River Stour downstream of Gillingham sewage treatment works

EA name: RIVER STOUR D/S GILLINGHAM STW (also listed as “RIVER STOUR DOWNSTREAM GILLINGHAM STW”)
Environment Agency sampling point SW-50310187 · Freshwater - rivers · listed as open (“open” does not mean it is sampled now)

These are samples taken on a date, not live readings of the river. Results reach the Environment Agency's archive days to months after the sample is taken, so the newest here may be weeks or months old. FloodRadar does not grade them.

Where and when

Last sampled
20 Aug 2026, 11:3142 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
33 since 2 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
Latest sample
River / running surface water Monitoring (national agency policy)
Where
National Grid 380318, 125753As published, to the nearest 1 m. Open in a map
River, by its own name
Stour
River, by the map
River StourPlaced on the river its name gives, 5 m from the line.
Next gauge downstream
Hammoon On the River Stour · 33 km along the river
Nearest gauge upstream
Gillingham Le Neubourg Way On the River Stour · 1.3 km along the riverColesbrook On the Shreen Water · 3.3 km along the river
Why it was sampled
Monitoring (national agency policy) (27 samples)
Environmental monitoring statutory (EU directives) (6 samples)

Main measurements, river water

pH

code 0061

8.2

Sampled 14 Mar 2024, 2.5 years ago · 6 results banked

7.67.888.2202420252026no sample published after Mar 20242 Oct 2023, 10:59: 7.9113 Nov 2023, 12:15: 7.686 Dec 2023, 13:40: 7.8230 Jan 2024, 10:56: 8.227 Feb 2024, 13:04: 8.1314 Mar 2024, 11:36: 8.2
Every result (6)
SampledResult as publishedReads as
14 Mar 2024, 11:368.2 8.2
27 Feb 2024, 13:048.13 8.13
30 Jan 2024, 10:568.2 8.2
6 Dec 2023, 13:407.82 7.82
13 Nov 2023, 12:157.68 7.68
2 Oct 2023, 10:597.91 7.91

Everything measured here

3 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.

Show all 3 rows
DeterminandMaterialResults First – lastLatest result
pH 0061 River water 6 Oct 2023 – Mar 2024 8.2 14 Mar 2024
Aluminium, Dissolved 6037 River water 33 Oct 2023 – Aug 2026 below 20 µg/l 20 Aug 2026
Iron, Dissolved 6460 River water 6 Oct 2023 – Mar 2024 54 µg/l 14 Mar 2024

FloodRadar does not grade these results: there is no overall score, and official river classifications are a separate dataset. A sample taken downstream of an overflow does not by itself show where anything in it came from. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels.

Water samples: Environment Agency Water Quality Archive, © Environment Agency and/or database right 2026, Open Government Licence v3.0.

Contains OS data © Crown copyright and database rights 2026.