Stort at Spellbrook Weir
EA name: STORT AT SPELLBROOK WEIR
Environment Agency sampling point TH-PLER0152 · 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
- 4 Sep 2026, 13:1327 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 28 since 12 Jun 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 549030, 217559As 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, 40 m from the line.
- Next gauge downstream
- Sawbridgeworth On the River Stort · 3.6 km along the river (the path rests on a repair to the map)
- Nearest gauge upstream
- Bishops Stortford, Grange Paddocks On the River Stort · 5.7 km along the river
- Why it was sampled
- Monitoring (national agency policy) (28 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
80.1%
Sampled 4 Sep 2026, 27 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:13 | 80.1 | 80.1% |
| 6 Aug 2026, 13:07 | 84.8 | 84.8% |
| 23 Jul 2026, 14:53 | 104 | 104% |
| 4 Jun 2026, 10:45 | 71.4 | 71.4% |
| 15 May 2026, 13:44 | 90.7 | 90.7% |
| 27 Apr 2026, 09:38 | 93 | 93% |
| 2 Mar 2026, 12:57 | 93.3 | 93.3% |
| 10 Feb 2026, 11:47 | 92.3 | 92.3% |
| 5 Jan 2026, 14:09 | 86.8 | 86.8% |
| 4 Dec 2025, 12:33 | 80.1 | 80.1% |
| 6 Nov 2025, 12:36 | 68.4 | 68.4% |
| 13 Oct 2025, 11:06 | 75.5 | 75.5% |
| 4 Sep 2025, 13:45 | 68.3 | 68.3% |
| 6 Aug 2025, 11:46 | 84.6 | 84.6% |
| 3 Jul 2025, 14:00 | 100.6 | 100.6% |
| 9 Jun 2025, 09:42 | 99.7 | 99.7% |
| 22 May 2025, 11:16 | 94 | 94% |
| 30 Apr 2025, 13:27 | 95.5 | 95.5% |
| 4 Mar 2025, 13:27 | 97.1 | 97.1% |
| 13 Feb 2025, 10:09 | 93.2 | 93.2% |
| 23 Jan 2025, 12:28 | 88.8 | 88.8% |
| 11 Dec 2024, 11:44 | 84.5 | 84.5% |
| 1 Nov 2024, 13:01 | 83.2 | 83.2% |
| 4 Oct 2024, 12:07 | 81.8 | 81.8% |
| 6 Sep 2024, 11:30 | 71.8 | 71.8% |
| 2 Aug 2024, 10:48 | 101.8 | 101.8% |
| 11 Jul 2024, 11:37 | 81.3 | 81.3% |
| 12 Jun 2024, 12:34 | 91.6 | 91.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.4 mg/l
Sampled 4 Sep 2026, 27 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:13 | 7.4 | 7.4 mg/l |
| 6 Aug 2026, 13:07 | 7.93 | 7.93 mg/l |
| 23 Jul 2026, 14:53 | 9.45 | 9.45 mg/l |
| 4 Jun 2026, 10:45 | 6.98 | 6.98 mg/l |
| 15 May 2026, 13:44 | 9.56 | 9.56 mg/l |
| 27 Apr 2026, 09:38 | 9.67 | 9.67 mg/l |
| 2 Mar 2026, 12:57 | 10.3 | 10.3 mg/l |
| 10 Feb 2026, 11:47 | 10.5 | 10.5 mg/l |
| 5 Jan 2026, 14:09 | 11.1 | 11.1 mg/l |
