Tees at Barnard Castle
EA name: TEES AT BARNARD CASTLE
Environment Agency sampling point NE-45200011 · 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
- 29 May 2026, 08:354 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 18 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 404700, 516400As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Tees
- River, by the map
- River TeesPlaced on the river its name gives, 101 m from the line.
- Next gauge downstream
- Broken Scar On the River Tees · 29 km along the river
- Nearest gauge upstream
- Barnard Castle On the River Tees · 0.2 km along the river
- Why it was sampled
- Monitoring (national agency policy) (23 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.1%
Sampled 29 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 08:35 | 96.1 | 96.1% |
| 22 Apr 2026, 10:45 | 109.1 | 109.1% |
| 17 Mar 2026, 11:48 | 100.9 | 100.9% |
| 13 Feb 2026, 12:19 | 103.3 | 103.3% |
| 26 Jan 2026, 13:06 | 103.3 | 103.3% |
| 17 Dec 2025, 09:48 | 102.8 | 102.8% |
| 19 Nov 2025, 09:20 | 101.5 | 101.5% |
| 7 Oct 2025, 16:52 | 100.1 | 100.1% |
| 1 Sep 2025, 11:21 | 100.2 | 100.2% |
| 15 Aug 2025, 12:16 | 110.6 | 110.6% |
| 4 Jul 2025, 10:35 | 100.2 | 100.2% |
| 18 Jun 2025, 10:29 | 105.8 | 105.8% |
| 30 May 2025, 10:59 | 102.8 | 102.8% |
| 4 Mar 2025, 10:25 | 105.9 | 105.9% |
| 3 Feb 2025, 10:33 | 96.9 | 96.9% |
| 20 Jan 2025, 11:13 | 102.8 | 102.8% |
| 3 Dec 2024, 11:28 | 102.9 | 102.9% |
| 18 Nov 2024, 13:17 | 102.3 | 102.3% |
| 14 Oct 2024, 12:25 | 104.1 | 104.1% |
| 20 Sep 2024, 12:20 | 101.2 | 101.2% |
| 19 Aug 2024, 11:33 | 108.7 | 108.7% |
| 22 Jul 2024, 12:50 | 101.8 | 101.8% |
| 18 Jun 2024, 09:03 | 101.4 | 101.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.4 mg/l
Sampled 29 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 08:35 | 9.4 | 9.4 mg/l |
| 22 Apr 2026, 10:45 | 12.3 | 12.3 mg/l |
| 17 Mar 2026, 11:48 | 12 | 12 mg/l |
| 13 Feb 2026, 12:19 | 13.8 | 13.8 mg/l |
| 26 Jan 2026, 13:06 | 13.6 | 13.6 mg/l |
| 17 Dec 2025, 09:48 | 13 | 13 mg/l |
| 19 Nov 2025, 09:20 | 13.2 | 13.2 mg/l |
| 7 Oct 2025, 16:52 | 10.8 | 10.8 mg/l |
| 1 Sep 2025, 11:21 | 10.1 | 10.1 mg/l |
| 15 Aug 2025, 12:16 | 9.99 | 9.99 mg/l |
| 4 Jul 2025, 10:35 | 10.2 | 10.2 mg/l |
| 18 Jun 2025, 10:29 | 10.2 | 10.2 mg/l |
| 30 May 2025, 10:59 | 10.3 | 10.3 mg/l |
| 4 Mar 2025, 10:25 | 13 | 13 mg/l |
| 3 Feb 2025, 10:33 | 12.6 | 12.6 mg/l |
| 20 Jan 2025, 11:13 | 13.8 | 13.8 mg/l |
| 3 Dec 2024, 11:28 | 13.2 | 13.2 mg/l |
| 18 Nov 2024, 13:17 | 13.5 | 13.5 mg/l |
| 14 Oct 2024, 12:25 | 12.4 | 12.4 mg/l |
| 20 Sep 2024, 12:20 | 10.5 | 10.5 mg/l |
| 19 Aug 2024, 11:33 | 11 | 11 mg/l |
| 22 Jul 2024, 12:50 | 9.9 | 9.9 mg/l |
| 18 Jun 2024, 09:03 | 10.5 | 10.5 mg/l |
Water temperature
code 0076 · °C
16.3 °C
Sampled 29 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 08:35 | 16.3 | 16.3 °C |
| 22 Apr 2026, 10:45 | 9.9 | 9.9 °C |
| 17 Mar 2026, 11:48 | 7.8 | 7.8 °C |
| 13 Feb 2026, 12:19 | 3.2 | 3.2 °C |
| 26 Jan 2026, 13:06 | 3.9 | 3.9 °C |
| 17 Dec 2025, 09:48 | 5.4 | 5.4 °C |
| 19 Nov 2025, 09:20 | 4.3 | 4.3 °C |
| 7 Oct 2025, 16:52 | 12 | 12 °C |
| 1 Sep 2025, 11:21 | 14.8 | 14.8 °C |
| 15 Aug 2025, 12:16 | 20.2 | 20.2 °C |
| 4 Jul 2025, 10:35 | 14.5 | 14.5 °C |
| 18 Jun 2025, 10:29 | 16.8 | 16.8 °C |
| 30 May 2025, 10:59 | 15.2 | 15.2 °C |
| 4 Mar 2025, 10:25 | 6.5 | 6.5 °C |
| 3 Feb 2025, 10:33 | 4.3 | 4.3 °C |
| 20 Jan 2025, 11:13 | 3 | 3 °C |
| 3 Dec 2024, 11:28 | 4.7 | 4.7 °C |
| 18 Nov 2024, 13:17 | 3.6 | 3.6 °C |
| 14 Oct 2024, 12:25 | 7.6 | 7.6 °C |
| 20 Sep 2024, 12:20 | 13.4 | 13.4 °C |
| 19 Aug 2024, 11:33 | 14.6 | 14.6 °C |
| 22 Jul 2024, 12:50 | 16.6 | 16.6 °C |
| 18 Jun 2024, 09:03 | 13.5 | 13.5 °C |
pH
code 0061
7.78
