River Ouse East Mascalls Bridge
EA name: R OUSE EAST MASCALLS BRIDGE (also listed as “RIVER OUSE EAST MASCALLS BRIDGE”)
Environment Agency sampling point SO-F0002167 · 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
- 21 May 2026, 14:124 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
- 29 since 4 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 536530, 125450As published, to the nearest 10 m. Open in a map
- River, by its own name
- Ouse
- River, by the map
- River OusePlaced on the river its name gives, 16 m from the line.
- Next gauge downstream
- Freshfield Bridge On the River Ouse · 3.0 km along the river
- Nearest gauge upstream
- Lindfield Bridge On the River Ouse · 1.8 km along the river
- Why it was sampled
- Monitoring (national agency policy) (29 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
97.3%
Sampled 21 May 2026, 4 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 14:12 | 97.3 | 97.3% |
| 1 Apr 2026, 13:40 | 89.8 | 89.8% |
| 5 Mar 2026, 11:58 | 98.4 | 98.4% |
| 12 Feb 2026, 11:02 | 102.4 | 102.4% |
| 29 Jan 2026, 10:37 | 96.5 | 96.5% |
| 2 Dec 2025, 12:40 | 97.9 | 97.9% |
| 4 Nov 2025, 11:55 | 93.2 | 93.2% |
| 1 Oct 2025, 12:41 | 90.1 | 90.1% |
| 3 Sep 2025, 13:19 | 89.2 | 89.2% |
| 6 Aug 2025, 12:05 | 88.5 | 88.5% |
| 31 Jul 2025, 14:20 | 88 | 88% |
| 5 Jun 2025, 15:54 | 93.5 | 93.5% |
| 2 May 2025, 12:04 | 100.2 | 100.2% |
| 2 Apr 2025, 13:02 | 112.8 | 112.8% |
| 4 Mar 2025, 13:58 | 102.4 | 102.4% |
| 11 Feb 2025, 11:23 | 100 | 100% |
| 24 Jan 2025, 09:55 | 97.9 | 97.9% |
| 10 Dec 2024, 13:24 | 96.5 | 96.5% |
| 22 Nov 2024, 12:56 | 95 | 95% |
| 29 Oct 2024, 10:22 | 94.5 | 94.5% |
| 25 Sep 2024, 10:59 | 89.4 | 89.4% |
| 28 Aug 2024, 11:55 | 92.7 | 92.7% |
| 15 Jul 2024, 13:33 | 90.3 | 90.3% |
| 21 Jun 2024, 13:33 | 93.4 | 93.4% |
| 1 Feb 2024, 11:01 | 96.2 | 96.2% |
| 4 Jan 2024, 13:26 | 98 | 98% |
| 5 Dec 2023, 10:28 | 92.9 | 92.9% |
| 16 Nov 2023, 11:50 | 94.4 | 94.4% |
| 4 Oct 2023, 14:41 | 90.6 | 90.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.38 mg/l
Sampled 21 May 2026, 4 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 14:12 | 9.38 | 9.38 mg/l |
| 1 Apr 2026, 13:40 | 10 | 10 mg/l |
| 5 Mar 2026, 11:58 | 11.4 | 11.4 mg/l |
| 12 Feb 2026, 11:02 | 11.9 | 11.9 mg/l |
| 29 Jan 2026, 10:37 | 12 | 12 mg/l |
| 2 Dec 2025, 12:40 | 11.3 | 11.3 mg/l |
| 4 Nov 2025, 11:55 | 9.95 | 9.95 mg/l |
| 1 Oct 2025, 12:41 | 9.47 | 9.47 mg/l |
| 3 Sep 2025, 13:19 | 8.51 | 8.51 mg/l |
| 6 Aug 2025, 12:05 | 8.43 | 8.43 mg/l |
| 31 Jul 2025, 14:20 | 8.21 | 8.21 mg/l |
