.0%	0.0%	0	826
LP	Greater Sekhukhune District Municipality	Nebo Ponds WWTW	0.0%	0.0%	0.0%	0.0%	0	827
LP	Capricorn District municipality	Malamulele WWTW	0.0%	0.0%	0.0%	0.0%	0	830
KZ	iLembe District municipality	Shakaskraal	98.5%	45.0%	118.9%	16.7%	3	2
WC	Bitou	Plettenberg Bay - Gansevallei	96.5%	79.0%	22.2%	21.7%	5	7
WC	Bitou	Kurland	96.1%	77.5%	24.0%	22.2%	4	9
KZ	UMgungundlovu District municipality	Coolair	88.6%	33.0%	168.5%	22.2%	4	44
KZ	uMhlathuze	Vulindlela	83.2%	72.0%	15.6%	22.2%	4	88
KZ	UMgungundlovu District municipality	Appelbosch Hospital	82.5%	11.0%	650.0%	22.2%	4	94

Best Risk Profiles

(Show footnote)

Risk is defined and calculated by the following formulae:

Cumulative Risk Rating (CRR) = A x B + C + D

where:
A = Design Capacity of plant which also represent the hydraulic loading onto the receiving water body
B = Operational flow exceeding-, on- and below capacity
C = Number of non-compliance trends in terms of effluent quality as discharged to the receiving water body
D = Compliance or non-compliance i.t.o. technical skills

A CRR value is calculated for each municipal wastewater treatment facility in South Africa, as provided in this Green Drop Report. Municipalities can consult the Department of Water Affairs to obtain the individual risk assessments for their plants. However, the various municipal CRR profiles are usually send to the respective Executive Mayors from the Minister’s office, to inform the political principles of the facilities that reside in high - and critical risk space.

A CRR%deviation is used throughout the Report to indicate that variance of a CRR value before it reaches its maximum CRR value. The higher the CRR%deviation value, the closer the CRR risk is to the maximum value it can obtain.

Example 1: a 95% CRR%deviation value means the plant has only 5% space remaining before the system will reach its maximum critical state (100%).

Example 2: a 25% CRR%deviation value means the plant holds a low and manageable risk position and is not close to the limits that define a critical state (90-100%).

South Africa: Top 10 Performers based on Green Drop Score

Province	WSA Name	Works Name	Green Drop Score (2011)	Green Drop Score (2009)	% Progress	Risk Profile [CRR as % of CRR(Max)]	Cumulative Risk Rating (CRR)	Rank
KZ	eThekwini Municipality Metropolitan	Phoenix	99.4%	92.0%	8.0%	39.3%	11	1
KZ	iLembe District municipality	Shakaskraal	98.5%	45.0%	118.9%	16.7%	3	2
KZ	iLembe District municipality	Frasers	97.6%	52.0%	87.7%	47.8%	11	3
NW	Tlokwe City Council	Tlokwe	97.0%	78.0%	24.4%	35.7%	10	4
NW	Tlokwe City Council	Tlokwe	97.0%	78.0%	24.4%	35.7%	10	5
WC	City of Cape Town Metropolitan	Macassar (Strand)	96.8%	90.0%	7.6%	54.5%	18	6
WC	Bitou	Plettenberg Bay - Gansevallei	96.5%	79.0%	22.2%	21.7%	5	7
WC	City of Cape Town Metropolitan	Wildevoelvlei	96.3%	76.0%	26.7%	47.8%	11	8
WC	Bitou	Kurland	96.1%	77.5%	24.0%	22.2%	4	9
KZ	eThekwini Municipality Metropolitan	Central	96.0%	90.0%	6.7%	52.6%	20	10

Top Performers

(Show footnote)

Monitoring rectification processes (which will include planning initiatives, technology choices, MG applications, etc);
Gauge GDS and RPMS activity;
Work with low performing municipalities to identify key areas of focus for turnaround and to perform proper performance audits;
Monitoring Service Level Agreements vs. Actual Service Delivery/performance by service providers;
Allow for the Municipal Cross Pollination programme to take effect;
Work with Water Resource and Protection unit to inform the licensing processes.

South Africa: Top 10 Improving Works based on Green Drop Score

Province	WSA Name	Works Name	Green Drop Score (2011)	Green Drop Score (2009)	% Progress	Risk Profile [CRR as % of CRR(Max)]	Cumulative Risk Rating (CRR)	Rank
WC	Mossel Bay	Herbertsdale	49.3%	1.0%	4,830.0%	66.7%	12	377
NC	Renosterberg	Petrusville	32.1%	1.0%	3,110.0%	61.1%	11	500
NC	Renosterberg	Philipstown	30.6%	1.0%	2,960.0%	66.7%	12	511
WC	Mossel Bay	Ruiterbos	77.4%	3.0%	2,480.0%	27.8%	5	155
KZ	Umkhanyakude District municipality	St Lucia ponds	23.8%	1.0%	2,280.0%	88.9%	16	571
KZ	Umkhanyakude District municipality	Ingwavuma Hospital	23.4%	1.0%	2,240.0%	100.0%	18	578
KZ	Umkhanyakude District municipality	Hlabisa Hospital	23.4%	1.0%	2,240.0%	72.2%	13	579
WC	Cederberg	Citrusdal	66.9%	3.0%	2,130.0%	38.9%	11	235
WC	Cederberg	Lambert's Bay	66.2%	3.0%	2,106.7%	38.9%	11	242
WC	Cederberg	Clanwilliam	65.3%	3.0%	2,076.7%	47.2%	13	250

Top Improvers

(Show footnote)

Top improvers are based on the Dreen Drop Score achieved in 2011 as percentage of the Previously recorded Greed Drop Score....

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