Herons Farm - Roding
EA name: HERONS FARM - RODING
Environment Agency sampling point TH-SSN1427 · 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
- 10 Dec 2024, 10:3022 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 8 Oct 2026 and had nothing newer.
- Samples banked
- 14 since 10 Jan 2024 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 556658, 205303As published, to the nearest 1 m. Open in a map
- River, by its own name
- Herons Farm
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 1 m from the line.
- Next gauge downstream
- High Ongar On the River Roding · 1.6 km along the river
- Why it was sampled
- Monitoring (national agency policy) (14 samples)
3 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
88.7%
Sampled 10 Dec 2024, 22 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 10:30 | 88.7 | 88.7% |
| 1 Nov 2024, 11:05 | 73.6 | 73.6% |
| 4 Oct 2024, 12:38 | 87.3 | 87.3% |
| 18 Sep 2024, 12:06 | 26.8 | 26.8% |
| 13 Jun 2024, 09:59 | 84.7 | 84.7% |
| 1 May 2024, 14:33 | 104.9 | 104.9% |
| 9 Apr 2024, 10:55 | 92.3 | 92.3% |
| 12 Mar 2024, 12:16 | 97 | 97% |
| 6 Feb 2024, 13:52 | 93.1 | 93.1% |
| 10 Jan 2024, 09:54 | 93.3 | 93.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.8 mg/l
Sampled 10 Dec 2024, 22 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 10:30 | 10.8 | 10.8 mg/l |
| 1 Nov 2024, 11:05 | 7.97 | 7.97 mg/l |
| 4 Oct 2024, 12:38 | 9.38 | 9.38 mg/l |
| 18 Sep 2024, 12:06 | 2.67 | 2.67 mg/l |
| 13 Jun 2024, 09:59 | 9 | 9 mg/l |
| 1 May 2024, 14:33 | 11 | 11 mg/l |
| 9 Apr 2024, 10:55 | 10.1 | 10.1 mg/l |
| 12 Mar 2024, 12:16 | 11.4 | 11.4 mg/l |
| 6 Feb 2024, 13:52 | 10.6 | 10.6 mg/l |
| 10 Jan 2024, 09:54 | 12.5 | 12.5 mg/l |
Water temperature
code 0076 · °C
6.9 °C
Sampled 10 Dec 2024, 22 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 10:30 | 6.9 | 6.9 °C |
| 1 Nov 2024, 11:05 | 11.7 | 11.7 °C |
| 4 Oct 2024, 12:38 | 12 | 12 °C |
| 18 Sep 2024, 12:06 | 15.4 | 15.4 °C |
| 13 Jun 2024, 09:59 | 12.5 | 12.5 °C |
| 1 May 2024, 14:33 | 13 | 13 °C |
| 9 Apr 2024, 10:55 | 11.4 | 11.4 °C |
| 12 Mar 2024, 12:16 | 8.2 | 8.2 °C |
| 6 Feb 2024, 13:52 | 9.7 | 9.7 °C |
| 10 Jan 2024, 09:54 | 3.1 | 3.1 °C |
pH
code 0061
8.01
Sampled 10 Dec 2024, 22 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 10:30 | 8.01 | 8.01 |
| 1 Nov 2024, 11:05 | 7.88 | 7.88 |
| 4 Oct 2024, 12:38 | 7.83 | 7.83 |
| 18 Sep 2024, 12:06 | 7.49 | 7.49 |
| 13 Jun 2024, 09:59 | 8.06 | 8.06 |
| 1 May 2024, 14:33 | 8.18 | 8.18 |
| 9 Apr 2024, 10:55 | 8.11 | 8.11 |
| 12 Mar 2024, 12:16 | 8.17 | 8.17 |
| 6 Feb 2024, 13:52 | 8.2 | 8.2 |
| 10 Jan 2024, 09:54 | 8.2 | 8.2 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 10 Dec 2024, 22 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 10:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Nov 2024, 11:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Oct 2024, 12:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Sep 2024, 12:06 | 0.26 | 0.26 mg/l |
| 13 Jun 2024, 09:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 May 2024, 14:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Apr 2024, 10:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Mar 2024, 12:16 | 0.036 | 0.036 mg/l |
| 6 Feb 2024, 13:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Jan 2024, 09:54 | 0.045 | 0.045 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
16 mg/l
Sampled 10 Dec 2024, 22 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 10:30 | 16 | 16 mg/l |
| 1 Nov 2024, 11:05 | 3.99 | 3.99 mg/l |
| 4 Oct 2024, 12:38 | 4.48 | 4.48 mg/l |
| 18 Sep 2024, 12:06 | <0.196 | below 0.196 mg/l (not detected above this) |
| 13 Jun 2024, 09:59 | 4.59 | 4.59 mg/l |
| 1 May 2024, 14:33 | 9.74 | 9.74 mg/l |
