Tees at Over Dinsdale
EA name: TEES AT OVER DINSDALE
Environment Agency sampling point NE-45400018 · 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 Sep 2026, 08:5630 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 27 since 11 Jul 2024 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 434604, 511373As published, to the nearest 1 m. Open in a map
- River, by its own name
- Tees
- River, by the map
- River TeesPlaced on the river its name gives, 3 m from the line.
- Next gauge downstream
- Low Moor On the River Tees · 4.2 km along the river
- Nearest gauge upstream
- Hurworth On the River Tees · 17 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (27 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
79.1%
Sampled 1 Sep 2026, 30 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 08:56 | 79.1 | 79.1% |
| 5 Aug 2026, 11:21 | 94.6 | 94.6% |
| 20 Jul 2026, 09:45 | 93.8 | 93.8% |
| 3 Jun 2026, 11:59 | 91.9 | 91.9% |
| 5 May 2026, 09:08 | 92.2 | 92.2% |
| 10 Apr 2026, 10:54 | 101.7 | 101.7% |
| 23 Mar 2026, 08:15 | 99.1 | 99.1% |
| 11 Feb 2026, 08:42 | 99.6 | 99.6% |
| 22 Jan 2026, 12:30 | 99.7 | 99.7% |
| 15 Dec 2025, 09:12 | 98.2 | 98.2% |
| 25 Nov 2025, 11:43 | 98.2 | 98.2% |
| 17 Oct 2025, 08:28 | 89.7 | 89.7% |
| 5 Sep 2025, 12:07 | 92.5 | 92.5% |
| 22 Aug 2025, 11:48 | 100.6 | 100.6% |
| 10 Jul 2025, 09:21 | 86 | 86% |
| 9 Jun 2025, 14:23 | 107.8 | 107.8% |
| 7 May 2025, 13:18 | 113.9 | 113.9% |
| 1 Apr 2025, 12:13 | 102.9 | 102.9% |
| 6 Mar 2025, 11:20 | 104.4 | 104.4% |
| 7 Feb 2025, 09:18 | 94.9 | 94.9% |
| 13 Jan 2025, 08:57 | 97.4 | 97.4% |
| 3 Dec 2024, 14:37 | 97.5 | 97.5% |
| 1 Nov 2024, 09:18 | 94.3 | 94.3% |
| 1 Oct 2024, 09:17 | 87.7 | 87.7% |
| 4 Sep 2024, 15:04 | 102.5 | 102.5% |
| 8 Aug 2024, 13:48 | 131.1 | 131.1% |
| 11 Jul 2024, 09:08 | 94.4 | 94.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.74 mg/l
Sampled 1 Sep 2026, 30 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 08:56 | 7.74 | 7.74 mg/l |
| 5 Aug 2026, 11:21 | 8.72 | 8.72 mg/l |
| 20 Jul 2026, 09:45 | 9 | 9 mg/l |
| 3 Jun 2026, 11:59 | 8.95 | 8.95 mg/l |
| 5 May 2026, 09:08 | 9.87 | 9.87 mg/l |
| 10 Apr 2026, 10:54 | 11.5 | 11.5 mg/l |
| 23 Mar 2026, 08:15 | 11.9 | 11.9 mg/l |
| 11 Feb 2026, 08:42 | 12.4 | 12.4 mg/l |