| 5 Jun 2025, 15:54 | 9.85 | 9.85 mg/l |
| 2 May 2025, 12:04 | 10.4 | 10.4 mg/l |
| 2 Apr 2025, 13:02 | 12.4 | 12.4 mg/l |
| 4 Mar 2025, 13:58 | 12.7 | 12.7 mg/l |
| 11 Feb 2025, 11:23 | 12.7 | 12.7 mg/l |
| 24 Jan 2025, 09:55 | 12 | 12 mg/l |
| 10 Dec 2024, 13:24 | 11.4 | 11.4 mg/l |
| 22 Nov 2024, 12:56 | 12 | 12 mg/l |
| 29 Oct 2024, 10:22 | 9.96 | 9.96 mg/l |
| 25 Sep 2024, 10:59 | 9.01 | 9.01 mg/l |
| 28 Aug 2024, 11:55 | 8.92 | 8.92 mg/l |
| 15 Jul 2024, 13:33 | 9.28 | 9.28 mg/l |
| 21 Jun 2024, 13:33 | 9.33 | 9.33 mg/l |
| 1 Feb 2024, 11:01 | 11.7 | 11.7 mg/l |
| 4 Jan 2024, 13:26 | 11.5 | 11.5 mg/l |
| 5 Dec 2023, 10:28 | 11.3 | 11.3 mg/l |
| 16 Nov 2023, 11:50 | 10.9 | 10.9 mg/l |
| 4 Oct 2023, 14:41 | 8.96 | 8.96 mg/l |
Water temperature
code 0076 · °C
17 °C
Sampled 21 May 2026, 4 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 14:12 | 17 | 17 °C |
| 1 Apr 2026, 13:40 | 10.4 | 10.4 °C |
| 5 Mar 2026, 11:58 | 8.7 | 8.7 °C |
| 12 Feb 2026, 11:02 | 8.7 | 8.7 °C |
| 29 Jan 2026, 10:37 | 5.9 | 5.9 °C |
| 2 Dec 2025, 12:40 | 8.9 | 8.9 °C |
| 4 Nov 2025, 11:55 | 12.3 | 12.3 °C |
| 1 Oct 2025, 12:41 | 13 | 13 °C |
| 3 Sep 2025, 13:19 | 17.5 | 17.5 °C |
| 6 Aug 2025, 12:05 | 17.6 | 17.6 °C |
| 31 Jul 2025, 14:20 | 18.6 | 18.6 °C |
| 5 Jun 2025, 15:54 | 12.9 | 12.9 °C |
| 2 May 2025, 12:04 | 13.5 | 13.5 °C |
| 2 Apr 2025, 13:02 | 11 | 11 °C |
| 4 Mar 2025, 13:58 | 6 | 6 °C |
| 11 Feb 2025, 11:23 | 5.1 | 5.1 °C |
| 24 Jan 2025, 09:55 | 6.7 | 6.7 °C |
| 10 Dec 2024, 13:24 | 7.9 | 7.9 °C |
| 22 Nov 2024, 12:56 | 5.3 | 5.3 °C |
| 29 Oct 2024, 10:22 | 12.9 | 12.9 °C |
| 25 Sep 2024, 10:59 | 14.9 | 14.9 °C |
| 28 Aug 2024, 11:55 | 17.1 | 17.1 °C |
| 15 Jul 2024, 13:33 | 14 | 14 °C |
| 21 Jun 2024, 13:33 | 15.3 | 15.3 °C |
| 1 Feb 2024, 11:01 | 7 | 7 °C |
| 4 Jan 2024, 13:26 | 8.3 | 8.3 °C |
| 5 Dec 2023, 10:28 | 7 | 7 °C |
| 16 Nov 2023, 11:50 | 8.8 | 8.8 °C |
| 4 Oct 2023, 14:41 | 15.8 | 15.8 °C |
pH
code 0061
7.55
Sampled 21 May 2026, 4 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 14:12 | 7.55 | 7.55 |
| 1 Apr 2026, 13:40 | 7.8 | 7.8 |
| 5 Mar 2026, 11:58 | 7.56 | 7.56 |
| 12 Feb 2026, 11:02 | 7.61 | 7.61 |
| 29 Jan 2026, 10:37 | 7.53 | 7.53 |
| 2 Dec 2025, 12:40 | 7.47 | 7.47 |
| 4 Nov 2025, 11:55 | 7.48 | 7.48 |
| 1 Oct 2025, 12:41 | 7.56 | 7.56 |
| 3 Sep 2025, 13:19 | 7.66 | 7.66 |
| 6 Aug 2025, 12:05 | 7.85 | 7.85 |
| 31 Jul 2025, 14:20 | 7.71 | 7.71 |
| 5 Jun 2025, 15:54 | 7.47 | 7.47 |
| 2 May 2025, 12:04 | 7.7 | 7.7 |
| 2 Apr 2025, 13:02 | 8.05 | 8.05 |
| 4 Mar 2025, 13:58 | 7.67 | 7.67 |
