River Gadder Oxborough Bridge

EA name: R.GADDER OXBOROUGH BRIDGE
Environment Agency sampling point AN-48M25 · 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
11 Sep 2026, 08:0020 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
6 since 20 Apr 2026 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
Latest sample
River / running surface water Environmental monitoring statutory (EU directives)
Where
National Grid 574500, 301300As published, to the nearest 100 m (so up to about 70 m out). Open in a map
River, by its own name
Gadder
River, by the map
River GadderPlaced on the river its name gives, 0 m from the line.
Next gauge downstream
Wissey Sluice On the River Wissey · 6.3 km along the river (the path rests on a repair to the map)
Why it was sampled
Environmental monitoring statutory (EU directives) (6 samples)

2 visits found no water to sample (recorded as “No flow”).

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

53.2%

Sampled 2 Jul 2026, 3 months ago · 4 results banked

406080100%20242025202620 Apr 2026, 13:28: 98.5%5 May 2026, 11:59: 97.7%12 Jun 2026, 12:32: 86.7%2 Jul 2026, 11:03: 53.2%
Every result (4)
SampledResult as publishedReads as
2 Jul 2026, 11:0353.2 53.2%
12 Jun 2026, 12:3286.7 86.7%
5 May 2026, 11:5997.7 97.7%
20 Apr 2026, 13:2898.5 98.5%

Dissolved oxygen

as O2 · code 9924 · mg/l

4.97 mg/l

Sampled 2 Jul 2026, 3 months ago · 4 results banked

4681012mg/l20242025202620 Apr 2026, 13:28: 10.7 mg/l5 May 2026, 11:59: 10.2 mg/l12 Jun 2026, 12:32: 8.63 mg/l2 Jul 2026, 11:03: 4.97 mg/l
Every result (4)
SampledResult as publishedReads as
2 Jul 2026, 11:034.97 4.97 mg/l
12 Jun 2026, 12:328.63 8.63 mg/l
5 May 2026, 11:5910.2 10.2 mg/l
20 Apr 2026, 13:2810.7 10.7 mg/l

Water temperature

code 0076 · °C

18.5 °C

Sampled 2 Jul 2026, 3 months ago · 4 results banked

101214161820°C20242025202620 Apr 2026, 13:28: 11.5 °C5 May 2026, 11:59: 13.1 °C12 Jun 2026, 12:32: 15.5 °C2 Jul 2026, 11:03: 18.5 °C
Every result (4)
SampledResult as publishedReads as
2 Jul 2026, 11:0318.5 18.5 °C
12 Jun 2026, 12:3215.5 15.5 °C
5 May 2026, 11:5913.1 13.1 °C
20 Apr 2026, 13:2811.5 11.5 °C

pH

code 0061

7.78

Sampled 2 Jul 2026, 3 months ago · 4 results banked

7.67.888.28.420242025202620 Apr 2026, 13:28: 8.265 May 2026, 11:59: 8.2112 Jun 2026, 12:32: 8.052 Jul 2026, 11:03: 7.78
Every result (4)
SampledResult as publishedReads as
2 Jul 2026, 11:037.78 7.78
12 Jun 2026, 12:328.05 8.05
5 May 2026, 11:598.21 8.21
20 Apr 2026, 13:288.26 8.26

Ammonia

ammoniacal nitrogen as N · code 0111 · mg/l

0.04 mg/l

Sampled 2 Jul 2026, 3 months ago · 4 results banked

0.030.0350.04mg/l20242025202620 Apr 2026, 13:28: below 0.03 mg/l (not detected above this)5 May 2026, 11:59: below 0.03 mg/l (not detected above this)12 Jun 2026, 12:32: below 0.03 mg/l (not detected above this)2 Jul 2026, 11:03: 0.04 mg/l
Every result (4)
SampledResult as publishedReads as
2 Jul 2026, 11:030.04 0.04 mg/l
12 Jun 2026, 12:32<0.03 below 0.03 mg/l (not detected above this)
5 May 2026, 11:59<0.03 below 0.03 mg/l (not detected above this)
20 Apr 2026, 13:28<0.03 below 0.03 mg/l (not detected above this)

