Congres Yeo BLW B LK
EA name: CONGRES YEO BLW B LK
Environment Agency sampling point SW-E8100400 · 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 May 2026, 10:075 months 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 30 Sep 2026 and had nothing newer.
- Samples banked
- 23 since 19 Jun 2024 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 348690, 160778As published, to the nearest 1 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Congresbury YeoPlaced by position alone, on a line whose map name differs from its own, 7 m from the line.
- Next gauge downstream
- Iwood On the Congresbury Yeo · 5.2 km along the river
- Why it was sampled
- Monitoring (national agency policy) (23 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
83.6%
Sampled 1 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 10:07 | 83.6 | 83.6% |
| 15 Apr 2026, 10:29 | 92.7 | 92.7% |
| 24 Mar 2026, 14:05 | 96.9 | 96.9% |
| 25 Feb 2026, 14:59 | 103.9 | 103.9% |
| 26 Jan 2026, 13:43 | 99.4 | 99.4% |
| 12 Nov 2025, 09:42 | 86.1 | 86.1% |
| 7 Oct 2025, 14:14 | 86.4 | 86.4% |
| 4 Sep 2025, 09:34 | 88 | 88% |
| 5 Aug 2025, 11:46 | 85.2 | 85.2% |
| 18 Jul 2025, 10:25 | 81.2 | 81.2% |
| 19 Jun 2025, 12:47 | 81.5 | 81.5% |
| 6 May 2025, 10:14 | 82.1 | 82.1% |
| 10 Apr 2025, 10:30 | 89.1 | 89.1% |
| 11 Mar 2025, 13:37 | 93.4 | 93.4% |
| 5 Feb 2025, 09:45 | 98 | 98% |
| 22 Jan 2025, 11:55 | 94 | 94% |
| 6 Dec 2024, 13:20 | 89.3 | 89.3% |
| 19 Nov 2024, 10:53 | 85.7 | 85.7% |
| 17 Oct 2024, 13:11 | 88.8 | 88.8% |
| 16 Sep 2024, 11:27 | 89 | 89% |
| 20 Aug 2024, 11:02 | 91.8 | 91.8% |
| 23 Jul 2024, 11:24 | 88.5 | 88.5% |
| 19 Jun 2024, 14:34 | 89.4 | 89.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.73 mg/l
Sampled 1 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 10:07 | 8.73 | 8.73 mg/l |
| 15 Apr 2026, 10:29 | 9.88 | 9.88 mg/l |
| 24 Mar 2026, 14:05 | 10.5 | 10.5 mg/l |
| 25 Feb 2026, 14:59 | 11.5 | 11.5 mg/l |
| 26 Jan 2026, 13:43 | 12 | 12 mg/l |
| 12 Nov 2025, 09:42 | 9.03 | 9.03 mg/l |
| 7 Oct 2025, 14:14 | 8.92 | 8.92 mg/l |
| 4 Sep 2025, 09:34 | 8.74 | 8.74 mg/l |
| 5 Aug 2025, 11:46 | 8.06 | 8.06 mg/l |
| 18 Jul 2025, 10:25 | 7.41 | 7.41 mg/l |
| 19 Jun 2025, 12:47 | 7.41 | 7.41 mg/l |
| 6 May 2025, 10:14 | 8.73 | 8.73 mg/l |
| 10 Apr 2025, 10:30 | 9.83 | 9.83 mg/l |
| 11 Mar 2025, 13:37 | 10.7 | 10.7 mg/l |
| 5 Feb 2025, 09:45 | 12 | 12 mg/l |
| 22 Jan 2025, 11:55 | 11.5 | 11.5 mg/l |
| 6 Dec 2024, 13:20 | 10.2 | 10.2 mg/l |
| 19 Nov 2024, 10:53 | 9.84 | 9.84 mg/l |
| 17 Oct 2024, 13:11 | 9.29 | 9.29 mg/l |
