Chignall Brook Roxwell Road One Bridge
EA name: CHIGNALL BK. ROXWELL RD. ONE BRIDGE (also listed as “CHIGNALL BK. ROXWELL RD. ONE BRIDGE CHELMSFORD”)
Environment Agency sampling point AN-CHIGN070 · 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
- 7 Sep 2026, 13:5824 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 25 since 13 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 568690, 207500As published, to the nearest 10 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- One Bridge BrookPlaced by position alone, on a line whose map name differs from its own, 1 m from the line.
- Next gauge downstream
- Beach's Mill On the River Can · 0.6 km along the river
- Why it was sampled
- Monitoring (national agency policy) (19 samples)
Environmental monitoring statutory (EU directives) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
79.9%
Sampled 7 Sep 2026, 24 days ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:58 | 79.9 | 79.9% |
| 4 Aug 2026, 12:06 | 90.7 | 90.7% |
| 20 Jul 2026, 12:53 | 92.7 | 92.7% |
| 12 Jun 2026, 13:43 | 89.3 | 89.3% |
| 6 May 2026, 11:51 | 93.1 | 93.1% |
| 14 Apr 2026, 12:52 | 93.2 | 93.2% |
| 6 Mar 2025, 10:35 | 98.1 | 98.1% |
| 5 Feb 2025, 13:22 | 94.5 | 94.5% |
| 22 Jan 2025, 10:08 | 95.6 | 95.6% |
| 9 Dec 2024, 13:05 | 91.2 | 91.2% |
| 21 Nov 2024, 11:10 | 92 | 92% |
| 18 Oct 2024, 13:37 | 89.5 | 89.5% |
| 16 Sep 2024, 12:33 | 124.2 | 124.2% |
| 29 Aug 2024, 12:02 | 96.1 | 96.1% |
| 18 Jul 2024, 05:59 | 91.3 | 91.3% |
| 25 Jun 2024, 10:19 | 89.9 | 89.9% |
| 31 May 2024, 11:03 | 94.8 | 94.8% |
| 14 May 2024, 13:32 | 85.1 | 85.1% |
| 18 Apr 2024, 11:32 | 95.8 | 95.8% |
| 20 Feb 2024, 12:52 | 95.8 | 95.8% |
| 19 Jan 2024, 12:05 | 94.1 | 94.1% |
| 8 Dec 2023, 15:30 | 92.9 | 92.9% |
| 24 Nov 2023, 15:05 | 87.7 | 87.7% |
| 23 Oct 2023, 12:26 | 88.7 | 88.7% |
| 13 Oct 2023, 11:17 | 82.4 | 82.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.7 mg/l
Sampled 7 Sep 2026, 24 days ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:58 | 7.7 | 7.7 mg/l |
| 4 Aug 2026, 12:06 | 8.48 | 8.48 mg/l |
| 20 Jul 2026, 12:53 | 9.49 | 9.49 mg/l |
| 12 Jun 2026, 13:43 | 8.9 | 8.9 mg/l |
| 6 May 2026, 11:51 | 10.2 | 10.2 mg/l |
| 14 Apr 2026, 12:52 | 10.4 | 10.4 mg/l |
| 6 Mar 2025, 10:35 | 12.2 | 12.2 mg/l |
| 5 Feb 2025, 13:22 | 11.6 | 11.6 mg/l |
| 22 Jan 2025, 10:08 | 11.8 | 11.8 mg/l |
| 9 Dec 2024, 13:05 | 10.8 | 10.8 mg/l |
| 21 Nov 2024, 11:10 | 11.6 | 11.6 mg/l |
| 18 Oct 2024, 13:37 | 9.6 | 9.6 mg/l |
| 16 Sep 2024, 12:33 | 12.8 | 12.8 mg/l |
| 29 Aug 2024, 12:02 | 9.58 | 9.58 mg/l |
| 18 Jul 2024, 05:59 | 9.53 | 9.53 mg/l |
| 25 Jun 2024, 10:19 | 9.1 | 9.1 mg/l |
| 31 May 2024, 11:03 | 10.2 | 10.2 mg/l |
| 14 May 2024, 13:32 | 8.69 | 8.69 mg/l |
| 18 Apr 2024, 11:32 | 11 | 11 mg/l |
