| 1 |
WA1 |
We provide you with water that is clean and safe to drink |
Drinking water quality |
This measures the quality of our water at the customers’ taps. We take water samples based on the DWI sampling programme, and the results are used to determine the percentage of samples that are at or above pre-defined standards. |
P41 |
% |
99.953 |
99.954 |
99.962 |
99.953 |
99.962 |
| 2 |
WA2 |
We provide you with water that is clean and safe to drink |
Significant drinking water events which require corrective action |
Any significant incident where the Drinking Water Inspectorate (DWI) has required us to take corrective action to maintain compliance or protect public health. Essentially, this refers to the number of times that the DWI feels that we haven’t dealt with a situation appropriately when we’ve had to notify customers that the quality of our water is not up to acceptable standards. |
P41 |
nr |
3 |
5 |
3 |
4 |
5 |
| 3 |
WA3 |
We provide you with water that is clean and safe to drink |
Drinking water contacts |
The number of times that customers contact us each year because of taste, odour or discolouration issues with our water, and perceived illness as a result of drinking our water. |
P41 |
nr |
10570 |
10007 |
9093 |
8100 |
7964 |
| 4 |
WA4 |
We provide you with water that is clean and safe to drink |
Water quality stability and reliability factor |
An overall assessment of the long-term stability and reliability for water quality. It’s based on a series of measures which include non-compliance of our water treatment works sites and reservoirs due to coliform bacteria, turbidity and the number of reactive equipment failures. |
P41 |
category |
Stable |
Stable |
Stable |
Stable |
Stable |