| 22 Jan 2026, 12:30 | 12.5 | 12.5 mg/l |
| 15 Dec 2025, 09:12 | 11.6 | 11.6 mg/l |
| 25 Nov 2025, 11:43 | 12.2 | 12.2 mg/l |
| 17 Oct 2025, 08:28 | 9.89 | 9.89 mg/l |
| 5 Sep 2025, 12:07 | 9.13 | 9.13 mg/l |
| 22 Aug 2025, 11:48 | 9.86 | 9.86 mg/l |
| 10 Jul 2025, 09:21 | 7.91 | 7.91 mg/l |
| 9 Jun 2025, 14:23 | 10.9 | 10.9 mg/l |
| 7 May 2025, 13:18 | 11.6 | 11.6 mg/l |
| 1 Apr 2025, 12:13 | 11.3 | 11.3 mg/l |
| 6 Mar 2025, 11:20 | 12.6 | 12.6 mg/l |
| 7 Feb 2025, 09:18 | 12.8 | 12.8 mg/l |
| 13 Jan 2025, 08:57 | 13.6 | 13.6 mg/l |
| 3 Dec 2024, 14:37 | 11.9 | 11.9 mg/l |
| 1 Nov 2024, 09:18 | 10.6 | 10.6 mg/l |
| 1 Oct 2024, 09:17 | 9.65 | 9.65 mg/l |
| 4 Sep 2024, 15:04 | 10 | 10 mg/l |
| 8 Aug 2024, 13:48 | 12.3 | 12.3 mg/l |
| 11 Jul 2024, 09:08 | 9.75 | 9.75 mg/l |
Water temperature
code 0076 · °C
16.3 °C
Sampled 1 Sep 2026, 30 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 08:56 | 16.3 | 16.3 °C |
| 5 Aug 2026, 11:21 | 19.2 | 19.2 °C |
| 20 Jul 2026, 09:45 | 17.2 | 17.2 °C |
| 3 Jun 2026, 11:59 | 16.5 | 16.5 °C |
| 5 May 2026, 09:08 | 12.2 | 12.2 °C |
| 10 Apr 2026, 10:54 | 9.8 | 9.8 °C |
| 23 Mar 2026, 08:15 | 7.3 | 7.3 °C |
| 11 Feb 2026, 08:42 | 6 | 6 °C |
| 22 Jan 2026, 12:30 | 5.7 | 5.7 °C |
| 15 Dec 2025, 09:12 | 8.1 | 8.1 °C |
| 25 Nov 2025, 11:43 | 6 | 6 °C |
| 17 Oct 2025, 08:28 | 10.9 | 10.9 °C |
| 5 Sep 2025, 12:07 | 15.9 | 15.9 °C |
| 22 Aug 2025, 11:48 | 16.2 | 16.2 °C |
| 10 Jul 2025, 09:21 | 19.3 | 19.3 °C |
| 9 Jun 2025, 14:23 | 14.6 | 14.6 °C |
| 7 May 2025, 13:18 | 14.6 | 14.6 °C |
| 1 Apr 2025, 12:13 | 11.1 | 11.1 °C |
| 6 Mar 2025, 11:20 | 7.2 | 7.2 °C |
| 7 Feb 2025, 09:18 | 2.8 | 2.8 °C |
| 13 Jan 2025, 08:57 | 1.5 | 1.5 °C |
| 3 Dec 2024, 14:37 | 6.7 | 6.7 °C |
| 1 Nov 2024, 09:18 | 10.1 | 10.1 °C |
| 1 Oct 2024, 09:17 | 11 | 11 °C |
| 4 Sep 2024, 15:04 | 16.3 | 16.3 °C |
| 8 Aug 2024, 13:48 | 18.2 | 18.2 °C |
| 11 Jul 2024, 09:08 | 13.8 | 13.8 °C |
pH
code 0061
7.81
Sampled 1 Sep 2026, 30 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 08:56 | 7.81 | 7.81 |
| 5 Aug 2026, 11:21 | 7.94 | 7.94 |
| 20 Jul 2026, 09:45 | 8.06 | 8.06 |
| 3 Jun 2026, 11:59 | 8.36 | 8.36 |
| 5 May 2026, 09:08 | 8.14 | 8.14 |
| 10 Apr 2026, 10:54 | 8.31 | 8.31 |
| 23 Mar 2026, 08:15 | 8.27 | 8.27 |
| 11 Feb 2026, 08:42 | 8.17 | 8.17 |
