River Tone at Tone Bridge
EA name: RIVER TONE AT TONE BRIDGE (also listed as “TONE BRIDGE”)
Environment Agency sampling point SW-E1004400 · 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
- 14 Sep 2026, 11:0017 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 61 since 16 Apr 2025 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 312620, 121903As published, to the nearest 1 m. Open in a map
- River, by its own name
- Tone
- River, by the map
- River TonePlaced on the river its name gives, 0 m from the line.
- Next gauge downstream
- Bishops Hull On the River Tone · 12 km along the river
- Nearest gauge upstream
- Greenham On the River Tone · 10 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (43 samples)
Environmental monitoring statutory (EU directives) (18 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
92.7%
Sampled 2 Sep 2026, 29 days ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 10:02 | 92.7 | 92.7% |
| 4 Aug 2026, 10:59 | 97.4 | 97.4% |
| 30 Jul 2026, 11:01 | 96.8 | 96.8% |
| 3 Jun 2026, 13:28 | 97 | 97% |
| 8 May 2026, 12:42 | 101.1 | 101.1% |
| 14 Apr 2026, 14:54 | 105 | 105% |
| 19 Mar 2026, 10:37 | 103.2 | 103.2% |
| 23 Feb 2026, 11:42 | 99.9 | 99.9% |
| 30 Jan 2026, 13:10 | 100.1 | 100.1% |
| 1 Dec 2025, 09:27 | 98 | 98% |
| 5 Nov 2025, 09:04 | 93 | 93% |
| 2 Oct 2025, 11:28 | 96.2 | 96.2% |
| 12 Sep 2025, 12:40 | 96.7 | 96.7% |
| 15 Aug 2025, 10:38 | 98.5 | 98.5% |
| 29 Jul 2025, 10:09 | 94.9 | 94.9% |
| 24 Jun 2025, 11:09 | 98.6 | 98.6% |
| 6 May 2025, 10:04 | 98.6 | 98.6% |
| 16 Apr 2025, 14:26 | 103 | 103% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.3 mg/l
Sampled 2 Sep 2026, 29 days ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 10:02 | 9.3 | 9.3 mg/l |
| 4 Aug 2026, 10:59 | 9.29 | 9.29 mg/l |
| 30 Jul 2026, 11:01 | 9.14 | 9.14 mg/l |
| 3 Jun 2026, 13:28 | 9.61 | 9.61 mg/l |
| 8 May 2026, 12:42 | 10.7 | 10.7 mg/l |
| 14 Apr 2026, 14:54 | 11.7 | 11.7 mg/l |
| 19 Mar 2026, 10:37 | 11.9 | 11.9 mg/l |
| 23 Feb 2026, 11:42 | 11.5 | 11.5 mg/l |
| 30 Jan 2026, 13:10 | 11.8 | 11.8 mg/l |
| 1 Dec 2025, 09:27 | 11.2 | 11.2 mg/l |
| 5 Nov 2025, 09:04 | 9.78 | 9.78 mg/l |
| 2 Oct 2025, 11:28 | 10.3 | 10.3 mg/l |
| 12 Sep 2025, 12:40 | 10 | 10 mg/l |
| 15 Aug 2025, 10:38 | 9.68 | 9.68 mg/l |
| 29 Jul 2025, 10:09 | 9.48 | 9.48 mg/l |
| 24 Jun 2025, 11:09 | 9.73 | 9.73 mg/l |
| 6 May 2025, 10:04 | 11.2 | 11.2 mg/l |
| 16 Apr 2025, 14:26 | 11.4 | 11.4 mg/l |
Water temperature
code 0076 · °C
15.1 °C
Sampled 2 Sep 2026, 29 days ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 10:02 | 15.1 | 15.1 °C |
| 4 Aug 2026, 10:59 | 17.5 | 17.5 °C |
| 30 Jul 2026, 11:01 | 18 | 18 °C |
| 3 Jun 2026, 13:28 | 15.7 | 15.7 °C |
| 8 May 2026, 12:42 | 12.9 | 12.9 °C |
| 14 Apr 2026, 14:54 | 10.4 | 10.4 °C |
| 19 Mar 2026, 10:37 | 9.1 | 9.1 °C |
| 23 Feb 2026, 11:42 | 9.2 | 9.2 °C |
| 30 Jan 2026, 13:10 | 8 | 8 °C |
| 1 Dec 2025, 09:27 | 9.4 | 9.4 °C |
