Black Water New Forest Spring Cottage
EA name: BLACK WATER NEW FOREST SPRING COTTAGE (also listed as “RSN2101 BLACK WATER NEW FOREST SPRING COTTAGE”)
Environment Agency sampling point SO-RSN2101 · 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 Dec 2023, 13:332.8 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 8 Oct 2026 and had nothing newer.
- Samples banked
- 3 since 5 Oct 2023 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 423473, 105309As published, to the nearest 1 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 13 m from the line.
- Next gauge downstream
- Brockenhurst On the Lymington · 12 km along the river
- Why it was sampled
- Monitoring (national agency policy) (3 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
91.7%
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 13:33 | 91.7 | 91.7% |
| 7 Nov 2023, 16:06 | 90.3 | 90.3% |
| 5 Oct 2023, 14:00 | 73.3 | 73.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.9 mg/l
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 13:33 | 10.9 | 10.9 mg/l |
| 7 Nov 2023, 16:06 | 10.2 | 10.2 mg/l |
| 5 Oct 2023, 14:00 | 7.52 | 7.52 mg/l |
Water temperature
code 0076 · °C
7.8 °C
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 13:33 | 7.8 | 7.8 °C |
| 7 Nov 2023, 16:06 | 9.9 | 9.9 °C |
| 5 Oct 2023, 14:00 | 14.1 | 14.1 °C |
pH
code 0061
5.79
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 13:33 | 5.79 | 5.79 |
| 7 Nov 2023, 16:06 | 5.54 | 5.54 |
| 5 Oct 2023, 14:00 | 6.46 | 6.46 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 13:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Nov 2023, 16:06 | 0.0058 | 0.0058 mg/l |
| 5 Oct 2023, 14:00 | 0.012 | 0.012 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
below 0.196 mg/l (not detected above this)
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 13:33 | <0.196 | below 0.196 mg/l (not detected above this) |
| 7 Nov 2023, 16:06 | 0.038 | 0.038 mg/l |
| 5 Oct 2023, 14:00 | 0.0383 | 0.0383 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.01 mg/l (not detected above this)
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 13:33 | <0.01 | below 0.01 mg/l (not detected above this) |
| 7 Nov 2023, 16:06 | 0.0041 | 0.0041 mg/l |
| 5 Oct 2023, 14:00 | 0.0014 | 0.0014 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
103 µS/cm
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 13:33 | 103 | 103 µS/cm |
| 7 Nov 2023, 16:06 | 118 | 118 µS/cm |
| 5 Oct 2023, 14:00 | 128 | 128 µS/cm |
Everything measured here
16 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 16 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 3 | Oct 2023 – Dec 2023 | 91.7% 4 Dec 2023 |
| Oxygen, Dissolved as O2 9924 | River water | 3 | Oct 2023 – Dec 2023 | 10.9 mg/l 4 Dec 2023 |
| Temperature of Water 0076 | River water | 3 | Oct 2023 – Dec 2023 | 7.8 °C 4 Dec 2023 |
| pH 0061 | River water | 3 | Oct 2023 – Dec 2023 | 5.79 4 Dec 2023 |
| Ammoniacal Nitrogen as N 0111 | River water | 3 | Oct 2023 – Dec 2023 | below 0.03 mg/l 4 Dec 2023 |
| Nitrate as N 0117 | River water | 3 | Oct 2023 – Dec 2023 | below 0.196 mg/l 4 Dec 2023 |
| Orthophosphate, reactive as P 0180 | River water | 3 | Oct 2023 – Dec 2023 | below 0.01 mg/l 4 Dec 2023 |
| Conductivity at 25 C 0077 | River water | 3 | Oct 2023 – Dec 2023 | 103 µS/cm 4 Dec 2023 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 3 | Oct 2023 – Dec 2023 | 7 mg/l 4 Dec 2023 |
| Ammonia un-ionised as N 0119 | River water | 3 | Oct 2023 – Dec 2023 | below 0.00001 mg/l 4 Dec 2023 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 3 | Oct 2023 – Dec 2023 | 18 mg/l 4 Dec 2023 |
| Chloride 0172 | River water | 3 | Oct 2023 – Dec 2023 | 19 mg/l 4 Dec 2023 |
| Nitrite as N 0118 | River water | 3 | Oct 2023 – Dec 2023 | below 0.004 mg/l 4 Dec 2023 |
| Nitrogen, Total Oxidised as N 0116 | River water | 3 | Oct 2023 – Dec 2023 | below 0.2 mg/l 4 Dec 2023 |
| Phosphorus, Total as P 0348 | River water | 3 | Oct 2023 – Dec 2023 | 0.029 mg/l 4 Dec 2023 |
| Silica, reactive as SiO2 0182 | River water | 3 | Oct 2023 – Dec 2023 | 8.7 mg/l 4 Dec 2023 |
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.