| 11 Feb 2025, 11:23 | 7.65 | 7.65 |
| 24 Jan 2025, 09:55 | 7.61 | 7.61 |
| 10 Dec 2024, 13:24 | 7.46 | 7.46 |
| 22 Nov 2024, 12:56 | 7.7 | 7.7 |
| 29 Oct 2024, 10:22 | 7.47 | 7.47 |
| 25 Sep 2024, 10:59 | 7.48 | 7.48 |
| 28 Aug 2024, 11:55 | 7.48 | 7.48 |
| 15 Jul 2024, 13:33 | 7.59 | 7.59 |
| 21 Jun 2024, 13:33 | 7.51 | 7.51 |
| 1 Feb 2024, 11:01 | 7.64 | 7.64 |
| 4 Jan 2024, 13:26 | 7.44 | 7.44 |
| 5 Dec 2023, 10:28 | 7.4 | 7.4 |
| 16 Nov 2023, 11:50 | 7.39 | 7.39 |
| 4 Oct 2023, 14:41 | 8.01 | 8.01 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.029 mg/l
Sampled 21 May 2026, 4 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 14:12 | 0.029 | 0.029 mg/l |
| 1 Apr 2026, 13:40 | 0.072 | 0.072 mg/l |
| 5 Mar 2026, 11:58 | 0.063 | 0.063 mg/l |
| 12 Feb 2026, 11:02 | 0.17 | 0.17 mg/l |
| 29 Jan 2026, 10:37 | 0.055 | 0.055 mg/l |
| 2 Dec 2025, 12:40 | 0.047 | 0.047 mg/l |
| 4 Nov 2025, 11:55 | 0.034 | 0.034 mg/l |
| 1 Oct 2025, 12:41 | 0.015 | 0.015 mg/l |
| 3 Sep 2025, 13:19 | 0.021 | 0.021 mg/l |
| 6 Aug 2025, 12:05 | 0.0074 | 0.0074 mg/l |
| 31 Jul 2025, 14:20 | 0.038 | 0.038 mg/l |
| 5 Jun 2025, 15:54 | 0.018 | 0.018 mg/l |
| 2 May 2025, 12:04 | 0.031 | 0.031 mg/l |
| 2 Apr 2025, 13:02 | 0.009 | 0.009 mg/l |
| 4 Mar 2025, 13:58 | 0.043 | 0.043 mg/l |
| 11 Feb 2025, 11:23 | 0.063 | 0.063 mg/l |
| 24 Jan 2025, 09:55 | 0.74 | 0.74 mg/l |
| 10 Dec 2024, 13:24 | 0.13 | 0.13 mg/l |
| 22 Nov 2024, 12:56 | 0.07 | 0.07 mg/l |
| 29 Oct 2024, 10:22 | 0.045 | 0.045 mg/l |
| 28 Aug 2024, 11:55 | 0.067 | 0.067 mg/l |
| 15 Jul 2024, 13:33 | 0.027 | 0.027 mg/l |
| 21 Jun 2024, 13:33 | 0.018 | 0.018 mg/l |
| 1 Feb 2024, 11:01 | 0.055 | 0.055 mg/l |
| 4 Jan 2024, 13:26 | 0.043 | 0.043 mg/l |
| 5 Dec 2023, 10:28 | 0.084 | 0.084 mg/l |
| 16 Nov 2023, 11:50 | 0.075 | 0.075 mg/l |
| 4 Oct 2023, 14:41 | 0.015 | 0.015 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.38 mg/l
Sampled 21 May 2026, 4 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 14:12 | 2.38 | 2.38 mg/l |
| 1 Apr 2026, 13:40 | 2.38 | 2.38 mg/l |
| 5 Mar 2026, 11:58 | 2.48 | 2.48 mg/l |
| 12 Feb 2026, 11:02 | 1.98 | 1.98 mg/l |
| 29 Jan 2026, 10:37 | 2.09 | 2.09 mg/l |
| 2 Dec 2025, 12:40 | 2.88 | 2.88 mg/l |
| 4 Nov 2025, 11:55 | 4.28 | 4.28 mg/l |
| 1 Oct 2025, 12:41 | 1.39 | 1.39 mg/l |
| 3 Sep 2025, 13:19 | 1.28 | 1.28 mg/l |
| 6 Aug 2025, 12:05 | 1.29 | 1.29 mg/l |
| 31 Jul 2025, 14:20 | 0.971 | 0.971 mg/l |
| 5 Jun 2025, 15:54 | 1.79 | 1.79 mg/l |
| 2 May 2025, 12:04 | 2.18 | 2.18 mg/l |
| 2 Apr 2025, 13:02 | 2.69 | 2.69 mg/l |