| 5 Nov 2025, 09:04 | 13 | 13 °C |
| 2 Oct 2025, 11:28 | 12 | 12 °C |
| 12 Sep 2025, 12:40 | 13.7 | 13.7 °C |
| 15 Aug 2025, 10:38 | 16.1 | 16.1 °C |
| 29 Jul 2025, 10:09 | 15.3 | 15.3 °C |
| 24 Jun 2025, 11:09 | 15.9 | 15.9 °C |
| 6 May 2025, 10:04 | 9.6 | 9.6 °C |
| 16 Apr 2025, 14:26 | 10.7 | 10.7 °C |
pH
code 0061
8.16
Sampled 2 Sep 2026, 29 days ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 10:02 | 8.16 | 8.16 |
| 4 Aug 2026, 10:59 | 8.18 | 8.18 |
| 30 Jul 2026, 11:01 | 7.96 | 7.96 |
| 3 Jun 2026, 13:28 | 8.06 | 8.06 |
| 8 May 2026, 12:42 | 8.16 | 8.16 |
| 14 Apr 2026, 14:54 | 8.26 | 8.26 |
| 19 Mar 2026, 10:37 | 7.97 | 7.97 |
| 23 Feb 2026, 11:42 | 7.98 | 7.98 |
| 30 Jan 2026, 13:10 | 7.75 | 7.75 |
| 1 Dec 2025, 09:27 | 7.84 | 7.84 |
| 5 Nov 2025, 09:04 | 7.83 | 7.83 |
| 2 Oct 2025, 11:28 | 8.13 | 8.13 |
| 12 Sep 2025, 12:40 | 8.11 | 8.11 |
| 15 Aug 2025, 10:38 | 8.24 | 8.24 |
| 29 Jul 2025, 10:09 | 8.04 | 8.04 |
| 24 Jun 2025, 11:09 | 8.17 | 8.17 |
| 6 May 2025, 10:04 | 8.12 | 8.12 |
| 16 Apr 2025, 14:26 | 8.13 | 8.13 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 2 Sep 2026, 29 days ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 10:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Aug 2026, 10:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jul 2026, 11:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jun 2026, 13:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 May 2026, 12:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Apr 2026, 14:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Mar 2026, 10:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Feb 2026, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jan 2026, 13:10 | 0.034 | 0.034 mg/l |
| 1 Dec 2025, 09:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Nov 2025, 09:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Oct 2025, 11:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Sep 2025, 12:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Aug 2025, 10:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Jul 2025, 10:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jun 2025, 11:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 May 2025, 10:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Apr 2025, 14:26 | 0.057 | 0.057 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
4.79 mg/l
Sampled 2 Sep 2026, 29 days ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 10:02 | 4.79 | 4.79 mg/l |
| 4 Aug 2026, 10:59 | 5.19 | 5.19 mg/l |
| 30 Jul 2026, 11:01 | 4.99 | 4.99 mg/l |
| 3 Jun 2026, 13:28 | 4.38 | 4.38 mg/l |
| 8 May 2026, 12:42 | 4.68 | 4.68 mg/l |
| 14 Apr 2026, 14:54 | 4.49 | 4.49 mg/l |
| 19 Mar 2026, 10:37 | 3.79 | 3.79 mg/l |
| 23 Feb 2026, 11:42 | 2.99 | 2.99 mg/l |
| 30 Jan 2026, 13:10 | 2.7 | 2.7 mg/l |
| 1 Dec 2025, 09:27 | 3.29 | 3.29 mg/l |
| 5 Nov 2025, 09:04 | 2.89 | 2.89 mg/l |
| 2 Oct 2025, 11:28 | 4.79 | 4.79 mg/l |
| 12 Sep 2025, 12:40 | 3.89 | 3.89 mg/l |