Sampled 29 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 08:35 | 7.78 | 7.78 |
| 22 Apr 2026, 10:45 | 8.15 | 8.15 |
| 17 Mar 2026, 11:48 | 7.87 | 7.87 |
| 13 Feb 2026, 12:19 | 7.81 | 7.81 |
| 26 Jan 2026, 13:06 | 7.5 | 7.5 |
| 17 Dec 2025, 09:48 | 8.07 | 8.07 |
| 19 Nov 2025, 09:20 | 8.02 | 8.02 |
| 7 Oct 2025, 16:52 | 7.85 | 7.85 |
| 1 Sep 2025, 11:21 | 8.05 | 8.05 |
| 15 Aug 2025, 12:16 | 8.21 | 8.21 |
| 4 Jul 2025, 10:35 | 7.83 | 7.83 |
| 18 Jun 2025, 10:29 | 8 | 8 |
| 30 May 2025, 10:59 | 7.84 | 7.84 |
| 4 Mar 2025, 10:25 | 8.03 | 8.03 |
| 3 Feb 2025, 10:33 | 8.11 | 8.11 |
| 20 Jan 2025, 11:13 | 7.96 | 7.96 |
| 3 Dec 2024, 11:28 | 7.9 | 7.9 |
| 18 Nov 2024, 13:17 | 7.97 | 7.97 |
| 14 Oct 2024, 12:25 | 8.31 | 8.31 |
| 20 Sep 2024, 12:20 | 7.94 | 7.94 |
| 19 Aug 2024, 11:33 | 8.19 | 8.19 |
| 22 Jul 2024, 12:50 | 7.92 | 7.92 |
| 18 Jun 2024, 09:03 | 8.4 | 8.4 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 29 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 08:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Apr 2026, 10:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Mar 2026, 11:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Feb 2026, 12:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Jan 2026, 13:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Dec 2025, 09:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Nov 2025, 09:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Oct 2025, 16:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Sep 2025, 11:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Aug 2025, 12:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Jul 2025, 10:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jun 2025, 10:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 May 2025, 10:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2025, 10:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Feb 2025, 10:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jan 2025, 11:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Dec 2024, 11:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Nov 2024, 13:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2024, 12:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Sep 2024, 12:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 11:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jul 2024, 12:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jun 2024, 09:03 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.236 mg/l
Sampled 29 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 08:35 | 0.236 | 0.236 mg/l |
| 22 Apr 2026, 10:45 | 0.306 | 0.306 mg/l |
| 17 Mar 2026, 11:48 | 0.346 | 0.346 mg/l |
| 13 Feb 2026, 12:19 | 0.776 | 0.776 mg/l |
| 26 Jan 2026, 13:06 | 0.806 | 0.806 mg/l |
| 17 Dec 2025, 09:48 | 2.5 | 2.5 mg/l |
| 19 Nov 2025, 09:20 | 0.576 | 0.576 mg/l |
| 7 Oct 2025, 16:52 | 0.236 | 0.236 mg/l |
| 1 Sep 2025, 11:21 | 0.226 | 0.226 mg/l |
| 15 Aug 2025, 12:16 | 0.216 | 0.216 mg/l |
| 4 Jul 2025, 10:35 | 0.236 | 0.236 mg/l |
| 18 Jun 2025, 10:29 | 0.256 | 0.256 mg/l |
| 30 May 2025, 10:59 | 0.276 | 0.276 mg/l |
| 4 Mar 2025, 10:25 | 0.426 | 0.426 mg/l |
| 3 Feb 2025, 10:33 | 0.506 | 0.506 mg/l |
| 20 Jan 2025, 11:13 | 0.536 | 0.536 mg/l |
| 3 Dec 2024, 11:28 | 0.246 | 0.246 mg/l |
| 18 Nov 2024, 13:17 | 0.286 | 0.286 mg/l |
| 14 Oct 2024, 12:25 | 0.446 | 0.446 mg/l |
| 20 Sep 2024, 12:20 | <0.196 | below 0.196 mg/l (not detected above this) |
| 19 Aug 2024, 11:33 | <0.196 | below 0.196 mg/l (not detected above this) |
| 22 Jul 2024, 12:50 | <0.196 | below 0.196 mg/l (not detected above this) |
| 18 Jun 2024, 09:03 | 0.256 | 0.256 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.01 mg/l (not detected above this)
Sampled 29 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 08:35 | <0.01 | below 0.01 mg/l (not detected above this) |
