| Reference | Request Details | Disclosure Status | Attachments |
|---|---|---|---|
| PEIR 1 | Information for complaints regarding water leaks from 2018 - 2025 on More Hall Lane and Sunny Bank Road in Sheffield | Partial Disclosure (Personal data) | PEIR 1.pdf |
| PEIR 2 | Data for Clifton Wetlands including the removal efficiency of different contaminants in constructed wetlands | Full Disclosure | |
| PEIR 3 | Expenditure in relation to taking over private sewers and waste treatment plants since the introduction of the government legislation | Full Disclosure | PEIR 3.pdf |
| PEIR 4 | Water Supply Zone report | Full Disclosure | PEIR 4.pdf |
| PEIR 5 |
CSO Discharge Figures for Ellerton Waste Water Treatment Works for 1st January 2024 – 31 January 2025 CSO Discharge Figures for Ellerton Weres Pond for 1st January 2024 – 31 January 2025 |
Full Disclosure | |
| PEIR 6 | CSO Discharge report for School Close Huby and Grey Close Sutton for December 2024 | Full Disclosure | |
| PEIR 7 | All start-stop times for EDM detected spills for all overflows for 2024 | Non-Disclosure | PEIR 7.pdf |
| PEIR 8 | Mean and maximum flow rates are from your treatment plant into the River Don from Aldwarke Sewage Treatment Works | Full Disclosure | |
| PEIR 9 | Abstraction Information for Lumley and Roundhill Reservoir for previous 7 years | Full Disclosure | |
| PEIR 10 | Chemicals used in the process of cleaning and producing Water | Full Disclosure | PEIR 10.pdf |
| PEIR 11 | Work schedules and inspections on the B6480 around the junction of Butts Lane High Bentham between 1 December 2023 and 10 June 2024. | Full Disclosure | PEIR 11.pdf |
| PEIR 12 | Information in relation to YW drainage network and highway gullies, Keyingham Sewage works and Keyingham Drain | Partial Disclosure (Information not held) | PEIR 12.pdf |
| PEIR 13 | Chemicals in drinking water | Full Disclosure | PEIR 13.pdf |
| PEIR 14 | Lead levels above 10 μg/L in samples over the last three years | Partial Disclosure (Personal data) | |
| PEIR 15 | Environment Agency’s National Flood Risk Assessment for Eastborough, Scarborough | Partial Disclosure (Personal data) | PEIR 15.pdf |
| PEIR 16 | Information on sludge activities | Partial Disclosure (Incomplete/Personal data) | PEIR 16.pdf |
| PEIR 17 | Environment Agency’s EDM records for Railway Street, Slingsby | Full Disclosure | PEIR 17.pdf |
| PEIR 18 | EDM data for start stop times of all CSO spills | Full Disclosure | |
| PEIR 19 | Information in relation to the MRO and Tools Framework | Non Disclosure (Out of Scope) | PEIR 19.pdf |
| PEIR 20 | Water volume/Flow telemetry information for Ryburn and Baitings Reservoir between 12:00am and 10:00am on 26/12/2015 | Partial Disclosure (Information not held) | PEIR 20.pdf |
| PEIR 21 | List of reports, investigations or case studies on Lindley Wood and Grimwith Reservoirs from 1995 to present. | Partial Disclosure (National Security/Personal Data) | PEIR 21.pdf |
| PEIR 22 | Internal Review of All start-stop times for EDM detected spills for all overflows for 2024 | Full Disclosure | PEIR 22.pdf |
| PEIR 23 | Flood sewer history for Cardigan Fields Kirkstall Road LS4 2DG | Non Disclosure (Out of Scope) | PEIR 23.pdf |
| PEIR 24 | Total number of complaints regarding Sewerage at Nafferton Mere in 2024 | Full Disclosure | PEIR 24.pdf |
| PEIR 25 | Record of profits and dividends paid to Shareholders dating back 10 years. Total amount invested in YW infrastructure within the last 10 years. Transparent reason for price increases from April 2025. | Partial Disclosure (Out of Scope) | PEIR 25.pdf |
| PEIR 26 | Total data centres supplied with water by YW and the annual usage of water. | Non Disclosure (Out of Scope) | PEIR 26.pdf |
| PEIR 27 | Sewage treatment and chemicals releasing to the storm outflow pipe on South Beach, Bridlington | Full Disclosure | PEIR 27.pdf |
| PEIR 28 | Internal Review for Water volume/Flow telemetry information for Ryburn and Baitings Reservoir | Non-Disclosure (Information not held) | PEIR 28.pdf |
| PEIR 29 | Use of public sewers for discharge of affluent water by Holmes Halls Processors from 2023 to present | Partial Disclosure (Information not held) | PEIR 29.pdf |
| PEIR 30 | List of live/outstanding section 104 and 185 bond agreements for non-adopted sites | Non Disclosure | PEIR 30.pdf |
| PEIR 31 | Sewer relining of existing foul and surface water sewer assets | Full Disclosure | PEIR 31.pdf |
| PEIR 32 | List of flooding incidents | Partial Disclosure (Information not held/Personal Data) | |
| PEIR 33 | Information for Harrogate South and Burley in Wharfedale sewage works | Full Disclosure | PEIR 33.pdf |
| PEIR 34 | Information in relation to YW drainage network and highway gullies, Keyingham Sewage works and Keyingham Drain | Partial Disclosure (Information not held) | |
| PEIR 35 | PFAS Monitoring and Risk Management | Partial Disclosure (Information not held/National Security) | PEIR 35.pdf |
| PEIR 36 | Site layout plan, complaints history and odour assessments for Barlby Wastewater Treatment Works | Non Disclosure (National Security/No data held) | PEIR 36.pdf |
| PEIR 37 | Water quality monitoring and contaminant exceedances within YW supply area | Full Disclosure | PEIR 37.pdf |
| PEIR 38 | Remuneration committee meeting minutes, transcripts and recordings | Non Disclosure | |
| PEIR 39 | Data for diazinon concentrations from samples collected in 2014-2024 | Partial Disclosure (National Security/No data held) | |
| PEIR 40 | PFAS measurements from surface water abstraction sites from 2000-2025 in the form of concentrations | Partial Disclosure (National Security) | |
| PEIR 41 | Internal Review for total data centres supplied with water by YW and the annual usage of water. | Non Disclosure (No data held) | PEIR 41.pdf |
| PEIR 42 | Information regarding old decommissioned asbestos water pipes | Partial Disclosure (No data held) | PEIR 42.pdf |
| PEIR 43 | Pollution events for the whole of Yorkshire. | Non Disclosure | PEIR 43.pdf |
| PEIR 44 | Discharge records for outlets and permits into the River Went | Full Disclosure | PEIR 44.pdf |
| PEIR 45 | Information on the three longest individual sewage discharges under YW | Non Disclosure | PEIR 45.pdf |
| PEIR 46 | Works regarding replacement of water mains in Seacroft Leeds | Full Disclosure | PEIR 46.pdf |
| PEIR 47 | Flow rate of the Rover Don in m3/s at or around the point of discharge from Aldwarke WWTP | Non Disclosure (No data held) | PEIR 47.pdf |
| PEIR 48 | List of Design Capacities for all your Sewage Treatment Works | Non Disclosure (No data held) | PEIR 48.pdf |
| PEIR 49 | Copy of the Effluent Discharge Register | Full Disclosure |