DWI Freedom of Information/ Environmental Information releases starting January 2025

A collection of DWI FOI/EIR releases where information has been partially or fully disclosed.

2025

EIR2025/25661 Tier 3 PFOA pollution sites

11 December 2025 EIR release

PDF, 182KB, 3 Pages

EIR2025/25220 Water quality in the Thames Water catchment area with further details to cover Croydon

2 December 2025 EIR release

PDF, 197KB, 4 Pages

EIR2025/23450 PFAS contamination in Baldock’s drinking water

25 November 2025 EIR release

PDF, 492KB, 5 Pages

EIR2025/23451 Drinking water at Brockworth, Gloucestershire

17 November 2025 EIR release

PDF, 274KB, 4 Pages

EIR2025/22366 Drinking Water Notices in England and Wales (2020-2025)

3 November 2025 EIR release

PDF, 175KB, 3 Pages

• Attachment EIR2025_22366-Annex-C.csv CSV, 411KB
  
  

EIR2025/19244 Drinking water PFAS test results

03 October 2025 EIR release

PDF, 202KB, 4 Pages

• Attachment PFAS tier 2 treated.xlsx Excel 67KB
• Attachment PFAS tier 3 raw.xlsx Excel 24KB
  
  

EIR2025/19145 Risk assessment of factors affecting water supply quality on the Isle of Wight

30 September 2025 EIR release

PDF, 192KB, 2 Pages

• Attachment Annex C – Isle_of_Wight_PFAS_RAR_redacted.xlsx Excel, 34KB
  
  

FOI2025/17620 Customer Service performance levels

3 September 2025 FOI release

PDF, 189KB, 3 Pages

EIR2025/16956 Cornwall Council’sRegulation 14(1) & (2) & Schedule 4 statutory returns since 2020

29 August 2025 EIR release

PDF, 192KB, 3 Pages

• Attachment Annex C Cornwall Council 2020-2024_redacted.xlsx Excel 16.7MB
  
  

EIR2025/16731 Major water supply interruption events

21 August 2025 EIR release

PDF, 187KB, 3 Pages

EIR2025/15197 PFAS information (Table 35) in 2024 Report of the Chief Inspector

24 July 2025 EIR release

PDF, 302KB, 3 Pages

EIR2025/14322 Water Quality, contaminants, sources of aluminium and health risk assessments

16 July 2025 EIR release

PDF, 210KB, 5 Pages

EIR2025/11957 Water contamination event January 2024 relating to Marleigh Housing Development

23 June 2025 EIR release

PDF, 90KB

• Attachment Annex C EAL IWN 2024-9486 Newmarket DNU Excel, 327KB
  
  

EIR2025/12941 Research project commissioned by DWI on TFA

19 June 2025 EIR release

PDF, 82KB

EIR2025/10747 Drinking water costs and chemicals

29 May 2025 EIR release

PDF, 87KB

EIR2025/07827 Water Analysis in the Great Yarmouth area

23 April 2025 EIR release

PDF, 184KB

EIR2025/05104 PFOS and PFOA sample date from untreated water 2023

25 March 2025 EIR release

PDF, 203KB

• Attachment Annex C 2023 Raw PFOS & PFOA.xlsx Excel, 494KB
  
  
  

EIR2025/04090 Annual report from Affinity Water and an audit strategy, regarding the notice ref: AFW-2023-00010

11 March 2025 EIR release

PDF, 89KB

Royal Oak PFAS reports and follow up records EIR 2025/04326

10 March 2025 EIR release

PDF, 89KB

• Attachment PFAS RA extraction from database.pdf PDF, 24KB
• Attachment UU_Annual_Return_01_25_Redacted.pdf PDF, 117KB
• Attachment Royal Oak PFAS Audit strategy December 24 FINAL_Redacted.pdf PDF, 200KB
  
  
  

EIR2025/03395 Mercury in UV Lamps used within Potable and Wastewater Treatments in the UK

5 March 2025 EIR release

PDF, 86KB

EIR2025/02774 Data on PFAS and water quality at the Blackford Public Water Source from Jan 2019 to May 2021

17 February 2025 EIR release

PDF, 82KB

• Attachment WQdataEIR2025_02774.xlsx Excel 141KB
  
  
  
  

EIR 2025/00108 Yorkshire Water and the tests for clean drinking water

21 January 2025 EIR release

PDF, 88KB

• Attachment Annex A AFW_Annual_Return_2023-redacted.pdf PDF, 848KB
• Attachment Annex B AFW_Annual_Return_2024_redacted.pdf PDF, 129KB
• Attachment Annex C Audit_strategy_AFW2023-00010_redacted.pdf PDF, 78KB
  

FOI2025/00359 Pay settlements for 23/24 and 24/25

10 January 2025 FOI Release

PDF, 81KB