| 20 Feb 2024, 12:52 | 11.1 | 11.1 mg/l |
| 19 Jan 2024, 12:05 | 12.5 | 12.5 mg/l |
| 8 Dec 2023, 15:30 | 11.1 | 11.1 mg/l |
| 24 Nov 2023, 15:05 | 10.2 | 10.2 mg/l |
| 23 Oct 2023, 12:26 | 9.74 | 9.74 mg/l |
| 13 Oct 2023, 11:17 | 8.09 | 8.09 mg/l |
Water temperature
code 0076 · °C
17 °C
Sampled 7 Sep 2026, 24 days ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:58 | 17 | 17 °C |
| 4 Aug 2026, 12:06 | 18.5 | 18.5 °C |
| 20 Jul 2026, 12:53 | 14.2 | 14.2 °C |
| 12 Jun 2026, 13:43 | 15.4 | 15.4 °C |
| 6 May 2026, 11:51 | 11.2 | 11.2 °C |
| 14 Apr 2026, 12:52 | 10.3 | 10.3 °C |
| 6 Mar 2025, 10:35 | 6 | 6 °C |
| 5 Feb 2025, 13:22 | 6.6 | 6.6 °C |
| 22 Jan 2025, 10:08 | 6.2 | 6.2 °C |
| 9 Dec 2024, 13:05 | 8 | 8 °C |
| 21 Nov 2024, 11:10 | 5.3 | 5.3 °C |
| 18 Oct 2024, 13:37 | 12.1 | 12.1 °C |
| 16 Sep 2024, 12:33 | 14 | 14 °C |
| 29 Aug 2024, 12:02 | 15.4 | 15.4 °C |
| 18 Jul 2024, 05:59 | 13.3 | 13.3 °C |
| 25 Jun 2024, 10:19 | 14.7 | 14.7 °C |
| 31 May 2024, 11:03 | 11.8 | 11.8 °C |
| 14 May 2024, 13:32 | 14.3 | 14.3 °C |
| 18 Apr 2024, 11:32 | 9.2 | 9.2 °C |
| 20 Feb 2024, 12:52 | 8.8 | 8.8 °C |
| 19 Jan 2024, 12:05 | 3.4 | 3.4 °C |
| 8 Dec 2023, 15:30 | 7.6 | 7.6 °C |
| 24 Nov 2023, 15:05 | 8.7 | 8.7 °C |
| 23 Oct 2023, 12:26 | 11.1 | 11.1 °C |
| 13 Oct 2023, 11:17 | 16.1 | 16.1 °C |
pH
code 0061
7.88
Sampled 7 Sep 2026, 24 days ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:58 | 7.88 | 7.88 |
| 4 Aug 2026, 12:06 | 8.03 | 8.03 |
| 20 Jul 2026, 12:53 | 8.33 | 8.33 |
| 12 Jun 2026, 13:43 | 8.11 | 8.11 |
| 6 May 2026, 11:51 | 8.18 | 8.18 |
| 14 Apr 2026, 12:52 | 7.94 | 7.94 |
| 6 Mar 2025, 10:35 | 8.01 | 8.01 |
| 5 Feb 2025, 13:22 | 8.13 | 8.13 |
| 22 Jan 2025, 10:08 | 8.08 | 8.08 |
| 9 Dec 2024, 13:05 | 7.93 | 7.93 |
| 21 Nov 2024, 11:10 | 7.96 | 7.96 |
| 18 Oct 2024, 13:37 | 7.99 | 7.99 |
| 16 Sep 2024, 12:33 | 8.02 | 8.02 |
| 29 Aug 2024, 12:02 | 8.03 | 8.03 |
| 18 Jul 2024, 05:59 | 8.02 | 8.02 |
| 25 Jun 2024, 10:19 | 8.03 | 8.03 |
| 31 May 2024, 11:03 | 8.15 | 8.15 |
| 14 May 2024, 13:32 | 7.76 | 7.76 |
| 18 Apr 2024, 11:32 | 8.03 | 8.03 |
| 20 Feb 2024, 12:52 | 8.08 | 8.08 |
| 19 Jan 2024, 12:05 | 8.28 | 8.28 |
| 8 Dec 2023, 15:30 | 8.01 | 8.01 |
| 24 Nov 2023, 15:05 | 7.94 | 7.94 |
| 23 Oct 2023, 12:26 | 7.91 | 7.91 |
| 13 Oct 2023, 11:17 | 7.76 | 7.76 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.28 mg/l
Sampled 7 Sep 2026, 24 days ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:58 | 0.28 | 0.28 mg/l |
| 4 Aug 2026, 12:06 | 0.036 | 0.036 mg/l |
| 20 Jul 2026, 12:53 | 0.15 | 0.15 mg/l |
| 12 Jun 2026, 13:43 | 0.047 | 0.047 mg/l |
| 6 May 2026, 11:51 | 0.17 | 0.17 mg/l |
| 14 Apr 2026, 12:52 | 0.072 | 0.072 mg/l |
| 6 Mar 2025, 10:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Feb 2025, 13:22 | 0.031 | 0.031 mg/l |