| 4 Dec 2025, 12:33 | 9.22 | 9.22 mg/l |
| 6 Nov 2025, 12:36 | 7.13 | 7.13 mg/l |
| 13 Oct 2025, 11:06 | 7.78 | 7.78 mg/l |
| 4 Sep 2025, 13:45 | 6.5 | 6.5 mg/l |
| 6 Aug 2025, 11:46 | 8.12 | 8.12 mg/l |
| 3 Jul 2025, 14:00 | 9.12 | 9.12 mg/l |
| 9 Jun 2025, 09:42 | 10 | 10 mg/l |
| 22 May 2025, 11:16 | 9.58 | 9.58 mg/l |
| 30 Apr 2025, 13:27 | 9.34 | 9.34 mg/l |
| 4 Mar 2025, 13:27 | 11.5 | 11.5 mg/l |
| 13 Feb 2025, 10:09 | 11.7 | 11.7 mg/l |
| 23 Jan 2025, 12:28 | 10.7 | 10.7 mg/l |
| 11 Dec 2024, 11:44 | 9.94 | 9.94 mg/l |
| 1 Nov 2024, 13:01 | 8.89 | 8.89 mg/l |
| 4 Oct 2024, 12:07 | 8.68 | 8.68 mg/l |
| 6 Sep 2024, 11:30 | 6.85 | 6.85 mg/l |
| 2 Aug 2024, 10:48 | 9.27 | 9.27 mg/l |
| 11 Jul 2024, 11:37 | 7.89 | 7.89 mg/l |
| 12 Jun 2024, 12:34 | 9.42 | 9.42 mg/l |
Water temperature
code 0076 · °C
19.1 °C
Sampled 4 Sep 2026, 27 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:13 | 19.1 | 19.1 °C |
| 6 Aug 2026, 13:07 | 18.5 | 18.5 °C |
| 23 Jul 2026, 14:53 | 19.9 | 19.9 °C |
| 4 Jun 2026, 10:45 | 16.3 | 16.3 °C |
| 15 May 2026, 13:44 | 12.9 | 12.9 °C |
| 27 Apr 2026, 09:38 | 13.5 | 13.5 °C |
| 2 Mar 2026, 12:57 | 11 | 11 °C |
| 10 Feb 2026, 11:47 | 9.5 | 9.5 °C |
| 5 Jan 2026, 14:09 | 4.9 | 4.9 °C |
| 4 Dec 2025, 12:33 | 9.1 | 9.1 °C |
| 6 Nov 2025, 12:36 | 13.4 | 13.4 °C |
| 13 Oct 2025, 11:06 | 13.9 | 13.9 °C |
| 4 Sep 2025, 13:45 | 17.6 | 17.6 °C |
| 6 Aug 2025, 11:46 | 17.2 | 17.2 °C |
| 3 Jul 2025, 14:00 | 20 | 20 °C |
| 9 Jun 2025, 09:42 | 14.9 | 14.9 °C |
| 22 May 2025, 11:16 | 14.4 | 14.4 °C |
| 30 Apr 2025, 13:27 | 16.3 | 16.3 °C |
| 4 Mar 2025, 13:27 | 7.8 | 7.8 °C |
| 13 Feb 2025, 10:09 | 5.7 | 5.7 °C |
| 23 Jan 2025, 12:28 | 7.2 | 7.2 °C |
| 11 Dec 2024, 11:44 | 8.2 | 8.2 °C |
| 1 Nov 2024, 13:01 | 12.3 | 12.3 °C |
| 4 Oct 2024, 12:07 | 12.6 | 12.6 °C |
| 6 Sep 2024, 11:30 | 17.5 | 17.5 °C |
| 2 Aug 2024, 10:48 | 19.8 | 19.8 °C |
| 11 Jul 2024, 11:37 | 16.7 | 16.7 °C |
| 12 Jun 2024, 12:34 | 14 | 14 °C |
pH
code 0061
7.78
Sampled 4 Sep 2026, 27 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:13 | 7.78 | 7.78 |
| 6 Aug 2026, 13:07 | 7.83 | 7.83 |
| 23 Jul 2026, 14:53 | 8.01 | 8.01 |
| 4 Jun 2026, 10:45 | 7.79 | 7.79 |
| 15 May 2026, 13:44 | 8.1 | 8.1 |
| 27 Apr 2026, 09:38 | 7.81 | 7.81 |
| 2 Mar 2026, 12:57 | 8.08 | 8.08 |
| 10 Feb 2026, 11:47 | 8.01 | 8.01 |
| 5 Jan 2026, 14:09 | 7.89 | 7.89 |
