When you open a Leeds water report, start with the place the sample came from. Water sampled before blending and treatment answers a different question from water sampled at a customer's tap. Yorkshire Water publishes records of both, so finding a document with a Leeds connection is only the first step.
For a question about drinking water at an address, look for the matching supply-zone report and its sampling year. The examples below show how to tell those records apart.
Start with the report for your postcode
Yorkshire Water's response called PEIR 182, dated 13 January 2026, explains that supply-zone results come from customer taps. It directs readers to postcode reports. That makes the postcode a useful starting point for finding results relevant to a property.
Take the zone named Leeds LL Cross Green 2019. Its drinking-water report covers 1 January to 31 December 2023 and bears a June 2024 header. It records 180 E. coli samples with no failures and 180 total-coliform samples with one failure. The 2019 in the zone's name is a label, not the year those samples were taken.
The same distinction applies to Leeds LL Robin Hood 2019, which is a different zone. PEIR 182 describes the tests used to check Robin Hood against required water-quality standards. It reports no breaches of the limits for microbes so far in 2025, without giving the exact cutoff. That statement belongs to Robin Hood; it cannot be transferred to Cross Green or every Leeds address.
Neither these Cross Green results nor Robin Hood's summary establishes conditions in October 2026. For a current drinking-water question, use a postcode-matched report and read the actual collection period.
Understand what a raw-water record covers
PEIR 40, dated 7 May 2025, concerns Yorkshire Water's surface-water abstraction records: water collected before blending and treatment. It gives generalised locations while withholding exact sampling locations. These are different records from the customer-tap results above.
The regulator's chemical-monitoring programme includes PFAS, short for per- and polyfluoroalkyl substances. The Drinking Water Inspectorate explains this chemical family. For this PFAS programme, the Drinking Water Inspectorate counts sampling before the final treated-water sampling point as raw-water sampling, including some intermediate treatment stages. Its notice signed on 1 November 2024 names Leeds High Level and Leeds Low Level systems. Those names have not been matched to Cross Green or Robin Hood, and the notice provides no Leeds concentration table.
Separate a treatment route from a test result
A description of where water travels can explain a supply system without giving measurements from a customer's tap. Yorkshire Water's September 2022 drought-order document, for example, describes Eccup No 1 treating Washburn Valley reservoir water and Eccup No 2 treating River Ouse water collected at Moor Monkton.
Headingley received water from Eccup reservoir, which received both Washburn and Ouse water. Treated River Derwent grid water also supported Leeds demand. The document's graphs cover abstraction, reservoir storage and treated output. They are not customer-tap contaminant measurements, and this historical route does not identify a property's current blend.
The regional treatment-product list in PEIR 152, dated 19 November 2025, has a similar limit. Not every works uses every listed product; site-specific chemicals and levels were withheld. It cannot tell you the treatment recipe for an individual Leeds property.
Notes on the specialist records
Some questions remain unresolved in the PFAS records. PEIR 40 says raw data is held from 2021. PEIR 159, dated 5 December 2025, says raw monitoring began in 2022 and treated monitoring in 2023. These utility-wide start dates need clarification and are not verified Leeds sampling periods.
The 2025 disclosure archive lists separate raw and treated PFAS attachments. Those attachments could not be read for this research, leaving individual sample dates, concentrations and Leeds assignments unverified.
The 2026 disclosure log links to PEIR 182. Both logs are indexes of environmental information: their years and attachment labels do not establish sample dates, results or sampling points. Online publication dates for the cited records are also unverified. Keep document dates separate from the dates water was sampled, and read each result with its location, parameter and unit.
For broader visitor guidance, see our Leeds guide. If an official notice applies to the property, follow its issuer's instructions; our water-notice guide explains what to check.
