River Tamar at Buses Bridge
EA name: RIVER TAMAR AT BUSES BRIDGE
Environment Agency sampling point SW-91210355 · 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
- 8 Sep 2026, 10:5523 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 22 since 9 Oct 2023 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 228080, 113380As published, to the nearest 10 m. Open in a map
- River, by its own name
- Tamar
- River, by the map
- River TamarPlaced on the river its name gives, 0 m from the line.
- Next gauge downstream
- Tamarstone Bridge On the River Tamar · 13 km along the riverTamarstone Bridge 13 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (13 samples)
Planned investigation (local monitoring) (8 samples)
Unplanned reactive monitoring (pollution incidents) (1 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
93.4%
Sampled 8 Sep 2026, 23 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 10:55 | 93.4 | 93.4% |
| 17 Aug 2026, 10:43 | 80.5 | 80.5% |
| 17 Jul 2026, 12:09 | 88.8 | 88.8% |
| 8 Jun 2026, 12:58 | 96.7 | 96.7% |
| 8 May 2026, 11:04 | 97.2 | 97.2% |
| 30 Apr 2026, 11:36 | 101 | 101% |
| 3 Dec 2024, 12:01 | 96.9 | 96.9% |
| 13 Nov 2024, 11:24 | 96.5 | 96.5% |
| 23 Oct 2024, 10:43 | 97.4 | 97.4% |
| 10 Sep 2024, 10:54 | 98.6 | 98.6% |
| 5 Aug 2024, 11:19 | 95.1 | 95.1% |
| 11 Jul 2024, 14:37 | 96.5 | 96.5% |
| 3 Jun 2024, 11:13 | 96.8 | 96.8% |
| 7 Mar 2024, 13:40 | 94.2 | 94.2% |
| 7 Mar 2024, 12:00 | 94.2 | 94.2% |
| 19 Feb 2024, 11:12 | 96.4 | 96.4% |
| 24 Jan 2024, 11:10 | 97.9 | 97.9% |
| 9 Jan 2024, 12:57 | 98.1 | 98.1% |
| 13 Dec 2023, 12:03 | 98.7 | 98.7% |
| 7 Nov 2023, 12:04 | 97.3 | 97.3% |
| 25 Oct 2023, 10:00 | 95.6 | 95.6% |
| 9 Oct 2023, 10:59 | 94.3 | 94.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.46 mg/l
Sampled 8 Sep 2026, 23 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 10:55 | 9.46 | 9.46 mg/l |
| 17 Aug 2026, 10:43 | 7.84 | 7.84 mg/l |
| 17 Jul 2026, 12:09 | 8.56 | 8.56 mg/l |
| 8 Jun 2026, 12:58 | 10.1 | 10.1 mg/l |
| 8 May 2026, 11:04 | 10.5 | 10.5 mg/l |
| 30 Apr 2026, 11:36 | 10.9 | 10.9 mg/l |
| 3 Dec 2024, 12:01 | 11.1 | 11.1 mg/l |
| 13 Nov 2024, 11:24 | 11.2 | 11.2 mg/l |
| 23 Oct 2024, 10:43 | 10.6 | 10.6 mg/l |
| 10 Sep 2024, 10:54 | 10.2 | 10.2 mg/l |
| 5 Aug 2024, 11:19 | 9.44 | 9.44 mg/l |
| 11 Jul 2024, 14:37 | 9.83 | 9.83 mg/l |
| 3 Jun 2024, 11:13 | 10 | 10 mg/l |
| 7 Mar 2024, 13:40 | 11.1 | 11.1 mg/l |
| 19 Feb 2024, 11:12 | 10.8 | 10.8 mg/l |
| 24 Jan 2024, 11:10 | 11.4 | 11.4 mg/l |
| 9 Jan 2024, 12:57 | 11.9 | 11.9 mg/l |
| 13 Dec 2023, 12:03 | 11.3 | 11.3 mg/l |
| 7 Nov 2023, 12:04 | 10.8 | 10.8 mg/l |
| 25 Oct 2023, 10:00 | 10.5 | 10.5 mg/l |
| 9 Oct 2023, 10:59 | 10 | 10 mg/l |