| 16 Sep 2024, 11:27 | 8.87 | 8.87 mg/l |
| 20 Aug 2024, 11:02 | 8.67 | 8.67 mg/l |
| 23 Jul 2024, 11:24 | 8.34 | 8.34 mg/l |
| 19 Jun 2024, 14:34 | 8.82 | 8.82 mg/l |
Water temperature
code 0076 · °C
13.3 °C
Sampled 1 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 10:07 | 13.3 | 13.3 °C |
| 15 Apr 2026, 10:29 | 12.4 | 12.4 °C |
| 24 Mar 2026, 14:05 | 11.7 | 11.7 °C |
| 25 Feb 2026, 14:59 | 10.7 | 10.7 °C |
| 26 Jan 2026, 13:43 | 7.1 | 7.1 °C |
| 12 Nov 2025, 09:42 | 13.1 | 13.1 °C |
| 7 Oct 2025, 14:14 | 13.8 | 13.8 °C |
| 4 Sep 2025, 09:34 | 15.6 | 15.6 °C |
| 5 Aug 2025, 11:46 | 17.9 | 17.9 °C |
| 18 Jul 2025, 10:25 | 19.7 | 19.7 °C |
| 19 Jun 2025, 12:47 | 19.9 | 19.9 °C |
| 6 May 2025, 10:14 | 12.5 | 12.5 °C |
| 10 Apr 2025, 10:30 | 10.9 | 10.9 °C |
| 11 Mar 2025, 13:37 | 9.4 | 9.4 °C |
| 5 Feb 2025, 09:45 | 6.6 | 6.6 °C |
| 22 Jan 2025, 11:55 | 6.6 | 6.6 °C |
| 6 Dec 2024, 13:20 | 9.6 | 9.6 °C |
| 19 Nov 2024, 10:53 | 9.2 | 9.2 °C |
| 17 Oct 2024, 13:11 | 13.2 | 13.2 °C |
| 16 Sep 2024, 11:27 | 15.4 | 15.4 °C |
| 20 Aug 2024, 11:02 | 18 | 18 °C |
| 23 Jul 2024, 11:24 | 18.1 | 18.1 °C |
| 19 Jun 2024, 14:34 | 15.9 | 15.9 °C |
pH
code 0061
8.06
Sampled 1 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 10:07 | 8.06 | 8.06 |
| 15 Apr 2026, 10:29 | 8.1 | 8.1 |
| 24 Mar 2026, 14:05 | 8.25 | 8.25 |
| 25 Feb 2026, 14:59 | 8.46 | 8.46 |
| 26 Jan 2026, 13:43 | 8.33 | 8.33 |
| 12 Nov 2025, 09:42 | 7.69 | 7.69 |
| 7 Oct 2025, 14:14 | 7.98 | 7.98 |
| 4 Sep 2025, 09:34 | 7.97 | 7.97 |
| 5 Aug 2025, 11:46 | 8.04 | 8.04 |
| 18 Jul 2025, 10:25 | 7.78 | 7.78 |
| 19 Jun 2025, 12:47 | 7.9 | 7.9 |
| 6 May 2025, 10:14 | 8.09 | 8.09 |
| 10 Apr 2025, 10:30 | 8.24 | 8.24 |
| 11 Mar 2025, 13:37 | 8.25 | 8.25 |
| 5 Feb 2025, 09:45 | 8.18 | 8.18 |
| 22 Jan 2025, 11:55 | 8.15 | 8.15 |
| 6 Dec 2024, 13:20 | 7.94 | 7.94 |
| 19 Nov 2024, 10:53 | 7.78 | 7.78 |
| 17 Oct 2024, 13:11 | 7.76 | 7.76 |
| 16 Sep 2024, 11:27 | 8.06 | 8.06 |
| 20 Aug 2024, 11:02 | 8.02 | 8.02 |
| 23 Jul 2024, 11:24 | 8.02 | 8.02 |
| 19 Jun 2024, 14:34 | 8.26 | 8.26 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.047 mg/l
Sampled 1 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 10:07 | 0.047 | 0.047 mg/l |
| 15 Apr 2026, 10:29 | 0.04 | 0.04 mg/l |
| 24 Mar 2026, 14:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Feb 2026, 14:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Jan 2026, 13:43 | 0.047 | 0.047 mg/l |