| 4 Dec 2025, 12:33 | 7.75 | 7.75 |
| 6 Nov 2025, 12:36 | 7.71 | 7.71 |
| 13 Oct 2025, 11:06 | 7.62 | 7.62 |
| 4 Sep 2025, 13:45 | 7.64 | 7.64 |
| 6 Aug 2025, 11:46 | 7.85 | 7.85 |
| 3 Jul 2025, 14:00 | 7.9 | 7.9 |
| 9 Jun 2025, 09:42 | 7.96 | 7.96 |
| 22 May 2025, 11:16 | 7.94 | 7.94 |
| 30 Apr 2025, 13:27 | 7.74 | 7.74 |
| 4 Mar 2025, 13:27 | 7.94 | 7.94 |
| 13 Feb 2025, 10:09 | 7.99 | 7.99 |
| 23 Jan 2025, 12:28 | 7.85 | 7.85 |
| 11 Dec 2024, 11:44 | 7.69 | 7.69 |
| 1 Nov 2024, 13:01 | 7.71 | 7.71 |
| 4 Oct 2024, 12:07 | 7.62 | 7.62 |
| 6 Sep 2024, 11:30 | 7.68 | 7.68 |
| 2 Aug 2024, 10:48 | 8.02 | 8.02 |
| 11 Jul 2024, 11:37 | 7.78 | 7.78 |
| 12 Jun 2024, 12:34 | 7.94 | 7.94 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.044 mg/l
Sampled 4 Sep 2026, 27 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:13 | 0.044 | 0.044 mg/l |
| 6 Aug 2026, 13:07 | 0.046 | 0.046 mg/l |
| 23 Jul 2026, 14:53 | 0.034 | 0.034 mg/l |
| 4 Jun 2026, 10:45 | 0.089 | 0.089 mg/l |
| 15 May 2026, 13:44 | 0.049 | 0.049 mg/l |
| 27 Apr 2026, 09:38 | 0.051 | 0.051 mg/l |
| 2 Mar 2026, 12:57 | 0.17 | 0.17 mg/l |
| 10 Feb 2026, 11:47 | 0.17 | 0.17 mg/l |
| 5 Jan 2026, 14:09 | 0.067 | 0.067 mg/l |
| 4 Dec 2025, 12:33 | 0.059 | 0.059 mg/l |
| 6 Nov 2025, 12:36 | 0.046 | 0.046 mg/l |
| 13 Oct 2025, 11:06 | 0.058 | 0.058 mg/l |
| 4 Sep 2025, 13:45 | 0.19 | 0.19 mg/l |
| 6 Aug 2025, 11:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jul 2025, 14:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jun 2025, 09:42 | 0.04 | 0.04 mg/l |
| 22 May 2025, 11:16 | 0.053 | 0.053 mg/l |
| 30 Apr 2025, 13:27 | 0.095 | 0.095 mg/l |
| 4 Mar 2025, 13:27 | 0.06 | 0.06 mg/l |
| 13 Feb 2025, 10:09 | 0.048 | 0.048 mg/l |
| 23 Jan 2025, 12:28 | 0.076 | 0.076 mg/l |
| 11 Dec 2024, 11:44 | 0.052 | 0.052 mg/l |
| 1 Nov 2024, 13:01 | 0.057 | 0.057 mg/l |
| 4 Oct 2024, 12:07 | 0.05 | 0.05 mg/l |
| 6 Sep 2024, 11:30 | 0.055 | 0.055 mg/l |
| 2 Aug 2024, 10:48 | 0.038 | 0.038 mg/l |
| 11 Jul 2024, 11:37 | 0.15 | 0.15 mg/l |
| 12 Jun 2024, 12:34 | 0.091 | 0.091 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
18.9 mg/l
Sampled 4 Sep 2026, 27 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:13 | 18.9 | 18.9 mg/l |
| 6 Aug 2026, 13:07 | 18.9 | 18.9 mg/l |
| 23 Jul 2026, 14:53 | 22.9 | 22.9 mg/l |
| 4 Jun 2026, 10:45 | 10.9 | 10.9 mg/l |
