Tributary of Mare Brook at Nanscawen Road
EA name: TRIB OF MARE BROOK AT NANSCAWEN ROAD (also listed as “RSN2234 TRIB OF MARE BROOK AT NANSCAWEN ROAD”)
Environment Agency sampling point MD-RSN2234 · 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
- 18 Dec 2025, 10:019 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 30 Sep 2026 and had nothing newer.
- Samples banked
- 24 since 3 Jan 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 414176, 311776As published, to the nearest 1 m. Open in a map
- River, by its own name
- Mare Brook
- River, by the map
- Not placedNo mapped watercourse within 500 m. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
59%
Sampled 18 Dec 2025, 9 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 10:01 | 59 | 59% |
| 27 Nov 2025, 13:27 | 45.7 | 45.7% |
| 24 Oct 2025, 14:07 | 53.5 | 53.5% |
| 30 Sep 2025, 16:33 | 66 | 66% |
| 26 Aug 2025, 10:03 | 54.8 | 54.8% |
| 9 Jul 2025, 07:57 | 49.6 | 49.6% |
| 12 Jun 2025, 08:10 | 55.3 | 55.3% |
| 6 May 2025, 15:29 | 95.3 | 95.3% |
| 2 Apr 2025, 08:06 | 71.9 | 71.9% |
| 4 Mar 2025, 09:39 | 70.2 | 70.2% |
| 4 Feb 2025, 10:05 | 80.5 | 80.5% |
| 7 Jan 2025, 08:41 | 81.4 | 81.4% |
| 4 Dec 2024, 08:58 | 66.1 | 66.1% |
| 12 Nov 2024, 13:02 | 58.2 | 58.2% |
| 3 Oct 2024, 12:59 | 84.7 | 84.7% |
| 2 Sep 2024, 13:09 | 52 | 52% |
| 1 Aug 2024, 12:41 | 61 | 61% |
| 4 Jul 2024, 12:23 | 72.4 | 72.4% |
| 5 Jun 2024, 09:44 | 45.4 | 45.4% |
| 7 May 2024, 13:55 | 81 | 81% |
| 2 Apr 2024, 08:05 | 71.4 | 71.4% |
| 1 Mar 2024, 13:54 | 74.8 | 74.8% |
| 2 Feb 2024, 08:11 | 64.8 | 64.8% |
| 3 Jan 2024, 08:12 | 80.8 | 80.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
6.79 mg/l
Sampled 18 Dec 2025, 9 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 10:01 | 6.79 | 6.79 mg/l |
| 27 Nov 2025, 13:27 | 5.2 | 5.2 mg/l |
| 24 Oct 2025, 14:07 | 6 | 6 mg/l |
| 30 Sep 2025, 16:33 | 7.16 | 7.16 mg/l |
| 26 Aug 2025, 10:03 | 5.35 | 5.35 mg/l |
| 9 Jul 2025, 07:57 | 4.93 | 4.93 mg/l |
| 12 Jun 2025, 08:10 | 5.6 | 5.6 mg/l |
| 6 May 2025, 15:29 | 9.28 | 9.28 mg/l |
| 2 Apr 2025, 08:06 | 8.84 | 8.84 mg/l |
| 4 Mar 2025, 09:39 | 8.9 | 8.9 mg/l |
| 4 Feb 2025, 10:05 | 10 | 10 mg/l |
| 7 Jan 2025, 08:41 | 11.1 | 11.1 mg/l |
| 4 Dec 2024, 08:58 | 8.01 | 8.01 mg/l |
| 12 Nov 2024, 13:02 | 6.78 | 6.78 mg/l |
| 3 Oct 2024, 12:59 | 9.11 | 9.11 mg/l |
| 2 Sep 2024, 13:09 | 5.15 | 5.15 mg/l |
| 1 Aug 2024, 12:41 | 5.68 | 5.68 mg/l |
| 4 Jul 2024, 12:23 | 7.12 | 7.12 mg/l |
| 5 Jun 2024, 09:44 | 4.8 | 4.8 mg/l |
| 7 May 2024, 13:55 | 8.31 | 8.31 mg/l |
| 2 Apr 2024, 08:05 | 8.63 | 8.63 mg/l |
| 1 Mar 2024, 13:54 | 8.99 | 8.99 mg/l |
| 2 Feb 2024, 08:11 | 7.97 | 7.97 mg/l |
| 3 Jan 2024, 08:12 | 9.84 | 9.84 mg/l |
Water temperature
