Stort at Cannons Mill
EA name: STORT AT CANNONS MILL
Environment Agency sampling point TH-PLER0145 · 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
- 11 Aug 2026, 14:3551 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 35 since 2 Oct 2023 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 549324, 222342As published, to the nearest 1 m. Open in a map
- River, by its own name
- Stort
- River, by the map
- River StortPlaced on the river its name gives, 12 m from the line.
- Next gauge downstream
- Bishops Stortford, Grange Paddocks On the River Stort · 0.6 km along the river
- Nearest gauge upstream
- Stansted Mountfitchet, Gypsy Lane On the Stansted Brook · 2.4 km along the riverClavering On the River Stort · 13 km along the river
- Why it was sampled
- Monitoring (national agency policy) (30 samples)
Planned investigation (local monitoring) (5 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
76.2%
Sampled 11 Aug 2026, 51 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 14:35 | 76.2 | 76.2% |
| 23 Jul 2026, 15:01 | 100.6 | 100.6% |
| 8 Jun 2026, 11:05 | 65.7 | 65.7% |
| 19 May 2026, 13:00 | 83.2 | 83.2% |
| 14 Apr 2026, 10:49 | 87.2 | 87.2% |
| 2 Mar 2026, 11:16 | 85.2 | 85.2% |
| 2 Feb 2026, 09:02 | 84.1 | 84.1% |
| 15 Jan 2026, 12:24 | 87.2 | 87.2% |
| 3 Dec 2025, 11:45 | 63.7 | 63.7% |
| 6 Nov 2025, 11:12 | 60.3 | 60.3% |
| 20 Oct 2025, 11:50 | 62 | 62% |
| 1 Sep 2025, 12:50 | 77.5 | 77.5% |
| 18 Aug 2025, 13:28 | 78.8 | 78.8% |
| 4 Apr 2025, 09:04 | 81.5 | 81.5% |
| 7 Mar 2025, 10:28 | 88.6 | 88.6% |
| 6 Feb 2025, 11:32 | 85.9 | 85.9% |
| 21 Jan 2025, 10:52 | 76.8 | 76.8% |
| 10 Dec 2024, 09:34 | 84.4 | 84.4% |
| 8 Nov 2024, 10:01 | 77.4 | 77.4% |
| 2 Oct 2024, 09:39 | 73.3 | 73.3% |
| 9 Sep 2024, 13:01 | 78.1 | 78.1% |
| 2 Aug 2024, 11:15 | 80.1 | 80.1% |
| 9 Jul 2024, 12:47 | 76.7 | 76.7% |
| 5 Jun 2024, 09:04 | 79.4 | 79.4% |
| 5 Mar 2024, 12:52 | 86.3 | 86.3% |
| 5 Feb 2024, 14:06 | 82.5 | 82.5% |
| 4 Jan 2024, 13:24 | 84 | 84% |
| 12 Dec 2023, 10:24 | 81.9 | 81.9% |
| 3 Nov 2023, 09:20 | 73.6 | 73.6% |
| 2 Oct 2023, 10:04 | 65.8 | 65.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.49 mg/l
Sampled 11 Aug 2026, 51 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 14:35 | 7.49 | 7.49 mg/l |
| 23 Jul 2026, 15:01 | 9.07 | 9.07 mg/l |
| 8 Jun 2026, 11:05 | 6.89 | 6.89 mg/l |
| 19 May 2026, 13:00 | 8.97 | 8.97 mg/l |
| 14 Apr 2026, 10:49 | 9.97 | 9.97 mg/l |
| 2 Mar 2026, 11:16 | 9.76 | 9.76 mg/l |
| 2 Feb 2026, 09:02 | 10.1 | 10.1 mg/l |
| 15 Jan 2026, 12:24 | 10.7 | 10.7 mg/l |