| 12 Nov 2025, 09:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Oct 2025, 14:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Sep 2025, 09:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Aug 2025, 11:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jul 2025, 10:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jun 2025, 12:47 | 0.031 | 0.031 mg/l |
| 6 May 2025, 10:14 | 0.097 | 0.097 mg/l |
| 10 Apr 2025, 10:30 | 0.076 | 0.076 mg/l |
| 11 Mar 2025, 13:37 | 0.071 | 0.071 mg/l |
| 5 Feb 2025, 09:45 | 0.07 | 0.07 mg/l |
| 22 Jan 2025, 11:55 | 0.05 | 0.05 mg/l |
| 19 Nov 2024, 10:53 | 0.037 | 0.037 mg/l |
| 17 Oct 2024, 13:11 | 0.078 | 0.078 mg/l |
| 16 Sep 2024, 11:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Aug 2024, 11:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Jul 2024, 11:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jun 2024, 14:34 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.87 mg/l
Sampled 1 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 10:07 | 1.87 | 1.87 mg/l |
| 15 Apr 2026, 10:29 | 2.07 | 2.07 mg/l |
| 24 Mar 2026, 14:05 | 2.58 | 2.58 mg/l |
| 25 Feb 2026, 14:59 | 1.79 | 1.79 mg/l |
| 26 Jan 2026, 13:43 | 1.99 | 1.99 mg/l |
| 12 Nov 2025, 09:42 | 2.49 | 2.49 mg/l |
| 7 Oct 2025, 14:14 | 3.27 | 3.27 mg/l |
| 4 Sep 2025, 09:34 | 2 | 2 mg/l |
| 5 Aug 2025, 11:46 | 0.971 | 0.971 mg/l |
| 18 Jul 2025, 10:25 | 1.09 | 1.09 mg/l |
| 19 Jun 2025, 12:47 | 1.48 | 1.48 mg/l |
| 6 May 2025, 10:14 | 1.36 | 1.36 mg/l |
| 10 Apr 2025, 10:30 | 1.57 | 1.57 mg/l |
| 11 Mar 2025, 13:37 | 2.28 | 2.28 mg/l |
| 5 Feb 2025, 09:45 | 2.58 | 2.58 mg/l |
| 22 Jan 2025, 11:55 | 2.58 | 2.58 mg/l |
| 19 Nov 2024, 10:53 | 2.58 | 2.58 mg/l |
| 17 Oct 2024, 13:11 | 1.78 | 1.78 mg/l |
| 16 Sep 2024, 11:27 | 0.986 | 0.986 mg/l |
| 20 Aug 2024, 11:02 | 0.996 | 0.996 mg/l |
| 23 Jul 2024, 11:24 | 1.29 | 1.29 mg/l |
| 19 Jun 2024, 14:34 | 2.18 | 2.18 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.17 mg/l
Sampled 1 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 10:07 | 0.17 | 0.17 mg/l |
| 15 Apr 2026, 10:29 | 0.13 | 0.13 mg/l |
| 24 Mar 2026, 14:05 | 0.13 | 0.13 mg/l |
| 25 Feb 2026, 14:59 | 0.069 | 0.069 mg/l |
| 26 Jan 2026, 13:43 | 0.089 | 0.089 mg/l |
| 12 Nov 2025, 09:42 | 0.51 | 0.51 mg/l |
| 7 Oct 2025, 14:14 | 0.29 | 0.29 mg/l |
| 4 Sep 2025, 09:34 | 0.38 | 0.38 mg/l |
| 5 Aug 2025, 11:46 | 0.23 | 0.23 mg/l |
| 18 Jul 2025, 10:25 | 0.23 | 0.23 mg/l |
| 19 Jun 2025, 12:47 | 0.23 | 0.23 mg/l |
| 6 May 2025, 10:14 | 0.16 | 0.16 mg/l |
| 10 Apr 2025, 10:30 | 0.12 | 0.12 mg/l |
| 11 Mar 2025, 13:37 | 0.11 | 0.11 mg/l |
| 5 Feb 2025, 09:45 | 0.1 | 0.1 mg/l |
| 22 Jan 2025, 11:55 | 0.16 | 0.16 mg/l |
