River Thames at Magna Carta

Where and when

Last sampled

28 Aug 2026, 16:1158 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)

Samples banked

8 since 30 Jan 2026 Imported periods: 1 Oct 2023 – 25 Oct 2026. Samples outside them are not shown here.

Latest sample

River / running surface water Monitoring (national agency policy) · results completed 15 Oct 2026

Where

National Grid 500034, 172738As published, to the nearest 1 m. Open in a map

River, by its own name

Thames

River, by the map

River ThamesPlaced on the river its name gives, 33 m from the line.

Next gauge downstream

Bell Weir On the River Thames · 2.2 km along the river

Nearest gauge upstream

Old Windsor Lock On the River Thames · 2.5 km along the river

Why it was sampled

Monitoring (national agency policy) (8 samples)

Results here were completed a median of 60 days after the sample was taken (48 to 62 days, 3 samples).

Main measurements, river water

Everything measured here

153 determinands, each kept by its code, unit and sample material: results in different units or on different materials are never mixed. A “below” result is under the laboratory's detection limit, not zero.