Bristol Frome at Tubbs Bottom
EA name: BRISTOL FROME AT TUBBS BOTTOM (also listed as “RSN2178 BRISTOL FROME AT TUBBS BOTTOM”)
Environment Agency sampling point SW-RSN2178 · 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
- 2 Dec 2025, 10:2710 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 2 Jan 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 367751, 182973As published, to the nearest 1 m. Open in a map
- River, by its own name
- Bristol Frome
- River, by the map
- River FromePlaced on a river whose name partly matches its own, 9 m from the line.
- Next gauge downstream
- Frampton Cotterell On the Bristol Frome · 2.3 km along the river
- Nearest gauge upstream
- Tubbs Bottom On the Bristol Frome · 0.2 km along the river
- Why it was sampled
- Monitoring (national agency policy) (23 samples)
1 visit found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.4%
Sampled 2 Dec 2025, 10 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:27 | 96.4 | 96.4% |
| 12 Nov 2025, 10:57 | 92.3 | 92.3% |
| 9 Oct 2025, 12:42 | 89.6 | 89.6% |
| 4 Sep 2025, 12:04 | 94.9 | 94.9% |
| 13 Aug 2025, 10:01 | 38.5 | 38.5% |
| 25 Jun 2025, 12:20 | 97.3 | 97.3% |
| 13 May 2025, 09:57 | 80.6 | 80.6% |
| 4 Mar 2025, 10:59 | 102.8 | 102.8% |
| 3 Feb 2025, 13:57 | 98 | 98% |
| 8 Jan 2025, 12:22 | 98.3 | 98.3% |
| 2 Dec 2024, 10:56 | 95.4 | 95.4% |
| 11 Nov 2024, 09:51 | 93.4 | 93.4% |
| 4 Oct 2024, 10:42 | 96.5 | 96.5% |
| 3 Sep 2024, 10:20 | 82.5 | 82.5% |
| 7 Aug 2024, 14:22 | 62.7 | 62.7% |
| 1 Jul 2024, 10:22 | 76.3 | 76.3% |
| 10 Jun 2024, 10:01 | 99.6 | 99.6% |
| 10 May 2024, 13:18 | 108.2 | 108.2% |
| 18 Apr 2024, 12:41 | 104.2 | 104.2% |
| 8 Mar 2024, 12:54 | 100.9 | 100.9% |
| 6 Feb 2024, 11:48 | 95.8 | 95.8% |
| 2 Jan 2024, 14:03 | 94.4 | 94.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.1 mg/l
Sampled 2 Dec 2025, 10 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:27 | 11.1 | 11.1 mg/l |
| 12 Nov 2025, 10:57 | 9.66 | 9.66 mg/l |
| 9 Oct 2025, 12:42 | 9.54 | 9.54 mg/l |
| 4 Sep 2025, 12:04 | 9.4 | 9.4 mg/l |
| 13 Aug 2025, 10:01 | 3.66 | 3.66 mg/l |
| 25 Jun 2025, 12:20 | 9.18 | 9.18 mg/l |
| 13 May 2025, 09:57 | 8.45 | 8.45 mg/l |
| 4 Mar 2025, 10:59 | 13 | 13 mg/l |
| 3 Feb 2025, 13:57 | 11.6 | 11.6 mg/l |
| 8 Jan 2025, 12:22 | 12.1 | 12.1 mg/l |
| 2 Dec 2024, 10:56 | 10.8 | 10.8 mg/l |
| 11 Nov 2024, 09:51 | 10.4 | 10.4 mg/l |
| 4 Oct 2024, 10:42 | 10.7 | 10.7 mg/l |
| 3 Sep 2024, 10:20 | 7.95 | 7.95 mg/l |
| 7 Aug 2024, 14:22 | 6.07 | 6.07 mg/l |
| 1 Jul 2024, 10:22 | 7.72 | 7.72 mg/l |
| 10 Jun 2024, 10:01 | 10.6 | 10.6 mg/l |
| 10 May 2024, 13:18 | 10.9 | 10.9 mg/l |
| 18 Apr 2024, 12:41 | 11.7 | 11.7 mg/l |