Nitrate

as nitrogen (N) · code 0117 · mg/l

6.67 mg/l

Sampled 2 Jul 2026, 3 months ago · 4 results banked

678910mg/l20242025202620 Apr 2026, 13:28: 9.97 mg/l5 May 2026, 11:59: 9.56 mg/l12 Jun 2026, 12:32: 6.38 mg/l2 Jul 2026, 11:03: 6.67 mg/l
Every result (4)
SampledResult as publishedReads as
2 Jul 2026, 11:036.67 6.67 mg/l
12 Jun 2026, 12:326.38 6.38 mg/l
5 May 2026, 11:599.56 9.56 mg/l
20 Apr 2026, 13:289.97 9.97 mg/l

Phosphate

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

0.33 mg/l

Sampled 2 Jul 2026, 3 months ago · 4 results banked

00.10.20.30.4mg/l20242025202620 Apr 2026, 13:28: 0.035 mg/l5 May 2026, 11:59: 0.096 mg/l12 Jun 2026, 12:32: 0.1 mg/l2 Jul 2026, 11:03: 0.33 mg/l
Every result (4)
SampledResult as publishedReads as
2 Jul 2026, 11:030.33 0.33 mg/l
12 Jun 2026, 12:320.1 0.1 mg/l
5 May 2026, 11:590.096 0.096 mg/l
20 Apr 2026, 13:280.035 0.035 mg/l

Conductivity

at 25 °C · code 0077 · µS/cm

614 µS/cm

Sampled 2 Jul 2026, 3 months ago · 4 results banked

600620640660680µS/cm20242025202620 Apr 2026, 13:28: 668 µS/cm5 May 2026, 11:59: 667 µS/cm12 Jun 2026, 12:32: 607 µS/cm2 Jul 2026, 11:03: 614 µS/cm
Every result (4)
SampledResult as publishedReads as
2 Jul 2026, 11:03614 614 µS/cm
12 Jun 2026, 12:32607 607 µS/cm
5 May 2026, 11:59667 667 µS/cm
20 Apr 2026, 13:28668 668 µS/cm

Everything measured here

13 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 13 rows
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 River water 4 Apr 2026 – Jul 2026 53.2% 2 Jul 2026
Oxygen, Dissolved as O2 9924 River water 4 Apr 2026 – Jul 2026 4.97 mg/l 2 Jul 2026
Temperature of Water 0076 River water 4 Apr 2026 – Jul 2026 18.5 °C 2 Jul 2026
pH 0061 River water 4 Apr 2026 – Jul 2026 7.78 2 Jul 2026
Ammoniacal Nitrogen as N 0111 River water 4 Apr 2026 – Jul 2026 0.04 mg/l 2 Jul 2026
Nitrate as N 0117 River water 4 Apr 2026 – Jul 2026 6.67 mg/l 2 Jul 2026
Orthophosphate, reactive as P 0180 River water 4 Apr 2026 – Jul 2026 0.33 mg/l 2 Jul 2026
Conductivity at 25 C 0077 River water 4 Apr 2026 – Jul 2026 614 µS/cm 2 Jul 2026
Alkalinity to pH 4.5 as CaCO3 0162 River water 4 Apr 2026 – Jul 2026 220 mg/l 2 Jul 2026
Ammonia un-ionised as N 0119 River water 4 Apr 2026 – Jul 2026 0.00083 mg/l 2 Jul 2026
Nitrite as N 0118 River water 4 Apr 2026 – Jul 2026 0.03 mg/l 2 Jul 2026
Nitrogen, Total Oxidised as N 0116 River water 4 Apr 2026 – Jul 2026 6.7 mg/l 2 Jul 2026
No flow /No sample 7668 River water 2 Aug 2026 – Sep 2026 No flow/discharge at sampling point 11 Sep 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.