Avon Cowbridge

EA name: AVON COWBRIDGE
Environment Agency sampling point SW-Z1012601 · 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
1 Mar 2024, 12:412.7 years ago · time as the Environment Agency records it (UK clock time; the source gives no time zone). Not sampled since, as far as the archive shows: the Environment Agency was asked up to 25 Oct 2026 and had nothing newer.
Samples banked
6 since 11 Oct 2023 Imported periods: 1 Oct 2023 – 25 Oct 2026. Samples outside them are not shown here.
Latest sample
River / running surface water Environmental monitoring statutory (EU directives)
Where
National Grid 394328, 186298As published, to the nearest 1 m. Open in a map
River, by its own name
Avon
River, by the map
River AvonPlaced on the river its name gives, 10 m from the line.
Next gauge downstream
Great Somerford On the River Avon · 6.2 km along the river
Nearest gauge upstream
Crabb Mill On the Woodbridge Brook · 0.8 km along the riverSt Johns Weir On the Sherston Avon · 1.8 km along the riverBrokenborough On the Tetbury Avon · 6.4 km along the river
Why it was sampled
Environmental monitoring statutory (EU directives) (6 samples)

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

97.2%

Sampled 1 Mar 2024, 2.7 years ago · 6 results banked

80859095100%202420252026no sample published after Mar 202411 Oct 2023, 12:39: 83.7%1 Nov 2023, 10:28: 91.4%6 Dec 2023, 09:30: 96.7%10 Jan 2024, 09:58: 99%1 Feb 2024, 10:11: 97.1%1 Mar 2024, 12:41: 97.2%
Every result (6)
SampledResult as publishedReads as
1 Mar 2024, 12:4197.2 97.2%
1 Feb 2024, 10:1197.1 97.1%
10 Jan 2024, 09:5899 99%
6 Dec 2023, 09:3096.7 96.7%
1 Nov 2023, 10:2891.4 91.4%
11 Oct 2023, 12:3983.7 83.7%

Dissolved oxygen

as O2 · code 9924 · mg/l

11.5 mg/l

Sampled 1 Mar 2024, 2.7 years ago · 6 results banked

8101214mg/l202420252026no sample published after Mar 202411 Oct 2023, 12:39: 8.55 mg/l1 Nov 2023, 10:28: 9.92 mg/l6 Dec 2023, 09:30: 11.5 mg/l10 Jan 2024, 09:58: 12.7 mg/l1 Feb 2024, 10:11: 11.3 mg/l1 Mar 2024, 12:41: 11.5 mg/l
Every result (6)
SampledResult as publishedReads as
1 Mar 2024, 12:4111.5 11.5 mg/l
1 Feb 2024, 10:1111.3 11.3 mg/l
10 Jan 2024, 09:5812.7 12.7 mg/l
6 Dec 2023, 09:3011.5 11.5 mg/l
1 Nov 2023, 10:289.92 9.92 mg/l
11 Oct 2023, 12:398.55 8.55 mg/l

Water temperature

code 0076 · °C

8.1 °C

Sampled 1 Mar 2024, 2.7 years ago · 6 results banked

2.557.51012.515°C202420252026no sample published after Mar 202411 Oct 2023, 12:39: 14.3 °C1 Nov 2023, 10:28: 11.6 °C6 Dec 2023, 09:30: 7.8 °C10 Jan 2024, 09:58: 4.9 °C1 Feb 2024, 10:11: 8.5 °C1 Mar 2024, 12:41: 8.1 °C
Every result (6)
SampledResult as publishedReads as
1 Mar 2024, 12:418.1 8.1 °C
1 Feb 2024, 10:118.5 8.5 °C
10 Jan 2024, 09:584.9 4.9 °C
6 Dec 2023, 09:307.8 7.8 °C
1 Nov 2023, 10:2811.6 11.6 °C
11 Oct 2023, 12:3914.3 14.3 °C

pH

code 0061

7.98

Sampled 1 Mar 2024, 2.7 years ago · 6 results banked

7.67.888.2202420252026no sample published after Mar 202411 Oct 2023, 12:39: 7.771 Nov 2023, 10:28: 7.846 Dec 2023, 09:30: 7.9910 Jan 2024, 09:58: 8.171 Feb 2024, 10:11: 8.121 Mar 2024, 12:41: 7.98
Every result (6)
SampledResult as publishedReads as
1 Mar 2024, 12:417.98 7.98
1 Feb 2024, 10:118.12 8.12
10 Jan 2024, 09:588.17 8.17
6 Dec 2023, 09:307.99 7.99
1 Nov 2023, 10:287.84 7.84
11 Oct 2023, 12:397.77 7.77