| 8 Mar 2024, 12:54 | 11.9 | 11.9 mg/l |
| 6 Feb 2024, 11:48 | 10.8 | 10.8 mg/l |
| 2 Jan 2024, 14:03 | 10.6 | 10.6 mg/l |
Water temperature
code 0076 · °C
8.9 °C
Sampled 2 Dec 2025, 10 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:27 | 8.9 | 8.9 °C |
| 12 Nov 2025, 10:57 | 13.2 | 13.2 °C |
| 9 Oct 2025, 12:42 | 12.4 | 12.4 °C |
| 4 Sep 2025, 12:04 | 15.7 | 15.7 °C |
| 13 Aug 2025, 10:01 | 17.6 | 17.6 °C |
| 25 Jun 2025, 12:20 | 18 | 18 °C |
| 13 May 2025, 09:57 | 13.1 | 13.1 °C |
| 4 Mar 2025, 10:59 | 5.4 | 5.4 °C |
| 3 Feb 2025, 13:57 | 8 | 8 °C |
| 8 Jan 2025, 12:22 | 6.5 | 6.5 °C |
| 2 Dec 2024, 10:56 | 9.6 | 9.6 °C |
| 11 Nov 2024, 09:51 | 10.6 | 10.6 °C |
| 4 Oct 2024, 10:42 | 10.7 | 10.7 °C |
| 3 Sep 2024, 10:20 | 17 | 17 °C |
| 7 Aug 2024, 14:22 | 16.8 | 16.8 °C |
| 1 Jul 2024, 10:22 | 14.7 | 14.7 °C |
| 10 Jun 2024, 10:01 | 12.6 | 12.6 °C |
| 10 May 2024, 13:18 | 14.8 | 14.8 °C |
| 18 Apr 2024, 12:41 | 10.2 | 10.2 °C |
| 8 Mar 2024, 12:54 | 8 | 8 °C |
| 6 Feb 2024, 11:48 | 10 | 10 °C |
| 2 Jan 2024, 14:03 | 10.2 | 10.2 °C |
pH
code 0061
7.88
Sampled 2 Dec 2025, 10 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:27 | 7.88 | 7.88 |
| 12 Nov 2025, 10:57 | 7.98 | 7.98 |
| 9 Oct 2025, 12:42 | 7.86 | 7.86 |
| 4 Sep 2025, 12:04 | 8.09 | 8.09 |
| 13 Aug 2025, 10:01 | 7.86 | 7.86 |
| 25 Jun 2025, 12:20 | 8.11 | 8.11 |
| 13 May 2025, 09:57 | 7.93 | 7.93 |
| 4 Mar 2025, 10:59 | 8.25 | 8.25 |
| 3 Feb 2025, 13:57 | 8.23 | 8.23 |
| 8 Jan 2025, 12:22 | 8.14 | 8.14 |
| 2 Dec 2024, 10:56 | 7.98 | 7.98 |
| 11 Nov 2024, 09:51 | 8.12 | 8.12 |
| 4 Oct 2024, 10:42 | 8.09 | 8.09 |
| 3 Sep 2024, 10:20 | 7.83 | 7.83 |
| 7 Aug 2024, 14:22 | 7.98 | 7.98 |
| 1 Jul 2024, 10:22 | 8.26 | 8.26 |
| 10 Jun 2024, 10:01 | 8.39 | 8.39 |
| 10 May 2024, 13:18 | 8.24 | 8.24 |
| 18 Apr 2024, 12:41 | 8.37 | 8.37 |
| 8 Mar 2024, 12:54 | 8.32 | 8.32 |
| 6 Feb 2024, 11:48 | 8.27 | 8.27 |
| 2 Jan 2024, 14:03 | 7.7 | 7.7 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 2 Dec 2025, 10 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Nov 2025, 10:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Oct 2025, 12:42 | 0.092 | 0.092 mg/l |
| 4 Sep 2025, 12:04 | 0.078 | 0.078 mg/l |
| 13 Aug 2025, 10:01 | 0.2 | 0.2 mg/l |
| 25 Jun 2025, 12:20 | 0.037 | 0.037 mg/l |
| 13 May 2025, 09:57 | 0.11 | 0.11 mg/l |
| 4 Mar 2025, 10:59 | 0.082 | 0.082 mg/l |
| 3 Feb 2025, 13:57 | 0.09 | 0.09 mg/l |
| 8 Jan 2025, 12:22 | 0.052 | 0.052 mg/l |
| 2 Dec 2024, 10:56 | 0.081 | 0.081 mg/l |
| 11 Nov 2024, 09:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Oct 2024, 10:42 | 0.047 | 0.047 mg/l |
| 3 Sep 2024, 10:20 | 0.6 | 0.6 mg/l |
| 7 Aug 2024, 14:22 | 0.17 | 0.17 mg/l |
