Find the water report for the relevant postcode before comparing its numbers. Then read each row across: what was measured, in which unit, over which set of samples, and against which listed limit? A Liverpool example helps show why those details belong together.
Start with the returned zone
Use United Utilities' postcode lookup to select the applicable report. Keep the area the utility returns for that postcode; a familiar report title may refer to a different place. United Utilities' water-quality lookup
The public lookup for example postcode L3 8EW returned Liverpool City Centre, zone Z178, with a refresh timestamp of 9 October 2026. This is an example area report, not a sample from every Liverpool tap or your hotel room. Save the zone name with the result so that a later comparison refers to the same report. Original detailed example
Keep units and result columns together
The displayed columns distinguish minimum, average, maximum, units, regulatory limit, sample count and percentage failed. An average describes the collection of results; a maximum identifies its highest reported value. Keep the average and maximum in separate columns when you take notes. The utility's actual display labels
In that dated example, iron averages 14.1 µg Fe/l, reaches a maximum of 27.0 µg Fe/l and has a listed limit of 200 µg Fe/l across 31 samples. The E. coli row reports 102 samples with zero in its minimum, average and maximum columns, expressed as number per 100 ml. The dated Z178 rows
A metal concentration and a bacterial count use different units, so comparing only their numerical size is misleading. Also, different parameters have different sample counts: the report is not one uniform experiment in which every row was measured equally often. Preserve the less-than sign wherever it appears rather than rounding it into a claimed zero.
Where a regulatory-limit field is blank, leave it blank rather than reading it as zero or unlimited permission. The absence of a number in that field is not a substitute for the relevant explanation. Original fields
Read the sampling point and date
United Utilities describes monitoring water leaving treatment works and taking samples at treatment works, service reservoirs and customer properties. That is a monitoring programme with several settings, not a promise that every home was tested. Ask which setting a result represents if the answer matters to your question. How the utility tests water
Its EIR response dated 24 March 2025 describes a rolling previous twelve months, updated weekly. The same response says pesticide monitoring is undertaken at treatment works rather than customer properties. These statements explain the report's method, not the condition of a particular building. Dated utility explanation
The current example does not return the exact beginning and end of that sampling period. Its refresh timestamp therefore cannot be relabeled as the date every sample was taken. If you need the exact period, ask the utility to identify it rather than reconstructing dates from an update label.
Keep a usable record
For a follow-up, retain the postcode, zone, parameter, unit, selected row and report date together. Say whether your question concerns a published summary or something happening at the property now. The supplier can then distinguish a report question from a concern at the address.
Our Liverpool city guide provides travel context. Retain the dates on utility figures. This area example cannot certify every Liverpool tap.
