Drinking Water Quality
Drinking water quality (11.58 MB)Jan 2018 – Dec 20192018-19 Link (https://www.yorkshirewater.com/media/1806/yorkshire-water-our-performance-at-a-glance-july-2019.pdf) Target; 100%* Actual; 99.962%
2019-20 Link (https://www.yorkshirewater.com/media/2579/our-performance-at-a-glance.pdf) Target; 100%* Actual; 99.949%
Outcome; We provide you with water that is clean and safe to drink
Description; This measures the quality of our water at the customers’ taps. We take water samples based on the sampling programme monitored by the Drinking Water Inspectorate (DWI), and the results are used to determine the percentage of samples that are at or meet the required standards.
About the data
A full breakdown of the drinking water quality data that supports our 18/19 Annual performance report. Water quality samples are reported against calendar year
(e.g APR 18/19 is Jan 18-Dec 18)
* 99.960% (Years 1 and 2) and 100% (Years 3-5) reported to 3 decimal places. More information relating to the 2019/20 performance commitment can be found here (https://www.yorkshirewater.com/media/2584/29938_yw_annual_performance_report_2020_web.pdf) on page 62.
- Significant drinking water events which required corrective action (3.20 kB)Jan – Dec 2018
Link (https://www.yorkshirewater.com/media/1806/yorkshire-water-our-performance-at-a-glance-july-2019.pdf) Target; 6 Actual; 5
Outcome; We provide you with water that is clean and safe to drink
Description; 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.
About the data
Rows with a resulting 'Yes' against it within the column 'Event with Corrective action' signify drinking water events which require corrective action or there has been an issue that was notifiable.
- Drinking water contacts (1.52 MB)Apr 2018 – Mar 2019
2018-19 Link (https://www.yorkshirewater.com/media/1806/yorkshire-water-our-performance-at-a-glance-july-2019.pdf) Target; Less than 6108 Actual; 7964
2019-20 Link (https://www.yorkshirewater.com/media/1806/yorkshire-water-our-performance-at-a-glance-july-2019.pdf) Target; Less than 6108 Actual; 6368
Outcome; We provide you with water that is clean and safe to drink
Description; 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.
About the data
14207 rows of contact data displaying contact type, reason for contact, normalised xy coordinates and Postal Sector.
- Water quality stability and reliability factor (3.76 kB)Jan – Dec 2018
Link (https://www.yorkshirewater.com/media/1806/yorkshire-water-our-performance-at-a-glance-july-2019.pdf) Target; Stable Actual; Stable
Outcome; We provide you with water that is clean and safe to drink
Description; 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.
About the data
More information regarding this performance commitment can be found here (https://www.yorkshirewater.com/media/1548/yorkshire-water-annual-performance-report-apr-2018-2019.pdf)on page 216 and on rows 1-6 of page 214 for the data tables to which the data refers to.
Technical details specific to reference bandings
Reference and Upper Reference refer to the bandings that determine whether a performance commitment is improving, stable or deteriorating, with an overall assessment taken by way of a calculation of the sub-measures (rows 1-6 page 214 as detailed above). The first assessment is the overall status of the main S&R measure as either; Improving, Stable or Deteriorating. This assessment is reported annually with confirmation of the end of AMP position made in year four based on the year five forecast outturn position. Sub-measures will be judged as either Stable, Improving or Deteriorating depending on their position in relation to the reference levels set at PR14 and confirmed in Ofwats ‘FD[final determination] Outcome and ODI[outcome delivery incentives] base dataset’. The number of sub-measures’ categorisation will then be aggregated to confirm the overall assessment for the overall S&R measure.