| 1 Jul 2024, 10:22 | 0.066 | 0.066 mg/l |
| 10 Jun 2024, 10:01 | 0.032 | 0.032 mg/l |
| 10 May 2024, 13:18 | 0.052 | 0.052 mg/l |
| 18 Apr 2024, 12:41 | 0.16 | 0.16 mg/l |
| 8 Mar 2024, 12:54 | 0.16 | 0.16 mg/l |
| 6 Feb 2024, 11:48 | 0.18 | 0.18 mg/l |
| 2 Jan 2024, 14:03 | 0.065 | 0.065 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
4.49 mg/l
Sampled 2 Dec 2025, 10 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:27 | 4.49 | 4.49 mg/l |
| 12 Nov 2025, 10:57 | 6.29 | 6.29 mg/l |
| 9 Oct 2025, 12:42 | 1.46 | 1.46 mg/l |
| 4 Sep 2025, 12:04 | 1.27 | 1.27 mg/l |
| 13 Aug 2025, 10:01 | 0.327 | 0.327 mg/l |
| 25 Jun 2025, 12:20 | 1.08 | 1.08 mg/l |
| 13 May 2025, 09:57 | 1.47 | 1.47 mg/l |
| 4 Mar 2025, 10:59 | 2.49 | 2.49 mg/l |
| 3 Feb 2025, 13:57 | 2.49 | 2.49 mg/l |
| 8 Jan 2025, 12:22 | 3.99 | 3.99 mg/l |
| 2 Dec 2024, 10:56 | 2.29 | 2.29 mg/l |
| 11 Nov 2024, 09:51 | 2.28 | 2.28 mg/l |
| 4 Oct 2024, 10:42 | 3.19 | 3.19 mg/l |
| 3 Sep 2024, 10:20 | 1.91 | 1.91 mg/l |
| 7 Aug 2024, 14:22 | 1.37 | 1.37 mg/l |
| 1 Jul 2024, 10:22 | 0.612 | 0.612 mg/l |
| 10 Jun 2024, 10:01 | 1.79 | 1.79 mg/l |
| 10 May 2024, 13:18 | 2.08 | 2.08 mg/l |
| 18 Apr 2024, 12:41 | 2.38 | 2.38 mg/l |
| 8 Mar 2024, 12:54 | 3.09 | 3.09 mg/l |
| 6 Feb 2024, 11:48 | 2.67 | 2.67 mg/l |
| 2 Jan 2024, 14:03 | 2.49 | 2.49 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.097 mg/l
Sampled 2 Dec 2025, 10 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:27 | 0.097 | 0.097 mg/l |
| 12 Nov 2025, 10:57 | 0.1 | 0.1 mg/l |
| 9 Oct 2025, 12:42 | 0.14 | 0.14 mg/l |
| 4 Sep 2025, 12:04 | 0.09 | 0.09 mg/l |
| 13 Aug 2025, 10:01 | 0.08 | 0.08 mg/l |
| 25 Jun 2025, 12:20 | 0.12 | 0.12 mg/l |
| 13 May 2025, 09:57 | 0.043 | 0.043 mg/l |
| 4 Mar 2025, 10:59 | 0.038 | 0.038 mg/l |
| 3 Feb 2025, 13:57 | 0.061 | 0.061 mg/l |
| 8 Jan 2025, 12:22 | 0.054 | 0.054 mg/l |
| 2 Dec 2024, 10:56 | 0.079 | 0.079 mg/l |
| 11 Nov 2024, 09:51 | 0.055 | 0.055 mg/l |
| 4 Oct 2024, 10:42 | 0.057 | 0.057 mg/l |
| 3 Sep 2024, 10:20 | 0.24 | 0.24 mg/l |
| 7 Aug 2024, 14:22 | 0.11 | 0.11 mg/l |
| 1 Jul 2024, 10:22 | 0.033 | 0.033 mg/l |
| 10 Jun 2024, 10:01 | 0.048 | 0.048 mg/l |
| 10 May 2024, 13:18 | 0.06 | 0.06 mg/l |
| 18 Apr 2024, 12:41 | 0.035 | 0.035 mg/l |
| 8 Mar 2024, 12:54 | 0.052 | 0.052 mg/l |
| 6 Feb 2024, 11:48 | 0.061 | 0.061 mg/l |
| 2 Jan 2024, 14:03 | 0.08 | 0.08 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
451 µS/cm
Sampled 2 Dec 2025, 10 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Dec 2025, 10:27 | 451 | 451 µS/cm |
| 12 Nov 2025, 10:57 | 433 | 433 µS/cm |
| 9 Oct 2025, 12:42 | 757 | 757 µS/cm |
| 4 Sep 2025, 12:04 | 506 | 506 µS/cm |
| 13 Aug 2025, 10:01 | 630 | 630 µS/cm |
