Downstream of Tenterden sewage treatment works
EA name: D/S TENTERDEN STW (also listed as “NEWMILL CHANNEL 100M DOWNSTREAM TENTERDEN SEWAGE WORKS”)
Environment Agency sampling point SO-E0001673 · 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
- 14 Sep 2026, 08:5117 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 8 since 4 Dec 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (UK govt policy - not GQA or RE)
- Where
- National Grid 586719, 132077As published, to the nearest 1 m. Open in a map
- River, by its own name
- Newmill Channel
- River, by the map
- Newmill ChannelPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Why it was sampled
- Monitoring (UK govt policy - not GQA or RE) (6 samples)
Environmental monitoring statutory (EU directives) (2 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
44.4%
Sampled 14 Sep 2026, 17 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Sep 2026, 08:51 | 44.4 | 44.4% |
| 6 Aug 2026, 08:44 | 33.3 | 33.3% |
| 2 Jul 2026, 12:12 | 76.7 | 76.7% |
| 5 Jun 2026, 14:20 | 81.4 | 81.4% |
| 13 May 2026, 10:09 | 91.5 | 91.5% |
| 27 Apr 2026, 10:12 | 93.8 | 93.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
4.2 mg/l
Sampled 14 Sep 2026, 17 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Sep 2026, 08:51 | 4.2 | 4.2 mg/l |
| 6 Aug 2026, 08:44 | 3.2 | 3.2 mg/l |
| 2 Jul 2026, 12:12 | 7.11 | 7.11 mg/l |
| 5 Jun 2026, 14:20 | 7.95 | 7.95 mg/l |
| 13 May 2026, 10:09 | 10.2 | 10.2 mg/l |
| 27 Apr 2026, 10:12 | 10.4 | 10.4 mg/l |
Water temperature
code 0076 · °C
17.9 °C
Sampled 14 Sep 2026, 17 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Sep 2026, 08:51 | 17.9 | 17.9 °C |
| 6 Aug 2026, 08:44 | 17.2 | 17.2 °C |
| 2 Jul 2026, 12:12 | 18.9 | 18.9 °C |
| 5 Jun 2026, 14:20 | 16.4 | 16.4 °C |
| 13 May 2026, 10:09 | 10.4 | 10.4 °C |
| 27 Apr 2026, 10:12 | 10.6 | 10.6 °C |
pH
code 0061
7.03
Sampled 14 Sep 2026, 17 days ago · 8 results banked
Every result (8)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Sep 2026, 08:51 | 7.03 | 7.03 |
| 6 Aug 2026, 08:44 | 6.67 | 6.67 |
| 2 Jul 2026, 12:12 | 7.59 | 7.59 |
| 5 Jun 2026, 14:20 | 7.22 | 7.22 |
| 13 May 2026, 10:09 | 7.9 | 7.9 |
| 27 Apr 2026, 10:12 | 7.88 | 7.88 |
| 20 Mar 2024, 08:34 | 7.96 | 7.96 |
| 4 Dec 2023, 09:53 | 7.45 | 7.45 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.16 mg/l
Sampled 14 Sep 2026, 17 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Sep 2026, 08:51 | 0.16 | 0.16 mg/l |
| 6 Aug 2026, 08:44 | 0.26 | 0.26 mg/l |
| 2 Jul 2026, 12:12 | 0.093 | 0.093 mg/l |
| 5 Jun 2026, 14:20 | 0.47 | 0.47 mg/l |
| 13 May 2026, 10:09 | 0.064 | 0.064 mg/l |
| 27 Apr 2026, 10:12 | 0.03 | 0.03 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
18.8 mg/l
Sampled 14 Sep 2026, 17 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Sep 2026, 08:51 | 18.8 | 18.8 mg/l |
| 6 Aug 2026, 08:44 | 22.7 | 22.7 mg/l |
| 2 Jul 2026, 12:12 | 0.585 | 0.585 mg/l |
| 5 Jun 2026, 14:20 | 17.8 | 17.8 mg/l |
| 13 May 2026, 10:09 | 2.38 | 2.38 mg/l |
| 27 Apr 2026, 10:12 | 2.29 | 2.29 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.16 mg/l
Sampled 14 Sep 2026, 17 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Sep 2026, 08:51 | 0.16 | 0.16 mg/l |
| 6 Aug 2026, 08:44 | 0.24 | 0.24 mg/l |
| 2 Jul 2026, 12:12 | 0.06 | 0.06 mg/l |
| 5 Jun 2026, 14:20 | 0.26 | 0.26 mg/l |
| 13 May 2026, 10:09 | 0.042 | 0.042 mg/l |
| 27 Apr 2026, 10:12 | 0.029 | 0.029 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
784 µS/cm
Sampled 14 Sep 2026, 17 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Sep 2026, 08:51 | 784 | 784 µS/cm |
| 6 Aug 2026, 08:44 | 873 | 873 µS/cm |
| 2 Jul 2026, 12:12 | 545 | 545 µS/cm |
| 5 Jun 2026, 14:20 | 720 | 720 µS/cm |
| 13 May 2026, 10:09 | 549 | 549 µS/cm |
| 27 Apr 2026, 10:12 | 523 | 523 µS/cm |
Everything measured here
18 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 18 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 6 | Apr 2026 – Sep 2026 | 44.4% 14 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 6 | Apr 2026 – Sep 2026 | 4.2 mg/l 14 Sep 2026 |
| Temperature of Water 0076 | River water | 6 | Apr 2026 – Sep 2026 | 17.9 °C 14 Sep 2026 |
| pH 0061 | River water | 8 | Dec 2023 – Sep 2026 | 7.03 14 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 6 | Apr 2026 – Sep 2026 | 0.16 mg/l 14 Sep 2026 |
| Nitrate as N 0117 | River water | 6 | Apr 2026 – Sep 2026 | 18.8 mg/l 14 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 6 | Apr 2026 – Sep 2026 | 0.16 mg/l 14 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 6 | Apr 2026 – Sep 2026 | 784 µS/cm 14 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 6 | Apr 2026 – Sep 2026 | 72 mg/l 14 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 6 | Apr 2026 – Sep 2026 | 0.00057 mg/l 14 Sep 2026 |
| Calcium, Dissolved 0239 | River water | 2 | Dec 2023 – Mar 2024 | 42 mg/l 20 Mar 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 2 | Dec 2023 – Mar 2024 | 6.8 mg/l 20 Mar 2024 |
| Lead : BLM Bioavailable 3377 | River water | 2 | Dec 2023 – Mar 2024 | 0.03 µg/l 20 Mar 2024 |
| Lead, Dissolved 0052 | River water | 2 | Dec 2023 – Mar 2024 | 0.23 µg/l 20 Mar 2024 |
| Nickel : BLM Bioavailable 3878 | River water | 2 | Dec 2023 – Mar 2024 | 1.5 µg/l 20 Mar 2024 |
| Nickel, Dissolved 3410 | River water | 2 | Dec 2023 – Mar 2024 | 4.1 µg/l 20 Mar 2024 |
| Nitrite as N 0118 | River water | 6 | Apr 2026 – Sep 2026 | 0.17 mg/l 14 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 6 | Apr 2026 – Sep 2026 | 19 mg/l 14 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.