Water temperature
code 0076 · °C
14.7 °C
Sampled 8 Sep 2026, 23 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 10:55 | 14.7 | 14.7 °C |
| 17 Aug 2026, 10:43 | 16.5 | 16.5 °C |
| 17 Jul 2026, 12:09 | 17 | 17 °C |
| 8 Jun 2026, 12:58 | 13.1 | 13.1 °C |
| 8 May 2026, 11:04 | 11.7 | 11.7 °C |
| 30 Apr 2026, 11:36 | 11.7 | 11.7 °C |
| 3 Dec 2024, 12:01 | 9.3 | 9.3 °C |
| 13 Nov 2024, 11:24 | 8.8 | 8.8 °C |
| 23 Oct 2024, 10:43 | 11.5 | 11.5 °C |
| 10 Sep 2024, 10:54 | 13.7 | 13.7 °C |
| 5 Aug 2024, 11:19 | 15.6 | 15.6 °C |
| 11 Jul 2024, 14:37 | 14.4 | 14.4 °C |
| 3 Jun 2024, 11:13 | 13.8 | 13.8 °C |
| 7 Mar 2024, 13:40 | 8.3 | 8.3 °C |
| 7 Mar 2024, 12:00 | 8.3 | 8.3 °C |
| 19 Feb 2024, 11:12 | 10.2 | 10.2 °C |
| 24 Jan 2024, 11:10 | 8.8 | 8.8 °C |
| 9 Jan 2024, 12:57 | 7.1 | 7.1 °C |
| 13 Dec 2023, 12:03 | 9.4 | 9.4 °C |
| 7 Nov 2023, 12:04 | 10.6 | 10.6 °C |
| 25 Oct 2023, 10:00 | 11 | 11 °C |
| 9 Oct 2023, 10:59 | 12.4 | 12.4 °C |
pH
code 0061
6.35
Sampled 8 Sep 2026, 23 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 10:55 | 6.35 | 6.35 |
| 17 Aug 2026, 10:43 | 7.34 | 7.34 |
| 17 Jul 2026, 12:09 | 7.36 | 7.36 |
| 8 Jun 2026, 12:58 | 7.2 | 7.2 |
| 8 May 2026, 11:04 | 7.38 | 7.38 |
| 30 Apr 2026, 11:36 | 7.32 | 7.32 |
| 3 Dec 2024, 12:01 | 6.82 | 6.82 |
| 13 Nov 2024, 11:24 | 7.22 | 7.22 |
| 23 Oct 2024, 10:43 | 7.01 | 7.01 |
| 10 Sep 2024, 10:54 | 7.56 | 7.56 |
| 5 Aug 2024, 11:19 | 7.13 | 7.13 |
| 11 Jul 2024, 14:37 | 7.29 | 7.29 |
| 3 Jun 2024, 11:13 | 7.53 | 7.53 |
| 7 Mar 2024, 13:40 | 7.03 | 7.03 |
| 7 Mar 2024, 12:00 | 7.03 | 7.03 |
| 19 Feb 2024, 11:12 | 6.93 | 6.93 |
| 24 Jan 2024, 11:10 | 7.24 | 7.24 |
| 9 Jan 2024, 12:57 | 7.54 | 7.54 |
| 13 Dec 2023, 12:03 | 6.99 | 6.99 |
| 7 Nov 2023, 12:04 | 7.67 | 7.67 |
| 25 Oct 2023, 10:00 | 7.09 | 7.09 |
| 9 Oct 2023, 10:59 | 7.12 | 7.12 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.052 mg/l
Sampled 8 Sep 2026, 23 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 10:55 | 0.052 | 0.052 mg/l |
| 17 Aug 2026, 10:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jul 2026, 12:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jun 2026, 12:58 | 0.16 | 0.16 mg/l |
| 8 May 2026, 11:04 | 0.048 | 0.048 mg/l |
| 30 Apr 2026, 11:36 | 0.061 | 0.061 mg/l |
| 3 Dec 2024, 12:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Nov 2024, 11:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Oct 2024, 10:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Sep 2024, 10:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Aug 2024, 11:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Jul 2024, 14:37 | 0.031 | 0.031 mg/l |
| 3 Jun 2024, 11:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Mar 2024, 13:40 | 0.058 | 0.058 mg/l |
