440YD downstream of Horsmonden sewage treatment works
EA name: 440YD D/S HORSMONDEN STW (also listed as “RIVER TEISE QUARTER MILE DOWNSTREAM HORSMONDEN SEWAGE WORKS”)
Environment Agency sampling point SO-E0000631 · 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 Mar 2024, 12:442.6 years 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 26 Oct 2026 and had nothing newer.
- Samples banked
- 6 since 11 Oct 2023 Imported periods: 1 Oct 2023 – 26 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 572313, 140642As published, to the nearest 1 m. Open in a map
- River, by its own name
- Teise Quarter Mile
- River, by the map
- River TeisePlaced on a river whose name partly matches its own, 18 m from the line.
- Next gauge downstream
- Teston On the River Medway · 18 km along the riverTESTON GS 18 km along the river
- Nearest gauge upstream
- STONE BRIDGE GS 1.0 km along the river
- Why it was sampled
- Monitoring (national agency policy) (4 samples)
Environmental monitoring statutory (EU directives) (2 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
97.1%
Sampled 11 Mar 2024, 2.6 years ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2024, 12:44 | 97.1 | 97.1% |
| 8 Feb 2024, 12:36 | 96.2 | 96.2% |
| 18 Jan 2024, 10:06 | 94.8 | 94.8% |
| 8 Dec 2023, 11:58 | 97.8 | 97.8% |
| 1 Nov 2023, 11:47 | 93.9 | 93.9% |
| 11 Oct 2023, 13:34 | 95.3 | 95.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.3 mg/l
Sampled 11 Mar 2024, 2.6 years ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2024, 12:44 | 11.3 | 11.3 mg/l |
| 8 Feb 2024, 12:36 | 11.3 | 11.3 mg/l |
| 18 Jan 2024, 10:06 | 12.8 | 12.8 mg/l |
| 8 Dec 2023, 11:58 | 11.7 | 11.7 mg/l |
| 1 Nov 2023, 11:47 | 10.1 | 10.1 mg/l |
| 11 Oct 2023, 13:34 | 9.26 | 9.26 mg/l |
Water temperature
code 0076 · °C
8.5 °C
Sampled 11 Mar 2024, 2.6 years ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2024, 12:44 | 8.5 | 8.5 °C |
| 8 Feb 2024, 12:36 | 8.3 | 8.3 °C |
| 18 Jan 2024, 10:06 | 2.7 | 2.7 °C |
| 8 Dec 2023, 11:58 | 7.5 | 7.5 °C |
| 1 Nov 2023, 11:47 | 12.2 | 12.2 °C |
| 11 Oct 2023, 13:34 | 16.6 | 16.6 °C |
pH
code 0061
7.58
Sampled 11 Mar 2024, 2.6 years ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2024, 12:44 | 7.58 | 7.58 |
| 8 Feb 2024, 12:36 | 7.2 | 7.2 |
| 18 Jan 2024, 10:06 | 7.58 | 7.58 |
| 8 Dec 2023, 11:58 | 7.62 | 7.62 |
| 1 Nov 2023, 11:47 | 7.55 | 7.55 |
| 11 Oct 2023, 13:34 | 7.78 | 7.78 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.098 mg/l
Sampled 11 Mar 2024, 2.6 years ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2024, 12:44 | 0.098 | 0.098 mg/l |
| 8 Feb 2024, 12:36 | 0.16 | 0.16 mg/l |
| 18 Jan 2024, 10:06 | 0.14 | 0.14 mg/l |
| 8 Dec 2023, 11:58 | 0.047 | 0.047 mg/l |
| 1 Nov 2023, 11:47 | 0.042 | 0.042 mg/l |
| 11 Oct 2023, 13:34 | 0.082 | 0.082 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.79 mg/l
Sampled 11 Mar 2024, 2.6 years ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2024, 12:44 | 1.79 | 1.79 mg/l |