| 9 Apr 2024, 10:55 | 5.39 | 5.39 mg/l |
| 12 Mar 2024, 12:16 | 7.17 | 7.17 mg/l |
| 6 Feb 2024, 13:52 | 7.28 | 7.28 mg/l |
| 10 Jan 2024, 09:54 | 9.68 | 9.68 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.074 mg/l
Sampled 10 Dec 2024, 22 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 10:30 | 0.074 | 0.074 mg/l |
| 1 Nov 2024, 11:05 | 0.054 | 0.054 mg/l |
| 4 Oct 2024, 12:38 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 Sep 2024, 12:06 | 0.015 | 0.015 mg/l |
| 13 Jun 2024, 09:59 | 0.061 | 0.061 mg/l |
| 1 May 2024, 14:33 | 0.04 | 0.04 mg/l |
| 9 Apr 2024, 10:55 | 0.023 | 0.023 mg/l |
| 12 Mar 2024, 12:16 | 0.061 | 0.061 mg/l |
| 6 Feb 2024, 13:52 | 0.065 | 0.065 mg/l |
| 10 Jan 2024, 09:54 | 0.059 | 0.059 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
719 µS/cm
Sampled 10 Dec 2024, 22 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Dec 2024, 10:30 | 719 | 719 µS/cm |
| 1 Nov 2024, 11:05 | 823 | 823 µS/cm |
| 4 Oct 2024, 12:38 | 896 | 896 µS/cm |
| 18 Sep 2024, 12:06 | 889 | 889 µS/cm |
| 13 Jun 2024, 09:59 | 828 | 828 µS/cm |
| 1 May 2024, 14:33 | 776 | 776 µS/cm |
| 9 Apr 2024, 10:55 | 768 | 768 µS/cm |
| 12 Mar 2024, 12:16 | 694 | 694 µS/cm |
| 6 Feb 2024, 13:52 | 835 | 835 µS/cm |
| 10 Jan 2024, 09:54 | 763 | 763 µS/cm |
Everything measured here
24 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 24 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 10 | Jan 2024 – Dec 2024 | 88.7% 10 Dec 2024 |
| Oxygen, Dissolved as O2 9924 | River water | 10 | Jan 2024 – Dec 2024 | 10.8 mg/l 10 Dec 2024 |
| Temperature of Water 0076 | River water | 10 | Jan 2024 – Dec 2024 | 6.9 °C 10 Dec 2024 |
| pH 0061 | River water | 10 | Jan 2024 – Dec 2024 | 8.01 10 Dec 2024 |
| Ammoniacal Nitrogen as N 0111 | River water | 10 | Jan 2024 – Dec 2024 | below 0.03 mg/l 10 Dec 2024 |
| Nitrate as N 0117 | River water | 10 | Jan 2024 – Dec 2024 | 16 mg/l 10 Dec 2024 |
| Orthophosphate, reactive as P 0180 | River water | 10 | Jan 2024 – Dec 2024 | 0.074 mg/l 10 Dec 2024 |
| Conductivity at 25 C 0077 | River water | 10 | Jan 2024 – Dec 2024 | 719 µS/cm 10 Dec 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 10 | Jan 2024 – Dec 2024 | 240 mg/l 10 Dec 2024 |
| Ammonia un-ionised as N 0119 | River water | 10 | Jan 2024 – Dec 2024 | below 0.00044 mg/l 10 Dec 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 3 | Sep 2024 – Nov 2024 | 3.9 mg/l 1 Nov 2024 |
| Chloride 0172 | River water | 10 | Jan 2024 – Dec 2024 | 24 mg/l 10 Dec 2024 |
| eDNA Report 3047 | River water | 1 | May 2024 – May 2024 | 1 text result 10 May 2024 |
| Environmental DNA Filtration 3064 | River water | 1 | May 2024 – May 2024 | DNA Stored 10 May 2024 |
| Flow Type 2896 | River water | 11 | Jan 2024 – Dec 2024 | High Flow 10 Dec 2024 |
| Mitochondrial marker : Fish 12S 2857 | River water | 1 | May 2024 – May 2024 | Not found 10 May 2024 |
| Nitrite as N 0118 | River water | 10 | Jan 2024 – Dec 2024 | 0.018 mg/l 10 Dec 2024 |
| Nitrogen, Total as N 9686 | River water | 10 | Jan 2024 – Dec 2024 | 17 mg/l 10 Dec 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 10 | Jan 2024 – Dec 2024 | 16 mg/l 10 Dec 2024 |
| No flow /No sample 7668 | River water | 3 | Jul 2024 – Aug 2024 | No flow/discharge at sampling point 9 Aug 2024 |
| Phosphorus, Total as P 0348 | River water | 9 | Jan 2024 – Nov 2024 | 0.079 mg/l 1 Nov 2024 |
| Preparation: DNA 5923 | River water | 1 | May 2024 – May 2024 | Done 10 May 2024 |
| Silica, reactive as SiO2 0182 | River water | 10 | Jan 2024 – Dec 2024 | 8.1 mg/l 10 Dec 2024 |
| Solids, Suspended at 105 C 0135 | River water | 10 | Jan 2024 – Dec 2024 | 12 mg/l 10 Dec 2024 |
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.