| 22 Jan 2026, 12:30 | 7.88 | 7.88 |
| 15 Dec 2025, 09:12 | 8.25 | 8.25 |
| 25 Nov 2025, 11:43 | 7.93 | 7.93 |
| 17 Oct 2025, 08:28 | 7.69 | 7.69 |
| 5 Sep 2025, 12:07 | 7.67 | 7.67 |
| 22 Aug 2025, 11:48 | 8.07 | 8.07 |
| 10 Jul 2025, 09:21 | 7.5 | 7.5 |
| 9 Jun 2025, 14:23 | 8.1 | 8.1 |
| 7 May 2025, 13:18 | 8.57 | 8.57 |
| 1 Apr 2025, 12:13 | 8.35 | 8.35 |
| 6 Mar 2025, 11:20 | 8.24 | 8.24 |
| 7 Feb 2025, 09:18 | 8.24 | 8.24 |
| 13 Jan 2025, 08:57 | 8.06 | 8.06 |
| 3 Dec 2024, 14:37 | 8.4 | 8.4 |
| 1 Nov 2024, 09:18 | 8.2 | 8.2 |
| 1 Oct 2024, 09:17 | 7.7 | 7.7 |
| 4 Sep 2024, 15:04 | 8.22 | 8.22 |
| 8 Aug 2024, 13:48 | 8.77 | 8.77 |
| 11 Jul 2024, 09:08 | 7.65 | 7.65 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.14 mg/l
Sampled 1 Sep 2026, 30 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 08:56 | 0.14 | 0.14 mg/l |
| 5 Aug 2026, 11:21 | 0.012 | 0.012 mg/l |
| 20 Jul 2026, 09:45 | 0.014 | 0.014 mg/l |
| 3 Jun 2026, 11:59 | 0.04 | 0.04 mg/l |
| 5 May 2026, 09:08 | 0.011 | 0.011 mg/l |
| 10 Apr 2026, 10:54 | <0.002 | below 0.002 mg/l (not detected above this) |
| 23 Mar 2026, 08:15 | 0.011 | 0.011 mg/l |
| 11 Feb 2026, 08:42 | 0.13 | 0.13 mg/l |
| 22 Jan 2026, 12:30 | 0.023 | 0.023 mg/l |
| 15 Dec 2025, 09:12 | 0.092 | 0.092 mg/l |
| 25 Nov 2025, 11:43 | 0.024 | 0.024 mg/l |
| 17 Oct 2025, 08:28 | 0.024 | 0.024 mg/l |
| 5 Sep 2025, 12:07 | 0.019 | 0.019 mg/l |
| 22 Aug 2025, 11:48 | 0.0084 | 0.0084 mg/l |
| 10 Jul 2025, 09:21 | 0.023 | 0.023 mg/l |
| 9 Jun 2025, 14:23 | 0.012 | 0.012 mg/l |
| 7 May 2025, 13:18 | 0.043 | 0.043 mg/l |
| 1 Apr 2025, 12:13 | 0.0067 | 0.0067 mg/l |
| 6 Mar 2025, 11:20 | 0.013 | 0.013 mg/l |
| 7 Feb 2025, 09:18 | 0.036 | 0.036 mg/l |
| 13 Jan 2025, 08:57 | 0.069 | 0.069 mg/l |
| 3 Dec 2024, 14:37 | 0.029 | 0.029 mg/l |
| 1 Nov 2024, 09:18 | 0.017 | 0.017 mg/l |
| 1 Oct 2024, 09:17 | 0.53 | 0.53 mg/l |
| 4 Sep 2024, 15:04 | 0.015 | 0.015 mg/l |
| 8 Aug 2024, 13:48 | 0.005 | 0.005 mg/l |
| 11 Jul 2024, 09:08 | 0.11 | 0.11 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.85 mg/l
Sampled 1 Sep 2026, 30 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 08:56 | 2.85 | 2.85 mg/l |
| 5 Aug 2026, 11:21 | 3.37 | 3.37 mg/l |
| 20 Jul 2026, 09:45 | 2.57 | 2.57 mg/l |
| 3 Jun 2026, 11:59 | 1.28 | 1.28 mg/l |