| 15 May 2026, 13:44 | 13.9 | 13.9 mg/l |
| 27 Apr 2026, 09:38 | 14.9 | 14.9 mg/l |
| 2 Mar 2026, 12:57 | 9.72 | 9.72 mg/l |
| 10 Feb 2026, 11:47 | 9.64 | 9.64 mg/l |
| 5 Jan 2026, 14:09 | 14.9 | 14.9 mg/l |
| 4 Dec 2025, 12:33 | 13 | 13 mg/l |
| 6 Nov 2025, 12:36 | 14.9 | 14.9 mg/l |
| 13 Oct 2025, 11:06 | 16 | 16 mg/l |
| 4 Sep 2025, 13:45 | 13 | 13 mg/l |
| 6 Aug 2025, 11:46 | 15 | 15 mg/l |
| 3 Jul 2025, 14:00 | 14.9 | 14.9 mg/l |
| 9 Jun 2025, 09:42 | 13.9 | 13.9 mg/l |
| 22 May 2025, 11:16 | 14 | 14 mg/l |
| 30 Apr 2025, 13:27 | 12.9 | 12.9 mg/l |
| 4 Mar 2025, 13:27 | 13 | 13 mg/l |
| 13 Feb 2025, 10:09 | 12 | 12 mg/l |
| 23 Jan 2025, 12:28 | 12.9 | 12.9 mg/l |
| 11 Dec 2024, 11:44 | 11 | 11 mg/l |
| 1 Nov 2024, 13:01 | 15 | 15 mg/l |
| 4 Oct 2024, 12:07 | 14 | 14 mg/l |
| 6 Sep 2024, 11:30 | 16.9 | 16.9 mg/l |
| 2 Aug 2024, 10:48 | 17 | 17 mg/l |
| 11 Jul 2024, 11:37 | 8.03 | 8.03 mg/l |
| 12 Jun 2024, 12:34 | 13.9 | 13.9 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.62 mg/l
Sampled 4 Sep 2026, 27 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:13 | 0.62 | 0.62 mg/l |
| 6 Aug 2026, 13:07 | 0.72 | 0.72 mg/l |
| 23 Jul 2026, 14:53 | 0.81 | 0.81 mg/l |
| 4 Jun 2026, 10:45 | 0.49 | 0.49 mg/l |
| 15 May 2026, 13:44 | 0.78 | 0.78 mg/l |
| 27 Apr 2026, 09:38 | 0.57 | 0.57 mg/l |
| 2 Mar 2026, 12:57 | 0.2 | 0.2 mg/l |
| 10 Feb 2026, 11:47 | 0.12 | 0.12 mg/l |
| 5 Jan 2026, 14:09 | 0.29 | 0.29 mg/l |
| 4 Dec 2025, 12:33 | 0.34 | 0.34 mg/l |
| 6 Nov 2025, 12:36 | 0.33 | 0.33 mg/l |
| 13 Oct 2025, 11:06 | 0.37 | 0.37 mg/l |
| 4 Sep 2025, 13:45 | 0.32 | 0.32 mg/l |
| 6 Aug 2025, 11:46 | 0.38 | 0.38 mg/l |
| 3 Jul 2025, 14:00 | 0.58 | 0.58 mg/l |
| 9 Jun 2025, 09:42 | 0.57 | 0.57 mg/l |
| 22 May 2025, 11:16 | 0.77 | 0.77 mg/l |
| 30 Apr 2025, 13:27 | 0.24 | 0.24 mg/l |
| 4 Mar 2025, 13:27 | 0.082 | 0.082 mg/l |
| 13 Feb 2025, 10:09 | 0.099 | 0.099 mg/l |
| 23 Jan 2025, 12:28 | 0.18 | 0.18 mg/l |
| 11 Dec 2024, 11:44 | 0.11 | 0.11 mg/l |
| 1 Nov 2024, 13:01 | 0.37 | 0.37 mg/l |
| 4 Oct 2024, 12:07 | 0.2 | 0.2 mg/l |
| 6 Sep 2024, 11:30 | 0.56 | 0.56 mg/l |
| 2 Aug 2024, 10:48 | 0.44 | 0.44 mg/l |
| 11 Jul 2024, 11:37 | 0.33 | 0.33 mg/l |
| 12 Jun 2024, 12:34 | 0.39 | 0.39 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
988 µS/cm
Sampled 4 Sep 2026, 27 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:13 | 988 | 988 µS/cm |