code 0076 · °C
9.1 °C
Sampled 18 Dec 2025, 9 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 10:01 | 9.1 | 9.1 °C |
| 27 Nov 2025, 13:27 | 9.6 | 9.6 °C |
| 24 Oct 2025, 14:07 | 10.2 | 10.2 °C |
| 30 Sep 2025, 16:33 | 11.6 | 11.6 °C |
| 26 Aug 2025, 10:03 | 16.4 | 16.4 °C |
| 9 Jul 2025, 07:57 | 15.5 | 15.5 °C |
| 12 Jun 2025, 08:10 | 14.7 | 14.7 °C |
| 6 May 2025, 15:29 | 16.5 | 16.5 °C |
| 2 Apr 2025, 08:06 | 6.4 | 6.4 °C |
| 4 Mar 2025, 09:39 | 5.2 | 5.2 °C |
| 4 Feb 2025, 10:05 | 5.9 | 5.9 °C |
| 7 Jan 2025, 08:41 | 2.5 | 2.5 °C |
| 4 Dec 2024, 08:58 | 7 | 7 °C |
| 12 Nov 2024, 13:02 | 8.6 | 8.6 °C |
| 3 Oct 2024, 12:59 | 12 | 12 °C |
| 2 Sep 2024, 13:09 | 15.7 | 15.7 °C |
| 1 Aug 2024, 12:41 | 18.7 | 18.7 °C |
| 4 Jul 2024, 12:23 | 16 | 16 °C |
| 5 Jun 2024, 09:44 | 12.7 | 12.7 °C |
| 7 May 2024, 13:55 | 14.1 | 14.1 °C |
| 2 Apr 2024, 08:05 | 7.1 | 7.1 °C |
| 1 Mar 2024, 13:54 | 7.3 | 7.3 °C |
| 2 Feb 2024, 08:11 | 6.4 | 6.4 °C |
| 3 Jan 2024, 08:12 | 6.8 | 6.8 °C |
pH
code 0061
7.66
Sampled 18 Dec 2025, 9 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 10:01 | 7.66 | 7.66 |
| 27 Nov 2025, 13:27 | 7.3 | 7.3 |
| 24 Oct 2025, 14:07 | 7.49 | 7.49 |
| 30 Sep 2025, 16:33 | 7.73 | 7.73 |
| 26 Aug 2025, 10:03 | 7.46 | 7.46 |
| 9 Jul 2025, 07:57 | 6.91 | 6.91 |
| 12 Jun 2025, 08:10 | 7.28 | 7.28 |
| 6 May 2025, 15:29 | 7.82 | 7.82 |
| 2 Apr 2025, 08:06 | 7.79 | 7.79 |
| 4 Mar 2025, 09:39 | 7.66 | 7.66 |
| 4 Feb 2025, 10:05 | 7.51 | 7.51 |
| 7 Jan 2025, 08:41 | 7.57 | 7.57 |
| 4 Dec 2024, 08:58 | 7.46 | 7.46 |
| 12 Nov 2024, 13:02 | 7.49 | 7.49 |
| 3 Oct 2024, 12:59 | 7.48 | 7.48 |
| 2 Sep 2024, 13:09 | 7.13 | 7.13 |
| 1 Aug 2024, 12:41 | 7.32 | 7.32 |
| 4 Jul 2024, 12:23 | 7.19 | 7.19 |
| 5 Jun 2024, 09:44 | 7.18 | 7.18 |
| 7 May 2024, 13:55 | 7.52 | 7.52 |
| 2 Apr 2024, 08:05 | 7.57 | 7.57 |
| 1 Mar 2024, 13:54 | 7.51 | 7.51 |
| 2 Feb 2024, 08:11 | 7.46 | 7.46 |
| 3 Jan 2024, 08:12 | 7.5 | 7.5 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.051 mg/l
Sampled 18 Dec 2025, 9 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 10:01 | 0.051 | 0.051 mg/l |
| 27 Nov 2025, 13:27 | 0.69 | 0.69 mg/l |
| 24 Oct 2025, 14:07 | 0.18 | 0.18 mg/l |
| 30 Sep 2025, 16:33 | 0.034 | 0.034 mg/l |
| 26 Aug 2025, 10:03 | 0.55 | 0.55 mg/l |
| 9 Jul 2025, 07:57 | 0.17 | 0.17 mg/l |
| 12 Jun 2025, 08:10 | 0.22 | 0.22 mg/l |
| 6 May 2025, 15:29 | 0.079 | 0.079 mg/l |
| 2 Apr 2025, 08:06 | 0.049 | 0.049 mg/l |
| 4 Mar 2025, 09:39 | 0.24 | 0.24 mg/l |
| 4 Feb 2025, 10:05 | 0.13 | 0.13 mg/l |
| 7 Jan 2025, 08:41 | 0.034 | 0.034 mg/l |
| 4 Dec 2024, 08:58 | 1.4 | 1.4 mg/l |
| 12 Nov 2024, 13:02 | 0.079 | 0.079 mg/l |
| 3 Oct 2024, 12:59 | 0.043 | 0.043 mg/l |
| 2 Sep 2024, 13:09 | 0.33 | 0.33 mg/l |