| 5 May 2026, 09:08 | 2.38 | 2.38 mg/l |
| 10 Apr 2026, 10:54 | 2.99 | 2.99 mg/l |
| 23 Mar 2026, 08:15 | 3.79 | 3.79 mg/l |
| 11 Feb 2026, 08:42 | 3.47 | 3.47 mg/l |
| 22 Jan 2026, 12:30 | 1.88 | 1.88 mg/l |
| 15 Dec 2025, 09:12 | 4.07 | 4.07 mg/l |
| 25 Nov 2025, 11:43 | 3.19 | 3.19 mg/l |
| 17 Oct 2025, 08:28 | 3.94 | 3.94 mg/l |
| 5 Sep 2025, 12:07 | 1.49 | 1.49 mg/l |
| 22 Aug 2025, 11:48 | 3.89 | 3.89 mg/l |
| 10 Jul 2025, 09:21 | 2.08 | 2.08 mg/l |
| 9 Jun 2025, 14:23 | 0.287 | 0.287 mg/l |
| 7 May 2025, 13:18 | 5.36 | 5.36 mg/l |
| 1 Apr 2025, 12:13 | 2.79 | 2.79 mg/l |
| 6 Mar 2025, 11:20 | 3.58 | 3.58 mg/l |
| 7 Feb 2025, 09:18 | 2.88 | 2.88 mg/l |
| 13 Jan 2025, 08:57 | 3.88 | 3.88 mg/l |
| 3 Dec 2024, 14:37 | 1.88 | 1.88 mg/l |
| 1 Nov 2024, 09:18 | 2.39 | 2.39 mg/l |
| 1 Oct 2024, 09:17 | 4.64 | 4.64 mg/l |
| 4 Sep 2024, 15:04 | 2.08 | 2.08 mg/l |
| 8 Aug 2024, 13:48 | 1.99 | 1.99 mg/l |
| 11 Jul 2024, 09:08 | 0.442 | 0.442 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.29 mg/l
Sampled 1 Sep 2026, 30 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 08:56 | 0.29 | 0.29 mg/l |
| 5 Aug 2026, 11:21 | 0.48 | 0.48 mg/l |
| 20 Jul 2026, 09:45 | 0.32 | 0.32 mg/l |
| 3 Jun 2026, 11:59 | 0.12 | 0.12 mg/l |
| 5 May 2026, 09:08 | 0.16 | 0.16 mg/l |
| 10 Apr 2026, 10:54 | 0.21 | 0.21 mg/l |
| 23 Mar 2026, 08:15 | 0.15 | 0.15 mg/l |
| 11 Feb 2026, 08:42 | 0.076 | 0.076 mg/l |
| 22 Jan 2026, 12:30 | 0.05 | 0.05 mg/l |
| 15 Dec 2025, 09:12 | 0.11 | 0.11 mg/l |
| 25 Nov 2025, 11:43 | 0.058 | 0.058 mg/l |
| 17 Oct 2025, 08:28 | 0.42 | 0.42 mg/l |
| 5 Sep 2025, 12:07 | 0.2 | 0.2 mg/l |
| 22 Aug 2025, 11:48 | 0.51 | 0.51 mg/l |
| 10 Jul 2025, 09:21 | 0.3 | 0.3 mg/l |
| 9 Jun 2025, 14:23 | 0.017 | 0.017 mg/l |
| 7 May 2025, 13:18 | 0.58 | 0.58 mg/l |
| 1 Apr 2025, 12:13 | 0.21 | 0.21 mg/l |
| 6 Mar 2025, 11:20 | 0.16 | 0.16 mg/l |
| 7 Feb 2025, 09:18 | 0.14 | 0.14 mg/l |
| 13 Jan 2025, 08:57 | 0.18 | 0.18 mg/l |
| 3 Dec 2024, 14:37 | 0.21 | 0.21 mg/l |
| 1 Nov 2024, 09:18 | 0.13 | 0.13 mg/l |
| 1 Oct 2024, 09:17 | 0.18 | 0.18 mg/l |
| 4 Sep 2024, 15:04 | 0.27 | 0.27 mg/l |
| 8 Aug 2024, 13:48 | 0.22 | 0.22 mg/l |
| 11 Jul 2024, 09:08 | 0.085 | 0.085 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
330 µS/cm