| 4 Mar 2025, 13:58 | 2.48 | 2.48 mg/l |
| 11 Feb 2025, 11:23 | 2.38 | 2.38 mg/l |
| 24 Jan 2025, 09:55 | 2.55 | 2.55 mg/l |
| 10 Dec 2024, 13:24 | 2.08 | 2.08 mg/l |
| 22 Nov 2024, 12:56 | 2.48 | 2.48 mg/l |
| 29 Oct 2024, 10:22 | 2.77 | 2.77 mg/l |
| 28 Aug 2024, 11:55 | 0.936 | 0.936 mg/l |
| 15 Jul 2024, 13:33 | 1.68 | 1.68 mg/l |
| 21 Jun 2024, 13:33 | 2.29 | 2.29 mg/l |
| 1 Feb 2024, 11:01 | 2.78 | 2.78 mg/l |
| 4 Jan 2024, 13:26 | 1.99 | 1.99 mg/l |
| 5 Dec 2023, 10:28 | 1.98 | 1.98 mg/l |
| 16 Nov 2023, 11:50 | 2.47 | 2.47 mg/l |
| 4 Oct 2023, 14:41 | 1.09 | 1.09 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.027 mg/l
Sampled 21 May 2026, 4 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 14:12 | 0.027 | 0.027 mg/l |
| 1 Apr 2026, 13:40 | 0.029 | 0.029 mg/l |
| 5 Mar 2026, 11:58 | 0.055 | 0.055 mg/l |
| 12 Feb 2026, 11:02 | 0.076 | 0.076 mg/l |
| 29 Jan 2026, 10:37 | 0.054 | 0.054 mg/l |
| 2 Dec 2025, 12:40 | 0.086 | 0.086 mg/l |
| 4 Nov 2025, 11:55 | 0.06 | 0.06 mg/l |
| 1 Oct 2025, 12:41 | 0.034 | 0.034 mg/l |
| 3 Sep 2025, 13:19 | 0.043 | 0.043 mg/l |
| 6 Aug 2025, 12:05 | 0.056 | 0.056 mg/l |
| 31 Jul 2025, 14:20 | 0.046 | 0.046 mg/l |
| 5 Jun 2025, 15:54 | 0.032 | 0.032 mg/l |
| 2 May 2025, 12:04 | 0.039 | 0.039 mg/l |
| 2 Apr 2025, 13:02 | 0.027 | 0.027 mg/l |
| 4 Mar 2025, 13:58 | 0.036 | 0.036 mg/l |
| 11 Feb 2025, 11:23 | 0.042 | 0.042 mg/l |
| 24 Jan 2025, 09:55 | 0.15 | 0.15 mg/l |
| 10 Dec 2024, 13:24 | 0.082 | 0.082 mg/l |
| 22 Nov 2024, 12:56 | 0.058 | 0.058 mg/l |
| 29 Oct 2024, 10:22 | 0.058 | 0.058 mg/l |
| 28 Aug 2024, 11:55 | 0.034 | 0.034 mg/l |
| 15 Jul 2024, 13:33 | 0.05 | 0.05 mg/l |
| 21 Jun 2024, 13:33 | 0.03 | 0.03 mg/l |
| 1 Feb 2024, 11:01 | 0.026 | 0.026 mg/l |
| 4 Jan 2024, 13:26 | 0.028 | 0.028 mg/l |
| 5 Dec 2023, 10:28 | 0.044 | 0.044 mg/l |
| 16 Nov 2023, 11:50 | 0.032 | 0.032 mg/l |
| 4 Oct 2023, 14:41 | 0.017 | 0.017 mg/l |
Turbidity
code 6396 · NTU
12 NTU
Sampled 1 Feb 2024, 2.7 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Feb 2024, 11:01 | 12 | 12 NTU |
| 4 Jan 2024, 13:26 | 21 | 21 NTU |
| 5 Dec 2023, 10:28 | 28 | 28 NTU |
| 16 Nov 2023, 11:50 | 16 | 16 NTU |
| 4 Oct 2023, 14:41 | 4.9 | 4.9 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
310 µS/cm
Sampled 21 May 2026, 4 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 14:12 | 310 | 310 µS/cm |
| 1 Apr 2026, 13:40 | 293 | 293 µS/cm |
| 5 Mar 2026, 11:58 | 271 | 271 µS/cm |
| 12 Feb 2026, 11:02 | 234 | 234 µS/cm |
| 29 Jan 2026, 10:37 | 222 | 222 µS/cm |
| 2 Dec 2025, 12:40 | 303 | 303 µS/cm |