| 3 Dec 2025, 11:45 | 7.55 | 7.55 mg/l |
| 6 Nov 2025, 11:12 | 6.45 | 6.45 mg/l |
| 20 Oct 2025, 11:50 | 6.59 | 6.59 mg/l |
| 1 Sep 2025, 12:50 | 7.86 | 7.86 mg/l |
| 18 Aug 2025, 13:28 | 7.87 | 7.87 mg/l |
| 4 Apr 2025, 09:04 | 9.2 | 9.2 mg/l |
| 7 Mar 2025, 10:28 | 10.4 | 10.4 mg/l |
| 6 Feb 2025, 11:32 | 10.8 | 10.8 mg/l |
| 21 Jan 2025, 10:52 | 9.45 | 9.45 mg/l |
| 10 Dec 2024, 09:34 | 10.2 | 10.2 mg/l |
| 8 Nov 2024, 10:01 | 8.6 | 8.6 mg/l |
| 2 Oct 2024, 09:39 | 7.7 | 7.7 mg/l |
| 9 Sep 2024, 13:01 | 8.15 | 8.15 mg/l |
| 2 Aug 2024, 11:15 | 8.06 | 8.06 mg/l |
| 9 Jul 2024, 12:47 | 7.8 | 7.8 mg/l |
| 5 Jun 2024, 09:04 | 8.6 | 8.6 mg/l |
| 5 Mar 2024, 12:52 | 10.2 | 10.2 mg/l |
| 5 Feb 2024, 14:06 | 9.5 | 9.5 mg/l |
| 4 Jan 2024, 13:24 | 9.91 | 9.91 mg/l |
| 12 Dec 2023, 10:24 | 9.68 | 9.68 mg/l |
| 3 Nov 2023, 09:20 | 8.35 | 8.35 mg/l |
| 2 Oct 2023, 10:04 | 6.76 | 6.76 mg/l |
Water temperature
code 0076 · °C
16.1 °C
Sampled 11 Aug 2026, 51 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 14:35 | 16.1 | 16.1 °C |
| 23 Jul 2026, 15:01 | 20.3 | 20.3 °C |
| 8 Jun 2026, 11:05 | 13.1 | 13.1 °C |
| 19 May 2026, 13:00 | 11.9 | 11.9 °C |
| 14 Apr 2026, 10:49 | 9.4 | 9.4 °C |
| 2 Mar 2026, 11:16 | 9.3 | 9.3 °C |
| 2 Feb 2026, 09:02 | 7.5 | 7.5 °C |
| 15 Jan 2026, 12:24 | 6.7 | 6.7 °C |
| 3 Dec 2025, 11:45 | 7.9 | 7.9 °C |
| 6 Nov 2025, 11:12 | 12.2 | 12.2 °C |
| 20 Oct 2025, 11:50 | 12.5 | 12.5 °C |
| 1 Sep 2025, 12:50 | 14.6 | 14.6 °C |
| 18 Aug 2025, 13:28 | 15.3 | 15.3 °C |
| 4 Apr 2025, 09:04 | 9.9 | 9.9 °C |
| 7 Mar 2025, 10:28 | 8.3 | 8.3 °C |
| 6 Feb 2025, 11:32 | 5.7 | 5.7 °C |
| 21 Jan 2025, 10:52 | 6.4 | 6.4 °C |
| 10 Dec 2024, 09:34 | 7.2 | 7.2 °C |
| 8 Nov 2024, 10:01 | 10.6 | 10.6 °C |
| 2 Oct 2024, 09:39 | 13 | 13 °C |
| 9 Sep 2024, 13:01 | 13.3 | 13.3 °C |
| 2 Aug 2024, 11:15 | 15 | 15 °C |
| 9 Jul 2024, 12:47 | 14.5 | 14.5 °C |
| 5 Jun 2024, 09:04 | 11.7 | 11.7 °C |
| 5 Mar 2024, 12:52 | 8.2 | 8.2 °C |
| 5 Feb 2024, 14:06 | 9.1 | 9.1 °C |
| 4 Jan 2024, 13:24 | 8.1 | 8.1 °C |
| 12 Dec 2023, 10:24 | 8 | 8 °C |
| 3 Nov 2023, 09:20 | 9.7 | 9.7 °C |
| 2 Oct 2023, 10:04 | 14 | 14 °C |
pH
code 0061
7.75
Sampled 11 Aug 2026, 51 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 14:35 | 7.75 | 7.75 |
| 23 Jul 2026, 15:01 | 8.11 | 8.11 |
| 8 Jun 2026, 11:05 | 7.56 | 7.56 |
| 19 May 2026, 13:00 | 7.46 | 7.46 |
| 14 Apr 2026, 10:49 | 8.07 | 8.07 |
| 2 Mar 2026, 11:16 | 7.62 | 7.62 |
| 2 Feb 2026, 09:02 | 7.82 | 7.82 |
| 15 Jan 2026, 12:24 | 7.84 | 7.84 |
| 3 Dec 2025, 11:45 | 7.39 | 7.39 |
| 6 Nov 2025, 11:12 | 7.43 | 7.43 |
| 20 Oct 2025, 11:50 | 7.52 | 7.52 |