Sampled 1 Sep 2026, 30 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 08:56 | 330 | 330 µS/cm |
| 5 Aug 2026, 11:21 | 330 | 330 µS/cm |
| 20 Jul 2026, 09:45 | 306 | 306 µS/cm |
| 3 Jun 2026, 11:59 | 487 | 487 µS/cm |
| 5 May 2026, 09:08 | 360 | 360 µS/cm |
| 10 Apr 2026, 10:54 | 363 | 363 µS/cm |
| 23 Mar 2026, 08:15 | 406 | 406 µS/cm |
| 11 Feb 2026, 08:42 | 270 | 270 µS/cm |
| 22 Jan 2026, 12:30 | 246 | 246 µS/cm |
| 15 Dec 2025, 09:12 | 330 | 330 µS/cm |
| 25 Nov 2025, 11:43 | 289 | 289 µS/cm |
| 17 Oct 2025, 08:28 | 368 | 368 µS/cm |
| 5 Sep 2025, 12:07 | 206 | 206 µS/cm |
| 22 Aug 2025, 11:48 | 364 | 364 µS/cm |
| 10 Jul 2025, 09:21 | 273 | 273 µS/cm |
| 9 Jun 2025, 14:23 | 163 | 163 µS/cm |
| 7 May 2025, 13:18 | 522 | 522 µS/cm |
| 1 Apr 2025, 12:13 | 412 | 412 µS/cm |
| 6 Mar 2025, 11:20 | 445 | 445 µS/cm |
| 7 Feb 2025, 09:18 | 378 | 378 µS/cm |
| 13 Jan 2025, 08:57 | 480 | 480 µS/cm |
| 3 Dec 2024, 14:37 | 300 | 300 µS/cm |
| 1 Nov 2024, 09:18 | 441 | 441 µS/cm |
| 1 Oct 2024, 09:17 | 209 | 209 µS/cm |
| 4 Sep 2024, 15:04 | 292 | 292 µS/cm |
| 8 Aug 2024, 13:48 | 347 | 347 µS/cm |
| 11 Jul 2024, 09:08 | 180 | 180 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
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 27 | Jul 2024 – Sep 2026 | 79.1% 1 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Jul 2024 – Sep 2026 | 7.74 mg/l 1 Sep 2026 |
| Temperature of Water 0076 | River water | 27 | Jul 2024 – Sep 2026 | 16.3 °C 1 Sep 2026 |
| pH 0061 | River water | 27 | Jul 2024 – Sep 2026 | 7.81 1 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 27 | Jul 2024 – Sep 2026 | 0.14 mg/l 1 Sep 2026 |
| Nitrate as N 0117 | River water | 27 | Jul 2024 – Sep 2026 | 2.85 mg/l 1 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 27 | Jul 2024 – Sep 2026 | 0.29 mg/l 1 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Jul 2024 – Sep 2026 | 330 µS/cm 1 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 27 | Jul 2024 – Sep 2026 | 77 mg/l 1 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 27 | Jul 2024 – Sep 2026 | 0.00264 mg/l 1 Sep 2026 |
| Nitrite as N 0118 | River water | 27 | Jul 2024 – Sep 2026 | 0.055 mg/l 1 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 27 | Jul 2024 – Sep 2026 | 2.9 mg/l 1 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.