| 4 Nov 2025, 11:55 | 336 | 336 µS/cm |
| 1 Oct 2025, 12:41 | 309 | 309 µS/cm |
| 3 Sep 2025, 13:19 | 295 | 295 µS/cm |
| 6 Aug 2025, 12:05 | 287 | 287 µS/cm |
| 31 Jul 2025, 14:20 | 254 | 254 µS/cm |
| 5 Jun 2025, 15:54 | 277 | 277 µS/cm |
| 2 May 2025, 12:04 | 279 | 279 µS/cm |
| 2 Apr 2025, 13:02 | 312 | 312 µS/cm |
| 4 Mar 2025, 13:58 | 280 | 280 µS/cm |
| 11 Feb 2025, 11:23 | 281 | 281 µS/cm |
| 24 Jan 2025, 09:55 | 327 | 327 µS/cm |
| 10 Dec 2024, 13:24 | 253 | 253 µS/cm |
| 22 Nov 2024, 12:56 | 315 | 315 µS/cm |
| 29 Oct 2024, 10:22 | 320 | 320 µS/cm |
| 25 Sep 2024, 10:59 | 297 | 297 µS/cm |
| 28 Aug 2024, 11:55 | 245 | 245 µS/cm |
| 15 Jul 2024, 13:33 | 264 | 264 µS/cm |
| 21 Jun 2024, 13:33 | 287 | 287 µS/cm |
| 1 Feb 2024, 11:01 | 289 | 289 µS/cm |
| 4 Jan 2024, 13:26 | 240 | 240 µS/cm |
| 5 Dec 2023, 10:28 | 234 | 234 µS/cm |
| 16 Nov 2023, 11:50 | 274 | 274 µS/cm |
| 4 Oct 2023, 14:41 | 279 | 279 µS/cm |
Everything measured here
16 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 16 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 29 | Oct 2023 – May 2026 | 97.3% 21 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 29 | Oct 2023 – May 2026 | 9.38 mg/l 21 May 2026 |
| Temperature of Water 0076 | River water | 29 | Oct 2023 – May 2026 | 17 °C 21 May 2026 |
| pH 0061 | River water | 29 | Oct 2023 – May 2026 | 7.55 21 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 28 | Oct 2023 – May 2026 | 0.029 mg/l 21 May 2026 |
| Nitrate as N 0117 | River water | 28 | Oct 2023 – May 2026 | 2.38 mg/l 21 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 28 | Oct 2023 – May 2026 | 0.027 mg/l 21 May 2026 |
| Turbidity 6396 | River water | 5 | Oct 2023 – Feb 2024 | 12 NTU 1 Feb 2024 |
| Conductivity at 25 C 0077 | River water | 29 | Oct 2023 – May 2026 | 310 µS/cm 21 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 29 | Oct 2023 – May 2026 | 69 mg/l 21 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 28 | Oct 2023 – May 2026 | 0.00032 mg/l 21 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 23 | Jun 2024 – May 2026 | 1.9 mg/l 21 May 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 5 | Oct 2023 – Feb 2024 | 1.6 µg/l 1 Feb 2024 |
| Nitrite as N 0118 | River water | 28 | Oct 2023 – May 2026 | 0.019 mg/l 21 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 28 | Oct 2023 – May 2026 | 2.4 mg/l 21 May 2026 |
| Solids, Suspended at 105 C 0135 | River water | 5 | Oct 2023 – Feb 2024 | 6.8 mg/l 1 Feb 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.