| 1 Sep 2025, 12:50 | 8.22 | 8.22 |
| 18 Aug 2025, 13:28 | 7.57 | 7.57 |
| 4 Apr 2025, 09:04 | 7.6 | 7.6 |
| 7 Mar 2025, 10:28 | 7.66 | 7.66 |
| 6 Feb 2025, 11:32 | 7.72 | 7.72 |
| 21 Jan 2025, 10:52 | 7.59 | 7.59 |
| 10 Dec 2024, 09:34 | 7.88 | 7.88 |
| 8 Nov 2024, 10:01 | 7.53 | 7.53 |
| 2 Oct 2024, 09:39 | 7.65 | 7.65 |
| 9 Sep 2024, 13:01 | 7.45 | 7.45 |
| 2 Aug 2024, 11:15 | 7.58 | 7.58 |
| 9 Jul 2024, 12:47 | 7.59 | 7.59 |
| 5 Jun 2024, 09:04 | 7.57 | 7.57 |
| 5 Mar 2024, 12:52 | 7.59 | 7.59 |
| 5 Feb 2024, 14:06 | 7.64 | 7.64 |
| 4 Jan 2024, 13:24 | 7.92 | 7.92 |
| 12 Dec 2023, 10:24 | 7.71 | 7.71 |
| 3 Nov 2023, 09:20 | 7.79 | 7.79 |
| 2 Oct 2023, 10:04 | 7.49 | 7.49 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 11 Aug 2026, 51 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 14:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Jul 2026, 15:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jun 2026, 11:05 | 0.11 | 0.11 mg/l |
| 19 May 2026, 13:00 | 0.039 | 0.039 mg/l |
| 14 Apr 2026, 10:49 | 0.36 | 0.36 mg/l |
| 2 Mar 2026, 11:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2026, 09:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jan 2026, 12:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Dec 2025, 11:45 | 0.13 | 0.13 mg/l |
| 6 Nov 2025, 11:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Oct 2025, 11:50 | 0.15 | 0.15 mg/l |
| 1 Sep 2025, 12:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Aug 2025, 13:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Apr 2025, 09:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Mar 2025, 10:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Feb 2025, 11:32 | 0.042 | 0.042 mg/l |
| 21 Jan 2025, 10:52 | 0.092 | 0.092 mg/l |
| 10 Dec 2024, 09:34 | 0.033 | 0.033 mg/l |
| 8 Nov 2024, 10:01 | 0.12 | 0.12 mg/l |
| 2 Oct 2024, 09:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Sep 2024, 13:01 | 0.042 | 0.042 mg/l |
| 2 Aug 2024, 11:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jul 2024, 12:47 | 0.057 | 0.057 mg/l |
| 5 Jun 2024, 09:04 | 0.04 | 0.04 mg/l |
| 5 Mar 2024, 12:52 | 0.036 | 0.036 mg/l |
| 5 Feb 2024, 14:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Jan 2024, 13:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Dec 2023, 10:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Nov 2023, 09:20 | 0.036 | 0.036 mg/l |
| 2 Oct 2023, 10:04 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
14 mg/l
Sampled 11 Aug 2026, 51 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 14:35 | 14 | 14 mg/l |