| 7 Mar 2024, 12:00 | <0.5 | below 0.5 mg/l (not detected above this) |
| 19 Feb 2024, 11:12 | 0.39 | 0.39 mg/l |
| 24 Jan 2024, 11:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jan 2024, 12:57 | 0.034 | 0.034 mg/l |
| 13 Dec 2023, 12:03 | 0.082 | 0.082 mg/l |
| 7 Nov 2023, 12:04 | 0.053 | 0.053 mg/l |
| 25 Oct 2023, 10:00 | 0.033 | 0.033 mg/l |
| 9 Oct 2023, 10:59 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.38 mg/l
Sampled 8 Sep 2026, 23 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 10:55 | 1.38 | 1.38 mg/l |
| 17 Aug 2026, 10:43 | 1.5 | 1.5 mg/l |
| 17 Jul 2026, 12:09 | 2.1 | 2.1 mg/l |
| 8 Jun 2026, 12:58 | 2.08 | 2.08 mg/l |
| 8 May 2026, 11:04 | 2.28 | 2.28 mg/l |
| 30 Apr 2026, 11:36 | 2.29 | 2.29 mg/l |
| 13 Nov 2024, 11:24 | 2.9 | 2.9 mg/l |
| 23 Oct 2024, 10:43 | 3.1 | 3.1 mg/l |
| 10 Sep 2024, 10:54 | 3.5 | 3.5 mg/l |
| 5 Aug 2024, 11:19 | 2.7 | 2.7 mg/l |
| 11 Jul 2024, 14:37 | 2.6 | 2.6 mg/l |
| 3 Jun 2024, 11:13 | 2.89 | 2.89 mg/l |
| 7 Mar 2024, 13:40 | 3.49 | 3.49 mg/l |
| 19 Feb 2024, 11:12 | 3.38 | 3.38 mg/l |
| 24 Jan 2024, 11:10 | 2.59 | 2.59 mg/l |
| 9 Jan 2024, 12:57 | 4.19 | 4.19 mg/l |
| 13 Dec 2023, 12:03 | 3.89 | 3.89 mg/l |
| 7 Nov 2023, 12:04 | 3.39 | 3.39 mg/l |
| 25 Oct 2023, 10:00 | 2.39 | 2.39 mg/l |
| 9 Oct 2023, 10:59 | 3.2 | 3.2 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.059 mg/l
Sampled 8 Sep 2026, 23 days ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 10:55 | 0.059 | 0.059 mg/l |
| 17 Aug 2026, 10:43 | 0.027 | 0.027 mg/l |
| 17 Jul 2026, 12:09 | 0.014 | 0.014 mg/l |
| 8 Jun 2026, 12:58 | 0.12 | 0.12 mg/l |
| 8 May 2026, 11:04 | 0.032 | 0.032 mg/l |
| 30 Apr 2026, 11:36 | 0.023 | 0.023 mg/l |
| 13 Nov 2024, 11:24 | 0.016 | 0.016 mg/l |
| 23 Oct 2024, 10:43 | 0.019 | 0.019 mg/l |
| 10 Sep 2024, 10:54 | 0.028 | 0.028 mg/l |
| 5 Aug 2024, 11:19 | 0.029 | 0.029 mg/l |
| 11 Jul 2024, 14:37 | 0.037 | 0.037 mg/l |
| 3 Jun 2024, 11:13 | 0.028 | 0.028 mg/l |
| 7 Mar 2024, 13:40 | 0.017 | 0.017 mg/l |
| 7 Mar 2024, 12:00 | <0.5 | below 0.5 mg/l (not detected above this) |
| 19 Feb 2024, 11:12 | 0.065 | 0.065 mg/l |
| 24 Jan 2024, 11:10 | 0.021 | 0.021 mg/l |
| 9 Jan 2024, 12:57 | 0.013 | 0.013 mg/l |
| 13 Dec 2023, 12:03 | 0.031 | 0.031 mg/l |
| 7 Nov 2023, 12:04 | 0.022 | 0.022 mg/l |
| 25 Oct 2023, 10:00 | 0.044 | 0.044 mg/l |
| 9 Oct 2023, 10:59 | 0.019 | 0.019 mg/l |
Turbidity
code 6396 · NTU
3.5 NTU
Sampled 7 Mar 2024, 2.6 years ago · 1 result banked
Every result (1)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2024, 12:00 | 3.5 | 3.5 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
221 µS/cm