| 22 Apr 2026, 10:45 | <0.01 | below 0.01 mg/l (not detected above this) |
| 17 Mar 2026, 11:48 | <0.01 | below 0.01 mg/l (not detected above this) |
| 13 Feb 2026, 12:19 | 0.012 | 0.012 mg/l |
| 26 Jan 2026, 13:06 | 0.01 | 0.01 mg/l |
| 17 Dec 2025, 09:48 | 0.021 | 0.021 mg/l |
| 19 Nov 2025, 09:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 7 Oct 2025, 16:52 | <0.01 | below 0.01 mg/l (not detected above this) |
| 1 Sep 2025, 11:21 | <0.01 | below 0.01 mg/l (not detected above this) |
| 15 Aug 2025, 12:16 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Jul 2025, 10:35 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 Jun 2025, 10:29 | <0.01 | below 0.01 mg/l (not detected above this) |
| 30 May 2025, 10:59 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Mar 2025, 10:25 | <0.01 | below 0.01 mg/l (not detected above this) |
| 3 Feb 2025, 10:33 | <0.01 | below 0.01 mg/l (not detected above this) |
| 20 Jan 2025, 11:13 | <0.01 | below 0.01 mg/l (not detected above this) |
| 3 Dec 2024, 11:28 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 Nov 2024, 13:17 | <0.01 | below 0.01 mg/l (not detected above this) |
| 14 Oct 2024, 12:25 | <0.01 | below 0.01 mg/l (not detected above this) |
| 20 Sep 2024, 12:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 19 Aug 2024, 11:33 | <0.01 | below 0.01 mg/l (not detected above this) |
| 22 Jul 2024, 12:50 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 Jun 2024, 09:03 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
136 µS/cm
Sampled 29 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 08:35 | 136 | 136 µS/cm |
| 22 Apr 2026, 10:45 | 137 | 137 µS/cm |
| 17 Mar 2026, 11:48 | 95 | 95 µS/cm |
| 13 Feb 2026, 12:19 | 142 | 142 µS/cm |
| 26 Jan 2026, 13:06 | 115 | 115 µS/cm |
| 17 Dec 2025, 09:48 | 358 | 358 µS/cm |
| 19 Nov 2025, 09:20 | 163 | 163 µS/cm |
| 7 Oct 2025, 16:52 | 113 | 113 µS/cm |
| 1 Sep 2025, 11:21 | 119 | 119 µS/cm |
| 15 Aug 2025, 12:16 | 113 | 113 µS/cm |
| 4 Jul 2025, 10:35 | 115 | 115 µS/cm |
| 18 Jun 2025, 10:29 | 140 | 140 µS/cm |
| 30 May 2025, 10:59 | 110 | 110 µS/cm |
| 4 Mar 2025, 10:25 | 163 | 163 µS/cm |
| 3 Feb 2025, 10:33 | 161 | 161 µS/cm |
| 20 Jan 2025, 11:13 | 158 | 158 µS/cm |
| 3 Dec 2024, 11:28 | 131 | 131 µS/cm |
| 18 Nov 2024, 13:17 | 141 | 141 µS/cm |
| 14 Oct 2024, 12:25 | 188 | 188 µS/cm |
| 20 Sep 2024, 12:20 | 119 | 119 µS/cm |
| 19 Aug 2024, 11:33 | 123 | 123 µS/cm |
| 22 Jul 2024, 12:50 | 118 | 118 µS/cm |
| 18 Jun 2024, 09:03 | 566 | 566 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 | 96.1% 29 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 23 | Jun 2024 – May 2026 | 9.4 mg/l 29 May 2026 |
| Temperature of Water 0076 | River water | 23 | Jun 2024 – May 2026 | 16.3 °C 29 May 2026 |
| pH 0061 | River water | 23 | Jun 2024 – May 2026 | 7.78 29 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 23 | Jun 2024 – May 2026 | below 0.03 mg/l 29 May 2026 |
| Nitrate as N 0117 | River water | 23 | Jun 2024 – May 2026 | 0.236 mg/l 29 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 23 | Jun 2024 – May 2026 | below 0.01 mg/l 29 May 2026 |
| Conductivity at 25 C 0077 | River water | 23 | Jun 2024 – May 2026 | 136 µS/cm 29 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 23 | Jun 2024 – May 2026 | 52 mg/l 29 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 23 | Jun 2024 – May 2026 | below 0.00053 mg/l 29 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | 1.2 mg/l 29 May 2026 |
| Nitrite as N 0118 | River water | 23 | Jun 2024 – May 2026 | below 0.004 mg/l 29 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 23 | Jun 2024 – May 2026 | 0.24 mg/l 29 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.