| 23 Jul 2026, 15:01 | 18.9 | 18.9 mg/l |
| 8 Jun 2026, 11:05 | 12.9 | 12.9 mg/l |
| 19 May 2026, 13:00 | 10.9 | 10.9 mg/l |
| 14 Apr 2026, 10:49 | 10.9 | 10.9 mg/l |
| 2 Mar 2026, 11:16 | 9.57 | 9.57 mg/l |
| 2 Feb 2026, 09:02 | 13 | 13 mg/l |
| 15 Jan 2026, 12:24 | 15 | 15 mg/l |
| 3 Dec 2025, 11:45 | 13.8 | 13.8 mg/l |
| 6 Nov 2025, 11:12 | 13.9 | 13.9 mg/l |
| 20 Oct 2025, 11:50 | 14.9 | 14.9 mg/l |
| 1 Sep 2025, 12:50 | 14 | 14 mg/l |
| 18 Aug 2025, 13:28 | 14 | 14 mg/l |
| 4 Apr 2025, 09:04 | 12 | 12 mg/l |
| 7 Mar 2025, 10:28 | 9.68 | 9.68 mg/l |
| 6 Feb 2025, 11:32 | 9.76 | 9.76 mg/l |
| 21 Jan 2025, 10:52 | 9.73 | 9.73 mg/l |
| 10 Dec 2024, 09:34 | 11 | 11 mg/l |
| 8 Nov 2024, 10:01 | 11.9 | 11.9 mg/l |
| 2 Oct 2024, 09:39 | 16 | 16 mg/l |
| 9 Sep 2024, 13:01 | 11 | 11 mg/l |
| 2 Aug 2024, 11:15 | 12 | 12 mg/l |
| 9 Jul 2024, 12:47 | 9.06 | 9.06 mg/l |
| 5 Jun 2024, 09:04 | 9.57 | 9.57 mg/l |
| 5 Mar 2024, 12:52 | 8.08 | 8.08 mg/l |
| 5 Feb 2024, 14:06 | 8.89 | 8.89 mg/l |
| 4 Jan 2024, 13:24 | 8.98 | 8.98 mg/l |
| 12 Dec 2023, 10:24 | 8.87 | 8.87 mg/l |
| 3 Nov 2023, 09:20 | 11 | 11 mg/l |
| 2 Oct 2023, 10:04 | 11 | 11 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.72 mg/l
Sampled 23 Jul 2026, 2 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 23 Jul 2026, 15:01 | 0.72 | 0.72 mg/l |
| 8 Jun 2026, 11:05 | 0.25 | 0.25 mg/l |
| 19 May 2026, 13:00 | 0.28 | 0.28 mg/l |
| 14 Apr 2026, 10:49 | 0.14 | 0.14 mg/l |
| 2 Mar 2026, 11:16 | 0.1 | 0.1 mg/l |
| 2 Feb 2026, 09:02 | 0.11 | 0.11 mg/l |
| 15 Jan 2026, 12:24 | 0.13 | 0.13 mg/l |
| 3 Dec 2025, 11:45 | 0.22 | 0.22 mg/l |
| 6 Nov 2025, 11:12 | 0.14 | 0.14 mg/l |
| 20 Oct 2025, 11:50 | 0.2 | 0.2 mg/l |
| 1 Sep 2025, 12:50 | 0.15 | 0.15 mg/l |
| 18 Aug 2025, 13:28 | 0.14 | 0.14 mg/l |
| 4 Apr 2025, 09:04 | 0.053 | 0.053 mg/l |
| 7 Mar 2025, 10:28 | 0.074 | 0.074 mg/l |
| 6 Feb 2025, 11:32 | 0.078 | 0.078 mg/l |
| 21 Jan 2025, 10:52 | 0.093 | 0.093 mg/l |
| 10 Dec 2024, 09:34 | 0.085 | 0.085 mg/l |
| 8 Nov 2024, 10:01 | 0.14 | 0.14 mg/l |
| 2 Oct 2024, 09:39 | 0.14 | 0.14 mg/l |
| 9 Sep 2024, 13:01 | 0.24 | 0.24 mg/l |
| 2 Aug 2024, 11:15 | 0.21 | 0.21 mg/l |
| 9 Jul 2024, 12:47 | 0.22 | 0.22 mg/l |
| 5 Jun 2024, 09:04 | 0.18 | 0.18 mg/l |
| 5 Mar 2024, 12:52 | 0.11 | 0.11 mg/l |
| 5 Feb 2024, 14:06 | 0.14 | 0.14 mg/l |
| 4 Jan 2024, 13:24 | 0.11 | 0.11 mg/l |
| 12 Dec 2023, 10:24 | 0.095 | 0.095 mg/l |
| 3 Nov 2023, 09:20 | 0.13 | 0.13 mg/l |
| 2 Oct 2023, 10:04 | 0.22 | 0.22 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
890 µS/cm
