Bristol Avon downstream of Avoncliff Weir

EA name: BRISTOL AVON D/S AVONCLIFF WEIR (also listed as “D/S AVONCLIFF WEIR.”)
Environment Agency sampling point SW-Z1011503 · 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
17 Jul 2026, 08:223 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
13 since 2 Oct 2023 Imported periods: 1 Oct 2023 – 24 Oct 2026. Samples outside them are not shown here.
Latest sample
River / running surface water Monitoring (national agency policy) · results completed 30 Jul 2026
Where
National Grid 380437, 160027As published, to the nearest 1 m. Open in a map
River, by its own name
Bristol Avon
River, by the map
River AvonPlaced on a river whose name partly matches its own, 13 m from the line.
Next gauge downstream
Bathford On the River Avon · 9.9 km along the river
Nearest gauge upstream
Bradford on Avon On the River Avon · 1.2 km along the river
Why it was sampled
Monitoring (national agency policy) (11 samples)
Environmental monitoring statutory (EU directives) (2 samples)

Results here were completed a median of 13 days after the sample was taken (13 to 13 days, 1 samples).

Main measurements, river water

pH

code 0061

8.26

Sampled 17 Jul 2026, 3 months ago · 13 results banked

7.57.7588.258.58.752024202520262 Oct 2023, 11:02: 7.928 Jan 2024, 11:27: 7.9910 Apr 2024, 10:44: 8.2417 Jul 2024, 12:30: 7.9210 Oct 2024, 10:08: 7.6822 Jan 2025, 15:28: 8.1911 Apr 2025, 14:56: 8.5514 Jul 2025, 10:27: 7.999 Oct 2025, 14:48: 7.9714 Oct 2025, 08:36: 7.922 Jan 2026, 11:53: 7.924 Apr 2026, 12:59: 8.3317 Jul 2026, 08:22: 8.26
Every result (13)
SampledResult as publishedReads as
17 Jul 2026, 08:228.26 8.26
24 Apr 2026, 12:598.33 8.33
22 Jan 2026, 11:537.9 7.9
14 Oct 2025, 08:367.9 7.9
9 Oct 2025, 14:487.97 7.97
14 Jul 2025, 10:277.99 7.99
11 Apr 2025, 14:568.55 8.55
22 Jan 2025, 15:288.19 8.19
10 Oct 2024, 10:087.68 7.68
17 Jul 2024, 12:307.92 7.92
10 Apr 2024, 10:448.24 8.24
8 Jan 2024, 11:277.99 7.99
2 Oct 2023, 11:027.92 7.92

Everything measured here

5 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 5 rows
DeterminandMaterialResults First – lastLatest result
pH 0061 River water 13 Oct 2023 – Jul 2026 8.26 17 Jul 2026
Calcium, Dissolved 0239 River water 12 Oct 2023 – Jul 2026 110 mg/l 17 Jul 2026
Carbon, Organic, Dissolved as C :- {DOC} 0301 River water 12 Oct 2023 – Jul 2026 4.1 mg/l 17 Jul 2026
Iron, Dissolved 6460 River water 12 Oct 2023 – Jul 2026 below 30 µg/l 17 Jul 2026
Magnesium, Dissolved 0235 River water 12 Oct 2023 – Jul 2026 6.6 mg/l 17 Jul 2026

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.