Sampled 8 Sep 2026, 23 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Sep 2026, 10:55 | 221 | 221 µS/cm |
| 17 Aug 2026, 10:43 | 198 | 198 µS/cm |
| 17 Jul 2026, 12:09 | 187 | 187 µS/cm |
| 8 Jun 2026, 12:58 | 157 | 157 µS/cm |
| 8 May 2026, 11:04 | 172 | 172 µS/cm |
| 30 Apr 2026, 11:36 | 170 | 170 µS/cm |
| 3 Dec 2024, 12:01 | 167 | 167 µS/cm |
| 13 Nov 2024, 11:24 | 171 | 171 µS/cm |
| 23 Oct 2024, 10:43 | 160 | 160 µS/cm |
| 10 Sep 2024, 10:54 | 180 | 180 µS/cm |
| 5 Aug 2024, 11:19 | 179 | 179 µS/cm |
| 11 Jul 2024, 14:37 | 177 | 177 µS/cm |
| 3 Jun 2024, 11:13 | 178 | 178 µS/cm |
| 7 Mar 2024, 13:40 | 160 | 160 µS/cm |
| 7 Mar 2024, 12:00 | 160 | 160 µS/cm |
| 19 Feb 2024, 11:12 | 167 | 167 µS/cm |
| 24 Jan 2024, 11:10 | 170 | 170 µS/cm |
| 9 Jan 2024, 12:57 | 139 | 139 µS/cm |
| 13 Dec 2023, 12:03 | 167 | 167 µS/cm |
| 7 Nov 2023, 12:04 | 160 | 160 µS/cm |
| 25 Oct 2023, 10:00 | 156 | 156 µS/cm |
| 9 Oct 2023, 10:59 | 172 | 172 µS/cm |
Everything measured here
18 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 18 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 22 | Oct 2023 – Sep 2026 | 93.4% 8 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 21 | Oct 2023 – Sep 2026 | 9.46 mg/l 8 Sep 2026 |
| Temperature of Water 0076 | River water | 22 | Oct 2023 – Sep 2026 | 14.7 °C 8 Sep 2026 |
| pH 0061 | River water | 22 | Oct 2023 – Sep 2026 | 6.35 8 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Oct 2023 – Sep 2026 | 0.052 mg/l 8 Sep 2026 |
| Nitrate as N 0117 | River water | 20 | Oct 2023 – Sep 2026 | 1.38 mg/l 8 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Oct 2023 – Sep 2026 | 0.059 mg/l 8 Sep 2026 |
| Turbidity 6396 | River water | 1 | Mar 2024 – Mar 2024 | 3.5 NTU 7 Mar 2024 |
| Conductivity at 25 C 0077 | River water | 22 | Oct 2023 – Sep 2026 | 221 µS/cm 8 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Oct 2023 – Sep 2026 | 37 mg/l 8 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Oct 2023 – Sep 2026 | 0.00003 mg/l 8 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 1 | Mar 2024 – Mar 2024 | 1.5 mg/l 7 Mar 2024 |
| Chloride 0172 | River water | 1 | Mar 2024 – Mar 2024 | 20 mg/l 7 Mar 2024 |
| National Grid Reference : Whole : Field report 7434 | River water | 1 | Mar 2024 – Mar 2024 | 1 unitless value 7 Mar 2024 |
| Nitrite as N 0118 | River water | 21 | Oct 2023 – Sep 2026 | 0.017 mg/l 8 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 21 | Oct 2023 – Sep 2026 | 1.4 mg/l 8 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 1 | Mar 2024 – Mar 2024 | 4.8 mg/l 7 Mar 2024 |
| Visible oil or grease, significant trace: Present/Not found (1/0) 0664 | River water | 1 | Mar 2024 – Mar 2024 | Present 7 Mar 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.