| 22 Jan 2025, 10:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2024, 13:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Nov 2024, 11:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Oct 2024, 13:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Sep 2024, 12:33 | 0.088 | 0.088 mg/l |
| 29 Aug 2024, 12:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jul 2024, 05:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Jun 2024, 10:19 | 0.032 | 0.032 mg/l |
| 31 May 2024, 11:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2024, 13:32 | 0.058 | 0.058 mg/l |
| 18 Apr 2024, 11:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Feb 2024, 12:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jan 2024, 12:05 | 0.062 | 0.062 mg/l |
| 8 Dec 2023, 15:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Nov 2023, 15:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Oct 2023, 12:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Oct 2023, 11:17 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
13.5 mg/l
Sampled 7 Sep 2026, 24 days ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:58 | 13.5 | 13.5 mg/l |
| 4 Aug 2026, 12:06 | 11 | 11 mg/l |
| 20 Jul 2026, 12:53 | 13 | 13 mg/l |
| 12 Jun 2026, 13:43 | 13 | 13 mg/l |
| 6 May 2026, 11:51 | 13 | 13 mg/l |
| 14 Apr 2026, 12:52 | 11.9 | 11.9 mg/l |
| 6 Mar 2025, 10:35 | 15 | 15 mg/l |
| 5 Feb 2025, 13:22 | 15 | 15 mg/l |
| 22 Jan 2025, 10:08 | 14 | 14 mg/l |
| 9 Dec 2024, 13:05 | 20 | 20 mg/l |
| 21 Nov 2024, 11:10 | 13 | 13 mg/l |
| 18 Oct 2024, 13:37 | 12 | 12 mg/l |
| 16 Sep 2024, 12:33 | 14.9 | 14.9 mg/l |
| 29 Aug 2024, 12:02 | 13 | 13 mg/l |
| 18 Jul 2024, 05:59 | 13 | 13 mg/l |
| 25 Jun 2024, 10:19 | 14 | 14 mg/l |
| 31 May 2024, 11:03 | 13 | 13 mg/l |
| 14 May 2024, 13:32 | 5.15 | 5.15 mg/l |
| 18 Apr 2024, 11:32 | 12 | 12 mg/l |
| 20 Feb 2024, 12:52 | 14 | 14 mg/l |
| 19 Jan 2024, 12:05 | 15 | 15 mg/l |
| 8 Dec 2023, 15:30 | 22 | 22 mg/l |
| 24 Nov 2023, 15:05 | 16 | 16 mg/l |
| 23 Oct 2023, 12:26 | 12 | 12 mg/l |
| 13 Oct 2023, 11:17 | 5.68 | 5.68 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.27 mg/l
Sampled 7 Sep 2026, 24 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:58 | 0.27 | 0.27 mg/l |
| 20 Jul 2026, 12:53 | 0.14 | 0.14 mg/l |
| 12 Jun 2026, 13:43 | 0.14 | 0.14 mg/l |
| 6 May 2026, 11:51 | 0.17 | 0.17 mg/l |
| 14 Apr 2026, 12:52 | 0.11 | 0.11 mg/l |
| 6 Mar 2025, 10:35 | 0.036 | 0.036 mg/l |
| 5 Feb 2025, 13:22 | 0.055 | 0.055 mg/l |
| 22 Jan 2025, 10:08 | 0.083 | 0.083 mg/l |
| 9 Dec 2024, 13:05 | 0.06 | 0.06 mg/l |
| 21 Nov 2024, 11:10 | 0.091 | 0.091 mg/l |
| 18 Oct 2024, 13:37 | 0.1 | 0.1 mg/l |
| 16 Sep 2024, 12:33 | 0.12 | 0.12 mg/l |
| 29 Aug 2024, 12:02 | 0.11 | 0.11 mg/l |
| 18 Jul 2024, 05:59 | 0.085 | 0.085 mg/l |