| 25 Jun 2025, 12:20 | 705 | 705 µS/cm |
| 13 May 2025, 09:57 | 741 | 741 µS/cm |
| 4 Mar 2025, 10:59 | 686 | 686 µS/cm |
| 3 Feb 2025, 13:57 | 655 | 655 µS/cm |
| 8 Jan 2025, 12:22 | 596 | 596 µS/cm |
| 2 Dec 2024, 10:56 | 553 | 553 µS/cm |
| 11 Nov 2024, 09:51 | 704 | 704 µS/cm |
| 4 Oct 2024, 10:42 | 627 | 627 µS/cm |
| 3 Sep 2024, 10:20 | 411 | 411 µS/cm |
| 7 Aug 2024, 14:22 | 696 | 696 µS/cm |
| 1 Jul 2024, 10:22 | 723 | 723 µS/cm |
| 10 Jun 2024, 10:01 | 736 | 736 µS/cm |
| 10 May 2024, 13:18 | 661 | 661 µS/cm |
| 18 Apr 2024, 12:41 | 687 | 687 µS/cm |
| 8 Mar 2024, 12:54 | 664 | 664 µS/cm |
| 6 Feb 2024, 11:48 | 702 | 702 µS/cm |
| 2 Jan 2024, 14:03 | 386 | 386 µS/cm |
Everything measured here
20 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 20 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 22 | Jan 2024 – Dec 2025 | 96.4% 2 Dec 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Jan 2024 – Dec 2025 | 11.1 mg/l 2 Dec 2025 |
| Temperature of Water 0076 | River water | 22 | Jan 2024 – Dec 2025 | 8.9 °C 2 Dec 2025 |
| pH 0061 | River water | 22 | Jan 2024 – Dec 2025 | 7.88 2 Dec 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Jan 2024 – Dec 2025 | below 0.03 mg/l 2 Dec 2025 |
| Nitrate as N 0117 | River water | 22 | Jan 2024 – Dec 2025 | 4.49 mg/l 2 Dec 2025 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Jan 2024 – Dec 2025 | 0.097 mg/l 2 Dec 2025 |
| Conductivity at 25 C 0077 | River water | 22 | Jan 2024 – Dec 2025 | 451 µS/cm 2 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Jan 2024 – Dec 2025 | 160 mg/l 2 Dec 2025 |
| Ammonia un-ionised as N 0119 | River water | 22 | Jan 2024 – Dec 2025 | below 0.00038 mg/l 2 Dec 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 22 | Jan 2024 – Dec 2025 | 8.2 mg/l 2 Dec 2025 |
| Chloride 0172 | River water | 22 | Jan 2024 – Dec 2025 | 18 mg/l 2 Dec 2025 |
| Flow Type 2896 | River water | 15 | Jul 2024 – Dec 2025 | High Flow 2 Dec 2025 |
| Nitrite as N 0118 | River water | 22 | Jan 2024 – Dec 2025 | 0.01 mg/l 2 Dec 2025 |
| Nitrogen, Total as N 9686 | River water | 22 | Jan 2024 – Dec 2025 | 5.9 mg/l 2 Dec 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Jan 2024 – Dec 2025 | 4.5 mg/l 2 Dec 2025 |
| No flow /No sample 7668 | River water | 1 | Jul 2025 – Jul 2025 | No flow/discharge at sampling point 23 Jul 2025 |
| Phosphorus, Total as P 0348 | River water | 22 | Jan 2024 – Dec 2025 | 0.17 mg/l 2 Dec 2025 |
| Silica, reactive as SiO2 0182 | River water | 22 | Jan 2024 – Dec 2025 | 8 mg/l 2 Dec 2025 |
| Solids, Suspended at 105 C 0135 | River water | 1 | Dec 2025 – Dec 2025 | 47 mg/l 2 Dec 2025 |
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.