| 6 Aug 2026, 13:07 | 1045 | 1045 µS/cm |
| 23 Jul 2026, 14:53 | 1073 | 1073 µS/cm |
| 4 Jun 2026, 10:45 | 910 | 910 µS/cm |
| 15 May 2026, 13:44 | 971 | 971 µS/cm |
| 27 Apr 2026, 09:38 | 982 | 982 µS/cm |
| 2 Mar 2026, 12:57 | 780 | 780 µS/cm |
| 10 Feb 2026, 11:47 | 793 | 793 µS/cm |
| 5 Jan 2026, 14:09 | 1048 | 1048 µS/cm |
| 4 Dec 2025, 12:33 | 990 | 990 µS/cm |
| 6 Nov 2025, 12:36 | 987 | 987 µS/cm |
| 13 Oct 2025, 11:06 | 1048 | 1048 µS/cm |
| 4 Sep 2025, 13:45 | 880 | 880 µS/cm |
| 6 Aug 2025, 11:46 | 1019 | 1019 µS/cm |
| 3 Jul 2025, 14:00 | 989 | 989 µS/cm |
| 9 Jun 2025, 09:42 | 947 | 947 µS/cm |
| 22 May 2025, 11:16 | 964 | 964 µS/cm |
| 30 Apr 2025, 13:27 | 999 | 999 µS/cm |
| 4 Mar 2025, 13:27 | 895 | 895 µS/cm |
| 13 Feb 2025, 10:09 | 797 | 797 µS/cm |
| 23 Jan 2025, 12:28 | 975 | 975 µS/cm |
| 11 Dec 2024, 11:44 | 707 | 707 µS/cm |
| 1 Nov 2024, 13:01 | 926 | 926 µS/cm |
| 4 Oct 2024, 12:07 | 670 | 670 µS/cm |
| 6 Sep 2024, 11:30 | 984 | 984 µS/cm |
| 2 Aug 2024, 10:48 | 1004 | 1004 µS/cm |
| 11 Jul 2024, 11:37 | 675 | 675 µS/cm |
| 12 Jun 2024, 12:34 | 924 | 924 µS/cm |
Everything measured here
12 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 12 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 28 | Jun 2024 – Sep 2026 | 80.1% 4 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 28 | Jun 2024 – Sep 2026 | 7.4 mg/l 4 Sep 2026 |
| Temperature of Water 0076 | River water | 28 | Jun 2024 – Sep 2026 | 19.1 °C 4 Sep 2026 |
| pH 0061 | River water | 28 | Jun 2024 – Sep 2026 | 7.78 4 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 28 | Jun 2024 – Sep 2026 | 0.044 mg/l 4 Sep 2026 |
| Nitrate as N 0117 | River water | 28 | Jun 2024 – Sep 2026 | 18.9 mg/l 4 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 28 | Jun 2024 – Sep 2026 | 0.62 mg/l 4 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 28 | Jun 2024 – Sep 2026 | 988 µS/cm 4 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 28 | Jun 2024 – Sep 2026 | 200 mg/l 4 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 28 | Jun 2024 – Sep 2026 | 0.00095 mg/l 4 Sep 2026 |
| Nitrite as N 0118 | River water | 28 | Jun 2024 – Sep 2026 | 0.065 mg/l 4 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 28 | Jun 2024 – Sep 2026 | 19 mg/l 4 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.