Ammonia

ammoniacal nitrogen as N · code 0111 · mg/l

0.075 mg/l

Sampled 1 Mar 2024, 2.7 years ago · 6 results banked

00.050.10.150.2mg/l202420252026no sample published after Mar 202411 Oct 2023, 12:39: 0.18 mg/l1 Nov 2023, 10:28: 0.069 mg/l6 Dec 2023, 09:30: 0.064 mg/l10 Jan 2024, 09:58: 0.05 mg/l1 Feb 2024, 10:11: 0.048 mg/l1 Mar 2024, 12:41: 0.075 mg/l
Every result (6)
SampledResult as publishedReads as
1 Mar 2024, 12:410.075 0.075 mg/l
1 Feb 2024, 10:110.048 0.048 mg/l
10 Jan 2024, 09:580.05 0.05 mg/l
6 Dec 2023, 09:300.064 0.064 mg/l
1 Nov 2023, 10:280.069 0.069 mg/l
11 Oct 2023, 12:390.18 0.18 mg/l

Nitrate

as nitrogen (N) · code 0117 · mg/l

5.08 mg/l

Sampled 1 Mar 2024, 2.7 years ago · 6 results banked

55.566.57mg/l202420252026no sample published after Mar 202411 Oct 2023, 12:39: 6.93 mg/l1 Nov 2023, 10:28: 5.68 mg/l6 Dec 2023, 09:30: 5.28 mg/l10 Jan 2024, 09:58: 6.98 mg/l1 Feb 2024, 10:11: 6.89 mg/l1 Mar 2024, 12:41: 5.08 mg/l
Every result (6)
SampledResult as publishedReads as
1 Mar 2024, 12:415.08 5.08 mg/l
1 Feb 2024, 10:116.89 6.89 mg/l
10 Jan 2024, 09:586.98 6.98 mg/l
6 Dec 2023, 09:305.28 5.28 mg/l
1 Nov 2023, 10:285.68 5.68 mg/l
11 Oct 2023, 12:396.93 6.93 mg/l

Phosphate

orthophosphate, reactive, as P · code 0180 · mg/l

0.055 mg/l

Sampled 1 Mar 2024, 2.7 years ago · 6 results banked

0.040.060.080.10.12mg/l202420252026no sample published after Mar 202411 Oct 2023, 12:39: 0.12 mg/l1 Nov 2023, 10:28: 0.097 mg/l6 Dec 2023, 09:30: 0.076 mg/l10 Jan 2024, 09:58: 0.05 mg/l1 Feb 2024, 10:11: 0.054 mg/l1 Mar 2024, 12:41: 0.055 mg/l
Every result (6)
SampledResult as publishedReads as
1 Mar 2024, 12:410.055 0.055 mg/l
1 Feb 2024, 10:110.054 0.054 mg/l
10 Jan 2024, 09:580.05 0.05 mg/l
6 Dec 2023, 09:300.076 0.076 mg/l
1 Nov 2023, 10:280.097 0.097 mg/l
11 Oct 2023, 12:390.12 0.12 mg/l

Conductivity

at 25 °C · code 0077 · µS/cm

550 µS/cm

Sampled 1 Mar 2024, 2.7 years ago · 6 results banked

550600650700µS/cm202420252026no sample published after Mar 202411 Oct 2023, 12:39: 674 µS/cm1 Nov 2023, 10:28: 570 µS/cm6 Dec 2023, 09:30: 550 µS/cm10 Jan 2024, 09:58: 616 µS/cm1 Feb 2024, 10:11: 610 µS/cm1 Mar 2024, 12:41: 550 µS/cm
Every result (6)
SampledResult as publishedReads as
1 Mar 2024, 12:41550 550 µS/cm
1 Feb 2024, 10:11610 610 µS/cm
10 Jan 2024, 09:58616 616 µS/cm
6 Dec 2023, 09:30550 550 µS/cm
1 Nov 2023, 10:28570 570 µS/cm
11 Oct 2023, 12:39674 674 µS/cm

Everything measured here

12 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 12 rows
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 River water 6 Oct 2023 – Mar 2024 97.2% 1 Mar 2024
Oxygen, Dissolved as O2 9924 River water 6 Oct 2023 – Mar 2024 11.5 mg/l 1 Mar 2024
Temperature of Water 0076 River water 6 Oct 2023 – Mar 2024 8.1 °C 1 Mar 2024
pH 0061 River water 6 Oct 2023 – Mar 2024 7.98 1 Mar 2024
Ammoniacal Nitrogen as N 0111 River water 6 Oct 2023 – Mar 2024 0.075 mg/l 1 Mar 2024
Nitrate as N 0117 River water 6 Oct 2023 – Mar 2024 5.08 mg/l 1 Mar 2024
Orthophosphate, reactive as P 0180 River water 6 Oct 2023 – Mar 2024 0.055 mg/l 1 Mar 2024
Conductivity at 25 C 0077 River water 6 Oct 2023 – Mar 2024 550 µS/cm 1 Mar 2024
Alkalinity to pH 4.5 as CaCO3 0162 River water 6 Oct 2023 – Mar 2024 230 mg/l 1 Mar 2024
Ammonia un-ionised as N 0119 River water 6 Oct 2023 – Mar 2024 0.00114 mg/l 1 Mar 2024
Nitrite as N 0118 River water 6 Oct 2023 – Mar 2024 0.016 mg/l 1 Mar 2024
Nitrogen, Total Oxidised as N 0116 River water 6 Oct 2023 – Mar 2024 5.1 mg/l 1 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.