| 1 Aug 2024, 12:41 | 0.53 | 0.53 mg/l |
| 4 Jul 2024, 12:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Jun 2024, 09:44 | 0.31 | 0.31 mg/l |
| 7 May 2024, 13:55 | 0.14 | 0.14 mg/l |
| 2 Apr 2024, 08:05 | 0.044 | 0.044 mg/l |
| 1 Mar 2024, 13:54 | 0.15 | 0.15 mg/l |
| 2 Feb 2024, 08:11 | 0.41 | 0.41 mg/l |
| 3 Jan 2024, 08:12 | 0.036 | 0.036 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.07 mg/l
Sampled 18 Dec 2025, 9 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 10:01 | 5.07 | 5.07 mg/l |
| 27 Nov 2025, 13:27 | 4.67 | 4.67 mg/l |
| 24 Oct 2025, 14:07 | 0.846 | 0.846 mg/l |
| 30 Sep 2025, 16:33 | 0.965 | 0.965 mg/l |
| 26 Aug 2025, 10:03 | 1.22 | 1.22 mg/l |
| 9 Jul 2025, 07:57 | 0.193 | 0.193 mg/l |
| 12 Jun 2025, 08:10 | 0.779 | 0.779 mg/l |
| 6 May 2025, 15:29 | 3.77 | 3.77 mg/l |
| 2 Apr 2025, 08:06 | 3.37 | 3.37 mg/l |
| 4 Mar 2025, 09:39 | 4.26 | 4.26 mg/l |
| 4 Feb 2025, 10:05 | 4.07 | 4.07 mg/l |
| 7 Jan 2025, 08:41 | 2.88 | 2.88 mg/l |
| 4 Dec 2024, 08:58 | 4.32 | 4.32 mg/l |
| 12 Nov 2024, 13:02 | 3.06 | 3.06 mg/l |
| 3 Oct 2024, 12:59 | 3.77 | 3.77 mg/l |
| 2 Sep 2024, 13:09 | 2.3 | 2.3 mg/l |
| 1 Aug 2024, 12:41 | 0.628 | 0.628 mg/l |
| 4 Jul 2024, 12:23 | 0.213 | 0.213 mg/l |
| 5 Jun 2024, 09:44 | 1.53 | 1.53 mg/l |
| 7 May 2024, 13:55 | 2.52 | 2.52 mg/l |
| 2 Apr 2024, 08:05 | 2.98 | 2.98 mg/l |
| 1 Mar 2024, 13:54 | 2.16 | 2.16 mg/l |
| 2 Feb 2024, 08:11 | 3.26 | 3.26 mg/l |
| 3 Jan 2024, 08:12 | 1.19 | 1.19 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.36 mg/l
Sampled 18 Dec 2025, 9 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 10:01 | 0.36 | 0.36 mg/l |
| 27 Nov 2025, 13:27 | 1.9 | 1.9 mg/l |
| 24 Oct 2025, 14:07 | 2.4 | 2.4 mg/l |
| 30 Sep 2025, 16:33 | 32 | 32 mg/l |
| 26 Aug 2025, 10:03 | 9.1 | 9.1 mg/l |
| 9 Jul 2025, 07:57 | 3.3 | 3.3 mg/l |
| 12 Jun 2025, 08:10 | 18 | 18 mg/l |
| 6 May 2025, 15:29 | 3.2 | 3.2 mg/l |
| 2 Apr 2025, 08:06 | 5.4 | 5.4 mg/l |
| 4 Mar 2025, 09:39 | 8.2 | 8.2 mg/l |
| 4 Feb 2025, 10:05 | 1.9 | 1.9 mg/l |
| 7 Jan 2025, 08:41 | 0.54 | 0.54 mg/l |
| 4 Dec 2024, 08:58 | 0.42 | 0.42 mg/l |
| 12 Nov 2024, 13:02 | 6.2 | 6.2 mg/l |
| 3 Oct 2024, 12:59 | 0.63 | 0.63 mg/l |
| 2 Sep 2024, 13:09 | 14 | 14 mg/l |
| 1 Aug 2024, 12:41 | 0.82 | 0.82 mg/l |
| 4 Jul 2024, 12:23 | 0.37 | 0.37 mg/l |
| 5 Jun 2024, 09:44 | 0.88 | 0.88 mg/l |
| 7 May 2024, 13:55 | 1.5 | 1.5 mg/l |
| 2 Apr 2024, 08:05 | 1.5 | 1.5 mg/l |
| 1 Mar 2024, 13:54 | 0.27 | 0.27 mg/l |
| 2 Feb 2024, 08:11 | 0.81 | 0.81 mg/l |
| 3 Jan 2024, 08:12 | 0.12 | 0.12 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
488 µS/cm
Sampled 18 Dec 2025, 9 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 10:01 | 488 | 488 µS/cm |