| 19 Nov 2024, 10:53 | 0.33 | 0.33 mg/l |
| 17 Oct 2024, 13:11 | 0.24 | 0.24 mg/l |
| 16 Sep 2024, 11:27 | 0.14 | 0.14 mg/l |
| 20 Aug 2024, 11:02 | 0.18 | 0.18 mg/l |
| 23 Jul 2024, 11:24 | 0.17 | 0.17 mg/l |
| 19 Jun 2024, 14:34 | 0.23 | 0.23 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
615 µS/cm
Sampled 1 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 10:07 | 615 | 615 µS/cm |
| 15 Apr 2026, 10:29 | 693 | 693 µS/cm |
| 24 Mar 2026, 14:05 | 668 | 668 µS/cm |
| 25 Feb 2026, 14:59 | 532 | 532 µS/cm |
| 26 Jan 2026, 13:43 | 508 | 508 µS/cm |
| 12 Nov 2025, 09:42 | 540 | 540 µS/cm |
| 7 Oct 2025, 14:14 | 893 | 893 µS/cm |
| 4 Sep 2025, 09:34 | 676 | 676 µS/cm |
| 5 Aug 2025, 11:46 | 476 | 476 µS/cm |
| 18 Jul 2025, 10:25 | 625 | 625 µS/cm |
| 19 Jun 2025, 12:47 | 656 | 656 µS/cm |
| 6 May 2025, 10:14 | 731 | 731 µS/cm |
| 10 Apr 2025, 10:30 | 665 | 665 µS/cm |
| 11 Mar 2025, 13:37 | 642 | 642 µS/cm |
| 5 Feb 2025, 09:45 | 665 | 665 µS/cm |
| 22 Jan 2025, 11:55 | 665 | 665 µS/cm |
| 6 Dec 2024, 13:20 | 603 | 603 µS/cm |
| 19 Nov 2024, 10:53 | 604 | 604 µS/cm |
| 17 Oct 2024, 13:11 | 559 | 559 µS/cm |
| 16 Sep 2024, 11:27 | 526 | 526 µS/cm |
| 20 Aug 2024, 11:02 | 558 | 558 µS/cm |
| 23 Jul 2024, 11:24 | 505 | 505 µS/cm |
| 19 Jun 2024, 14:34 | 652 | 652 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
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 23 | Jun 2024 – May 2026 | 83.6% 1 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 23 | Jun 2024 – May 2026 | 8.73 mg/l 1 May 2026 |
| Temperature of Water 0076 | River water | 23 | Jun 2024 – May 2026 | 13.3 °C 1 May 2026 |
| pH 0061 | River water | 23 | Jun 2024 – May 2026 | 8.06 1 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Jun 2024 – May 2026 | 0.047 mg/l 1 May 2026 |
| Nitrate as N 0117 | River water | 22 | Jun 2024 – May 2026 | 1.87 mg/l 1 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Jun 2024 – May 2026 | 0.17 mg/l 1 May 2026 |
| Conductivity at 25 C 0077 | River water | 23 | Jun 2024 – May 2026 | 615 µS/cm 1 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Jun 2024 – May 2026 | 230 mg/l 1 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Jun 2024 – May 2026 | 0.00109 mg/l 1 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 21 | Jun 2024 – May 2026 | 1.4 mg/l 1 May 2026 |
| Nitrite as N 0118 | River water | 22 | Jun 2024 – May 2026 | 0.03 mg/l 1 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Jun 2024 – May 2026 | 1.9 mg/l 1 May 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.