| 25 Jun 2024, 10:19 | 0.11 | 0.11 mg/l |
| 31 May 2024, 11:03 | 0.1 | 0.1 mg/l |
| 14 May 2024, 13:32 | 0.11 | 0.11 mg/l |
| 18 Apr 2024, 11:32 | 0.071 | 0.071 mg/l |
| 20 Feb 2024, 12:52 | 0.053 | 0.053 mg/l |
| 19 Jan 2024, 12:05 | 0.065 | 0.065 mg/l |
| 8 Dec 2023, 15:30 | 0.07 | 0.07 mg/l |
| 24 Nov 2023, 15:05 | 0.066 | 0.066 mg/l |
| 23 Oct 2023, 12:26 | 0.1 | 0.1 mg/l |
| 13 Oct 2023, 11:17 | 0.14 | 0.14 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
854 µS/cm
Sampled 7 Sep 2026, 24 days ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:58 | 854 | 854 µS/cm |
| 4 Aug 2026, 12:06 | 770 | 770 µS/cm |
| 20 Jul 2026, 12:53 | 841 | 841 µS/cm |
| 12 Jun 2026, 13:43 | 836 | 836 µS/cm |
| 6 May 2026, 11:51 | 858 | 858 µS/cm |
| 14 Apr 2026, 12:52 | 858 | 858 µS/cm |
| 6 Mar 2025, 10:35 | 876 | 876 µS/cm |
| 5 Feb 2025, 13:22 | 839 | 839 µS/cm |
| 22 Jan 2025, 10:08 | 880 | 880 µS/cm |
| 9 Dec 2024, 13:05 | 833 | 833 µS/cm |
| 21 Nov 2024, 11:10 | 849 | 849 µS/cm |
| 18 Oct 2024, 13:37 | 828 | 828 µS/cm |
| 16 Sep 2024, 12:33 | 838 | 838 µS/cm |
| 29 Aug 2024, 12:02 | 978 | 978 µS/cm |
| 18 Jul 2024, 05:59 | 835 | 835 µS/cm |
| 25 Jun 2024, 10:19 | 842 | 842 µS/cm |
| 31 May 2024, 11:03 | 857 | 857 µS/cm |
| 14 May 2024, 13:32 | 528 | 528 µS/cm |
| 18 Apr 2024, 11:32 | 832 | 832 µS/cm |
| 20 Feb 2024, 12:52 | 803 | 803 µS/cm |
| 19 Jan 2024, 12:05 | 893 | 893 µS/cm |
| 8 Dec 2023, 15:30 | 839 | 839 µS/cm |
| 24 Nov 2023, 15:05 | 878 | 878 µS/cm |
| 23 Oct 2023, 12:26 | 876 | 876 µS/cm |
| 13 Oct 2023, 11:17 | 568 | 568 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 | 25 | Oct 2023 – Sep 2026 | 79.9% 7 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 25 | Oct 2023 – Sep 2026 | 7.7 mg/l 7 Sep 2026 |
| Temperature of Water 0076 | River water | 25 | Oct 2023 – Sep 2026 | 17 °C 7 Sep 2026 |
| pH 0061 | River water | 25 | Oct 2023 – Sep 2026 | 7.88 7 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 25 | Oct 2023 – Sep 2026 | 0.28 mg/l 7 Sep 2026 |
| Nitrate as N 0117 | River water | 25 | Oct 2023 – Sep 2026 | 13.5 mg/l 7 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Oct 2023 – Sep 2026 | 0.27 mg/l 7 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 25 | Oct 2023 – Sep 2026 | 854 µS/cm 7 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 25 | Oct 2023 – Sep 2026 | 250 mg/l 7 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 25 | Oct 2023 – Sep 2026 | 0.0065 mg/l 7 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 14 | Feb 2024 – Mar 2025 | 1.7 mg/l 6 Mar 2025 |
| Nitrite as N 0118 | River water | 25 | Oct 2023 – Sep 2026 | 0.55 mg/l 7 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 25 | Oct 2023 – Sep 2026 | 14 mg/l 7 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.