| 27 Nov 2025, 13:27 | 691 | 691 µS/cm |
| 24 Oct 2025, 14:07 | 562 | 562 µS/cm |
| 30 Sep 2025, 16:33 | 534 | 534 µS/cm |
| 26 Aug 2025, 10:03 | 508 | 508 µS/cm |
| 9 Jul 2025, 07:57 | 511 | 511 µS/cm |
| 12 Jun 2025, 08:10 | 449 | 449 µS/cm |
| 6 May 2025, 15:29 | 660 | 660 µS/cm |
| 2 Apr 2025, 08:06 | 815 | 815 µS/cm |
| 4 Mar 2025, 09:39 | 766 | 766 µS/cm |
| 4 Feb 2025, 10:05 | 730 | 730 µS/cm |
| 7 Jan 2025, 08:41 | 342 | 342 µS/cm |
| 4 Dec 2024, 08:58 | 655 | 655 µS/cm |
| 12 Nov 2024, 13:02 | 692 | 692 µS/cm |
| 3 Oct 2024, 12:59 | 498 | 498 µS/cm |
| 2 Sep 2024, 13:09 | 589 | 589 µS/cm |
| 1 Aug 2024, 12:41 | 439 | 439 µS/cm |
| 4 Jul 2024, 12:23 | 421 | 421 µS/cm |
| 5 Jun 2024, 09:44 | 467 | 467 µS/cm |
| 7 May 2024, 13:55 | 572 | 572 µS/cm |
| 2 Apr 2024, 08:05 | 638 | 638 µS/cm |
| 1 Mar 2024, 13:54 | 593 | 593 µS/cm |
| 2 Feb 2024, 08:11 | 783 | 783 µS/cm |
| 3 Jan 2024, 08:12 | 286 | 286 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 | 24 | Jan 2024 – Dec 2025 | 59% 18 Dec 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jan 2024 – Dec 2025 | 6.79 mg/l 18 Dec 2025 |
| Temperature of Water 0076 | River water | 24 | Jan 2024 – Dec 2025 | 9.1 °C 18 Dec 2025 |
| pH 0061 | River water | 24 | Jan 2024 – Dec 2025 | 7.66 18 Dec 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jan 2024 – Dec 2025 | 0.051 mg/l 18 Dec 2025 |
| Nitrate as N 0117 | River water | 24 | Jan 2024 – Dec 2025 | 5.07 mg/l 18 Dec 2025 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Jan 2024 – Dec 2025 | 0.36 mg/l 18 Dec 2025 |
| Conductivity at 25 C 0077 | River water | 24 | Jan 2024 – Dec 2025 | 488 µS/cm 18 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jan 2024 – Dec 2025 | 160 mg/l 18 Dec 2025 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jan 2024 – Dec 2025 | 0.0004 mg/l 18 Dec 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 24 | Jan 2024 – Dec 2025 | 5.9 mg/l 18 Dec 2025 |
| Chloride 0172 | River water | 24 | Jan 2024 – Dec 2025 | 28 mg/l 18 Dec 2025 |
| Flow Type 2896 | River water | 13 | Oct 2024 – Dec 2025 | Moderate Flow 18 Dec 2025 |
| Nitrite as N 0118 | River water | 24 | Jan 2024 – Dec 2025 | 0.032 mg/l 18 Dec 2025 |
| Nitrogen, Total as N 9686 | River water | 23 | Jan 2024 – Dec 2025 | 6.5 mg/l 18 Dec 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Jan 2024 – Dec 2025 | 5.1 mg/l 18 Dec 2025 |
| Phosphorus, Total as P 0348 | River water | 23 | Jan 2024 – Dec 2025 | 0.41 mg/l 18 Dec 2025 |
| Silica, reactive as SiO2 0182 | River water | 24 | Jan 2024 – Dec 2025 | 7.8 mg/l 18 Dec 2025 |
| Solids, Suspended at 105 C 0135 | River water | 1 | Dec 2025 – Dec 2025 | 29 mg/l 18 Dec 2025 |
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.