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Provincial Green Drop Score   

Provincial Green Drop Score
(Show footnote)
Provincial performance profiles are the summation of the respective municipal performances. Each Province has different dynamics with municipal participants that perform exceptionally well, on average, unsatisfactory or very poorly.

South Africa: Comparative Analysis: Green Drop Scores
ProvinceNumber of WorksProvincial Green Drop ScoreRisk Profile [CRR as % of CRR(Max)]Average Green Drop ScoreGreen Drops Awarded% Systems that achieved >50%Position on Performance log
WC 155 83.1% 62.0%   65.0%   19 75.0% 1
KZ 143 82.0% 55.0%   61.0%   11 66.0% 2
GT 56 78.8% 57.0%   68.0%   5 68.0% 3
EC 123 67.2% 78.0%   33.0%   3 26.0% 4
MP 76 56.0% 73.0%   42.0%   1 41.0% 5
NW 35 50.0% 76.0%   29.0%   1 17.0% 6
FS 95 31.5% 83.0%   24.0%   0 12.0% 7
LP 67 24.0% 79.0%   24.0%   0 15.0% 8
NC 71 23.0% 76.0%   26.0%   0 13.0% 9
SA Total821   40  

Comparative Analysis of Provincial Performance
(Show footnote)
Provincial performance profiles are the summation of the respective municipal performances. Each Province has different dynamics with municipal participants that perform exceptionally well, on average, unsatisfactory or very poorly. The key performance indicators are compared for benchmarking and self assessment purposes.

From the above analysis, it can be seen that Western Cape, followed by Kwa-Zulu Natal and Gauteng are producing the high performing wastewater systems. Eastern Cape, followed by Free State, Northern Cape and Limpopo are producing the bulk of systems that are in critical and poor performing positions.

South Africa: Green Drop Comparative Analysis
Performance Category 2009 2010 Performance Trend
Number of Municipalities Assessed 98 156
Number of Wastewater Systems Assessed 444 821 Trend
Average Green Drop Score 37% 45% Trend
Number of Green Drops ≥50% 216
Number of Green Drops <50% 228
Number of Green Drop Awards 33
Average Site Inspection Score N/A 51.4% N/A
Provincial Green Drop Score N/A 71% N/A
N/A = Not Applied,   improvement = improvement,   digress = digress,   no change = no change

Green Drop Comparative Analysis
(Show footnote)
Analysis of the 2020/11 Green Drop assessments and site inspection results indicate that municipal wastewater service performance vary from ‘excellent’ to ‘unacceptable’.

A total of 156 municipalities and 821 wastewater systems were assessed in 2010, compared to 98 municipalities and 444 systems in 2009. The marked improvement in submission of performance portfolios by municipalities affirms the commitment by municipal management to raise their service standard and performance. The incentive-based regulatory approach seems to have succeeded to raise the overall awareness and to act as positive stimulus for gradual and sustainable improvement across the country. This is evident when comparing the 2009 average Green Drop score of 37% to the current improved status of 45%.

Analysis of the Green Drop results indicate a fairly good National Green drop Score of 71%. However, this value might be skewed as a few excellent Provincial Scores would balance out the lower Provincial performers.

A negative trend is observed when comparing the number of Green Drop scores >50% in 2009 (49%) decreased proportionally to 44%. This trend can possibly be explained by considering that 377 ‘first time’ systems were assessed and many of these achieved low Green Drop scores, very similar to the 2009 type trends. The encouraging aspect of this result is that a verified baseline have been established against which continued performance can be gauged and measured.

The excellent performers increased from 33 Green Drop awards in 2009 to 40 in 2010/11, with Western Cape (19x) and KZN (11x) producing the highest number of Green Drop awards. Readers must be mindful that Green Drop requirements become more stringent (and detailed) with every assessment cycle. Hence, the 36 systems that achieved Green Drop status are truly ‘excellent’. The Green Drop philosophy does not chase numbers as targets, but quality and excellence ....

CRR %Deviation from CRR max   
Score Chart
< 50%: Low risk    50 - <70%: Medium risk    70 - <90%: High risk    90 - <100%: Critical risk    

CRR %Deviation from CRR max
(Show footnote)
The movement of risk in the following profile is relatively neutral and indicate that no drastic movement is taking place as a national average. The overall picture is one of ‘stability’ whereby it seems that the country as a whole has managed to contain the risk, with slight movement to a higher risk position, as can be seen by the increase in plants in the critical risk (137) and decrease in plants in the low risks (138) positions.

Overall, the risk trend is neutral to negative, particularly when considering that 58 plants left the ‘low risk’ landscape to move to higher risk positions. The Regulator regards this trend with concern and will place municipalities with increased CRR trends under regulatory surveillance.

South Africa: Cumulative Risk Comparative Analysis
Performance Category: Risk-based indicators 2009 2010 Performance Trend
Highest CRR 29 32 Trend
Average CRR 13.3 13.6 Trend
Lowest CRR 4 3 Trend
Average Design Rating (A) 1.4 1.4 Trend
Average Capacity Exceedance Rating (B) 3.7 4.1 Trend
Average Effluent Failure Rating (C) 5.7 5.7 Trend
Average Technical Skills Rating (D) 2.4 2.6 Trend
Average Risk Profile 66.8% 69.2% Trend
N/A = Not Applied,   digress = digress,   improvement = improvement,   no change = no change

Cumulative Risk Comparative Analysis
(Show footnote)
From the above table, both positive and negative observations can be derived. The positive picture is that the average risk position is maintained at 13.6 CRR, whilst the lowest CRR position was improved upon by taken on 1 CRR unit lower position (3.0). Also, no digress can be observed in terms of decreased effluent quality and design capacities of plants for the country as a whole.

However, the highest CRR position was occupied by CRR 29 (2009) has moved to CRR 32 which is a higher risk position. Most importantly is that the average %deviation from the maximum CRR has increased from 66.8 to 69.2%. This might be a marginal increase, but indicates that plants continue (on average) to move into higher risk space.

Although the national picture looks stable with slight negative leaning, it is impressed upon the municipalities with digressing risk profiles to address those situations. These municipal treatment plants are clearly identified in the various Chapters under “Regulatory Impression” and marked with CRR↑ for each individual plant. CRR values marked in red and orange means that those treatment plants are in high- and critical risk positions. Unless those plants are not turning around performance, the above table will not show a positive risk profile for the country, and the health of the receiving environment will remain under threat.

Green Drop Performance Categories   
Score Chart
< 30%: Critical state    30 - <50%: Very poor performance    50 - <80%: Average performance    80 - <90%: Good status    90 - 100%: Excellent situation    

Green Drop Performance Categories
(Show footnote)
The Green Drop Results chart provides a snapshot view of the number of plants (and %) in each performance category. Ideally, the South African public would want to see that the majority of wastewater systems reside in the blue, green and yellow sections in future. Currently, only 44% of all systems occupy this space. As the Green Drop Certification programme and regulatory pressure continue, it is likely that more and more systems will move into the higher performance categories.

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