| 8 Feb 2024, 12:36 | 2.38 | 2.38 mg/l |
| 18 Jan 2024, 10:06 | 3.58 | 3.58 mg/l |
| 8 Dec 2023, 11:58 | 2.39 | 2.39 mg/l |
| 1 Nov 2023, 11:47 | 4.18 | 4.18 mg/l |
| 11 Oct 2023, 13:34 | 1.48 | 1.48 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.024 mg/l
Sampled 11 Mar 2024, 2.6 years ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2024, 12:44 | 0.024 | 0.024 mg/l |
| 8 Feb 2024, 12:36 | 0.11 | 0.11 mg/l |
| 18 Jan 2024, 10:06 | 0.04 | 0.04 mg/l |
| 8 Dec 2023, 11:58 | 0.022 | 0.022 mg/l |
| 1 Nov 2023, 11:47 | 0.059 | 0.059 mg/l |
| 11 Oct 2023, 13:34 | 0.03 | 0.03 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
218 µS/cm
Sampled 11 Mar 2024, 2.6 years ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2024, 12:44 | 218 | 218 µS/cm |
| 8 Feb 2024, 12:36 | 260 | 260 µS/cm |
| 18 Jan 2024, 10:06 | 283 | 283 µS/cm |
| 8 Dec 2023, 11:58 | 255 | 255 µS/cm |
| 1 Nov 2023, 11:47 | 281 | 281 µS/cm |
| 11 Oct 2023, 13:34 | 307 | 307 µS/cm |
Everything measured here
19 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 19 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 6 | Oct 2023 – Mar 2024 | 97.1% 11 Mar 2024 |
| Oxygen, Dissolved as O2 9924 | River water | 6 | Oct 2023 – Mar 2024 | 11.3 mg/l 11 Mar 2024 |
| Temperature of Water 0076 | River water | 6 | Oct 2023 – Mar 2024 | 8.5 °C 11 Mar 2024 |
| pH 0061 | River water | 6 | Oct 2023 – Mar 2024 | 7.58 11 Mar 2024 |
| Ammoniacal Nitrogen as N 0111 | River water | 6 | Oct 2023 – Mar 2024 | 0.098 mg/l 11 Mar 2024 |
| Nitrate as N 0117 | River water | 6 | Oct 2023 – Mar 2024 | 1.79 mg/l 11 Mar 2024 |
| Orthophosphate, reactive as P 0180 | River water | 6 | Oct 2023 – Mar 2024 | 0.024 mg/l 11 Mar 2024 |
| Conductivity at 25 C 0077 | River water | 6 | Oct 2023 – Mar 2024 | 218 µS/cm 11 Mar 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 6 | Oct 2023 – Mar 2024 | 51 mg/l 11 Mar 2024 |
| Ammonia un-ionised as N 0119 | River water | 6 | Oct 2023 – Mar 2024 | 0.00062 mg/l 11 Mar 2024 |
| Cadmium, Dissolved 0106 | River water | 2 | Oct 2023 – Jan 2024 | 0.025 µg/l 18 Jan 2024 |
| Calcium, Dissolved 0239 | River water | 2 | Oct 2023 – Jan 2024 | 27 mg/l 18 Jan 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 2 | Oct 2023 – Jan 2024 | 3.4 mg/l 18 Jan 2024 |
| Magnesium, Dissolved 0235 | River water | 2 | Oct 2023 – Jan 2024 | 4.5 mg/l 18 Jan 2024 |
| Mercury, Dissolved 0103 | River water | 2 | Oct 2023 – Jan 2024 | below 0.01 µg/l 18 Jan 2024 |
| Nickel : BLM Bioavailable 3878 | River water | 2 | Oct 2023 – Jan 2024 | 1.5 µg/l 18 Jan 2024 |
| Nickel, Dissolved 3410 | River water | 2 | Oct 2023 – Jan 2024 | 3.3 µg/l 18 Jan 2024 |
| Nitrite as N 0118 | River water | 6 | Oct 2023 – Mar 2024 | 0.014 mg/l 11 Mar 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 6 | Oct 2023 – Mar 2024 | 1.8 mg/l 11 Mar 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.