Sampled 11 Aug 2026, 51 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Aug 2026, 14:35 | 890 | 890 µS/cm |
| 23 Jul 2026, 15:01 | 1121 | 1121 µS/cm |
| 8 Jun 2026, 11:05 | 822 | 822 µS/cm |
| 19 May 2026, 13:00 | 809 | 809 µS/cm |
| 14 Apr 2026, 10:49 | 799 | 799 µS/cm |
| 2 Mar 2026, 11:16 | 735 | 735 µS/cm |
| 2 Feb 2026, 09:02 | 733 | 733 µS/cm |
| 15 Jan 2026, 12:24 | 775 | 775 µS/cm |
| 3 Dec 2025, 11:45 | 866 | 866 µS/cm |
| 6 Nov 2025, 11:12 | 863 | 863 µS/cm |
| 20 Oct 2025, 11:50 | 895 | 895 µS/cm |
| 1 Sep 2025, 12:50 | 829 | 829 µS/cm |
| 18 Aug 2025, 13:28 | 842 | 842 µS/cm |
| 4 Apr 2025, 09:04 | 791 | 791 µS/cm |
| 7 Mar 2025, 10:28 | 772 | 772 µS/cm |
| 6 Feb 2025, 11:32 | 768 | 768 µS/cm |
| 21 Jan 2025, 10:52 | 783 | 783 µS/cm |
| 10 Dec 2024, 09:34 | 659 | 659 µS/cm |
| 8 Nov 2024, 10:01 | 821 | 821 µS/cm |
| 2 Oct 2024, 09:39 | 600 | 600 µS/cm |
| 9 Sep 2024, 13:01 | 799 | 799 µS/cm |
| 2 Aug 2024, 11:15 | 793 | 793 µS/cm |
| 9 Jul 2024, 12:47 | 748 | 748 µS/cm |
| 5 Jun 2024, 09:04 | 793 | 793 µS/cm |
| 5 Mar 2024, 12:52 | 795 | 795 µS/cm |
| 5 Feb 2024, 14:06 | 773 | 773 µS/cm |
| 4 Jan 2024, 13:24 | 666 | 666 µS/cm |
| 12 Dec 2023, 10:24 | 648 | 648 µS/cm |
| 3 Nov 2023, 09:20 | 549 | 549 µS/cm |
| 2 Oct 2023, 10:04 | 812 | 812 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 30 | Oct 2023 – Aug 2026 | 76.2% 11 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 30 | Oct 2023 – Aug 2026 | 7.49 mg/l 11 Aug 2026 |
| Temperature of Water 0076 | River water | 30 | Oct 2023 – Aug 2026 | 16.1 °C 11 Aug 2026 |
| pH 0061 | River water | 30 | Oct 2023 – Aug 2026 | 7.75 11 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 30 | Oct 2023 – Aug 2026 | below 0.03 mg/l 11 Aug 2026 |
| Nitrate as N 0117 | River water | 30 | Oct 2023 – Aug 2026 | 14 mg/l 11 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 29 | Oct 2023 – Jul 2026 | 0.72 mg/l 23 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 30 | Oct 2023 – Aug 2026 | 890 µS/cm 11 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 30 | Oct 2023 – Aug 2026 | 260 mg/l 11 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 30 | Oct 2023 – Aug 2026 | below 0.00049 mg/l 11 Aug 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 30 | Oct 2023 – Aug 2026 | 2.2 µg/l 11 Aug 2026 |
| Nitrite as N 0118 | River water | 30 | Oct 2023 – Aug 2026 | 0.035 mg/l 11 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 30 | Oct 2023 – Aug 2026 | 14 mg/l 11 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 32 | Oct 2023 – Aug 2026 | 4 mg/l 11 Aug 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.