| 15 Aug 2025, 10:38 | 4.99 | 4.99 mg/l |
| 29 Jul 2025, 10:09 | 4.89 | 4.89 mg/l |
| 24 Jun 2025, 11:09 | 4.78 | 4.78 mg/l |
| 6 May 2025, 10:04 | 4.28 | 4.28 mg/l |
| 16 Apr 2025, 14:26 | 3.47 | 3.47 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.097 mg/l
Sampled 2 Sep 2026, 29 days ago · 17 results banked
Every result (17)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 10:02 | 0.097 | 0.097 mg/l |
| 30 Jul 2026, 11:01 | 0.089 | 0.089 mg/l |
| 3 Jun 2026, 13:28 | 0.099 | 0.099 mg/l |
| 8 May 2026, 12:42 | 0.064 | 0.064 mg/l |
| 14 Apr 2026, 14:54 | 0.043 | 0.043 mg/l |
| 19 Mar 2026, 10:37 | 0.039 | 0.039 mg/l |
| 23 Feb 2026, 11:42 | 0.047 | 0.047 mg/l |
| 30 Jan 2026, 13:10 | 0.059 | 0.059 mg/l |
| 1 Dec 2025, 09:27 | 0.1 | 0.1 mg/l |
| 5 Nov 2025, 09:04 | 0.066 | 0.066 mg/l |
| 2 Oct 2025, 11:28 | 0.045 | 0.045 mg/l |
| 12 Sep 2025, 12:40 | 0.083 | 0.083 mg/l |
| 15 Aug 2025, 10:38 | 0.034 | 0.034 mg/l |
| 29 Jul 2025, 10:09 | 0.081 | 0.081 mg/l |
| 24 Jun 2025, 11:09 | 0.082 | 0.082 mg/l |
| 6 May 2025, 10:04 | 0.05 | 0.05 mg/l |
| 16 Apr 2025, 14:26 | 0.071 | 0.071 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
506 µS/cm
Sampled 2 Sep 2026, 29 days ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 10:02 | 506 | 506 µS/cm |
| 4 Aug 2026, 10:59 | 480 | 480 µS/cm |
| 30 Jul 2026, 11:01 | 479 | 479 µS/cm |
| 3 Jun 2026, 13:28 | 446 | 446 µS/cm |
| 8 May 2026, 12:42 | 452 | 452 µS/cm |
| 14 Apr 2026, 14:54 | 425 | 425 µS/cm |
| 19 Mar 2026, 10:37 | 351 | 351 µS/cm |
| 23 Feb 2026, 11:42 | 257 | 257 µS/cm |
| 30 Jan 2026, 13:10 | 219 | 219 µS/cm |
| 1 Dec 2025, 09:27 | 339 | 339 µS/cm |
| 5 Nov 2025, 09:04 | 330 | 330 µS/cm |
| 2 Oct 2025, 11:28 | 454 | 454 µS/cm |
| 12 Sep 2025, 12:40 | 419 | 419 µS/cm |
| 15 Aug 2025, 10:38 | 468 | 468 µS/cm |
| 29 Jul 2025, 10:09 | 468 | 468 µS/cm |
| 24 Jun 2025, 11:09 | 452 | 452 µS/cm |
| 6 May 2025, 10:04 | 408 | 408 µS/cm |
| 16 Apr 2025, 14:26 | 381 | 381 µS/cm |
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
810 per 100 ml
Sampled 14 Sep 2026, 17 days ago · 46 results banked
Every result (46)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Sep 2026, 11:00 | 810 | 810 per 100 ml |
| 2 Sep 2026, 10:02 | 540 | 540 per 100 ml |
| 27 Aug 2026, 11:33 | 1500 | 1500 per 100 ml |
| 20 Aug 2026, 11:16 | 2200 | 2200 per 100 ml |
| 16 Aug 2026, 11:17 | 870 | 870 per 100 ml |
| 10 Aug 2026, 11:02 | 720 | 720 per 100 ml |
| 4 Aug 2026, 10:59 | 870 | 870 per 100 ml |
| 30 Jul 2026, 11:01 | 430 | 430 per 100 ml |
| 22 Jul 2026, 11:16 | 720 | 720 per 100 ml |
| 13 Jul 2026, 10:49 | 1700 | 1700 per 100 ml |
| 7 Jul 2026, 13:13 | 1100 | 1100 per 100 ml |
| 3 Jul 2026, 13:07 | 1500 | 1500 per 100 ml |
| 25 Jun 2026, 10:01 | 2100 | 2100 per 100 ml |
| 21 Jun 2026, 12:55 | 790 | 790 per 100 ml |
| 17 Jun 2026, 12:52 | 660 | 660 per 100 ml |
| 11 Jun 2026, 10:43 | 750 | 750 per 100 ml |
| 3 Jun 2026, 13:28 | 1800 | 1800 per 100 ml |
| 26 May 2026, 14:53 | 1300 | 1300 per 100 ml |
| 18 May 2026, 13:26 | 960 | 960 per 100 ml |
| 15 May 2026, 13:36 | 730 | 730 per 100 ml |
| 24 Sep 2025, 10:20 | 760 | 760 per 100 ml |
| 18 Sep 2025, 10:00 | 720 | 720 per 100 ml |
| 12 Sep 2025, 12:38 | 1100 | 1100 per 100 ml |
| 10 Sep 2025, 14:33 | 6300 | 6300 per 100 ml |
| 4 Sep 2025, 14:01 | 4500 | 4500 per 100 ml |
| 2 Sep 2025, 10:38 | 780 | 780 per 100 ml |
| 28 Aug 2025, 14:30 | 860 | 860 per 100 ml |
| 20 Aug 2025, 10:07 | 1000 | 1000 per 100 ml |
| 15 Aug 2025, 11:39 | 1100 | 1100 per 100 ml |
| 6 Aug 2025, 10:00 | 960 | 960 per 100 ml |
| 1 Aug 2025, 12:43 | 1200 | 1200 per 100 ml |
| 31 Jul 2025, 14:55 | 1200 | 1200 per 100 ml |
| 28 Jul 2025, 10:32 | 2300 | 2300 per 100 ml |
| 21 Jul 2025, 12:57 | 1500 | 1500 per 100 ml |
| 8 Jul 2025, 14:38 | 930 | 930 per 100 ml |
| 29 Jun 2025, 13:21 | 1900 | 1900 per 100 ml |
| 19 Jun 2025, 10:12 | 1500 | 1500 per 100 ml |
| 11 Jun 2025, 10:02 | 1300 | 1300 per 100 ml |
| 4 Jun 2025, 14:45 | 2600 | 2600 per 100 ml |
| 3 Jun 2025, 14:17 | 6600 | 6600 per 100 ml |
| 29 May 2025, 10:03 | 1000 | 1000 per 100 ml |
| 23 May 2025, 14:17 | 690 | 690 per 100 ml |
| 22 May 2025, 14:15 | 1500 | 1500 per 100 ml |
| 17 May 2025, 14:57 | 830 | 830 per 100 ml |
| 15 May 2025, 14:25 | 880 | 880 per 100 ml |
| 2 May 2025, 12:28 | 750 | 750 per 100 ml |
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 | 18 | Apr 2025 – Sep 2026 | 92.7% 2 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 18 | Apr 2025 – Sep 2026 | 9.3 mg/l 2 Sep 2026 |
| Temperature of Water 0076 | River water | 18 | Apr 2025 – Sep 2026 | 15.1 °C 2 Sep 2026 |
| pH 0061 | River water | 18 | Apr 2025 – Sep 2026 | 8.16 2 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 18 | Apr 2025 – Sep 2026 | below 0.03 mg/l 2 Sep 2026 |
| Nitrate as N 0117 | River water | 18 | Apr 2025 – Sep 2026 | 4.79 mg/l 2 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 17 | Apr 2025 – Sep 2026 | 0.097 mg/l 2 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 18 | Apr 2025 – Sep 2026 | 506 µS/cm 2 Sep 2026 |
| Escherichia coli : Confirmed : MF 2348 | River water | 46 | May 2025 – Sep 2026 | 810 per 100 ml 14 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 18 | Apr 2025 – Sep 2026 | 180 mg/l 2 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 18 | Apr 2025 – Sep 2026 | below 0.00079 mg/l 2 Sep 2026 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 44 | May 2025 – Sep 2026 | 770 colony forming units / 100ml 14 Sep 2026 |
| MST Filtration 4926 | River water | 47 | May 2025 – Sep 2026 | DNA Stored 14 Sep 2026 |
| Nitrite as N 0118 | River water | 18 | Apr 2025 – Sep 2026 | 0.013 mg/l 2 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 18 | Apr 2025 – Sep 2026 | 4.8 mg/l 2 Sep 2026 |
| Volume of Sample Filtered 4865 | River water | 47 | May 2025 – Sep 2026 | 930 millilitre 14 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.