Black Water downstream of Spong Bridge
EA name: BLACK WATER D/S SPONG BRIDGE (also listed as “BLACK WATER D/S SPONG BRIDGE TRIB R.WHITEWATER”)
Environment Agency sampling point AN-WEN111 · 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 Aug 2026, 12:1958 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 9 since 3 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- Pond / lake / reservoir water Planned investigation (local monitoring)
- Where
- National Grid 598978, 319188As published, to the nearest 1 m. Open in a map
- River, by its own name
- Black Water
- River, by the map
- Black WaterPlaced on the river its name gives, 110 m from the line.
- Next gauge downstream
- Swanton Morley On the River Wensum · 5.4 km along the river
- Nearest gauge upstream
- Wendling Beck On the Wendling Beck · 11 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (9 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
95.6%
Sampled 5 Feb 2024, 2.7 years ago · 4 results banked
Also measured in percentage on another sample material (2GZZ): 5 results, kept apart (see the table).
Every result (4)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Feb 2024, 11:32 | 95.6 | 95.6% |
| 11 Dec 2023, 13:37 | 92 | 92% |
| 28 Nov 2023, 12:44 | 94 | 94% |
| 3 Oct 2023, 09:39 | 64.2 | 64.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.1 mg/l
Sampled 5 Feb 2024, 2.7 years ago · 4 results banked
Also measured in milligram per litre on another sample material (2GZZ): 5 results, kept apart (see the table).
Every result (4)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Feb 2024, 11:32 | 11.1 | 11.1 mg/l |
| 11 Dec 2023, 13:37 | 10.8 | 10.8 mg/l |
| 28 Nov 2023, 12:44 | 11.3 | 11.3 mg/l |
| 3 Oct 2023, 09:39 | 6.53 | 6.53 mg/l |
Water temperature
code 0076 · °C
8.9 °C
Sampled 5 Feb 2024, 2.7 years ago · 4 results banked
Also measured in celsius on another sample material (2GZZ): 5 results, kept apart (see the table).
Every result (4)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Feb 2024, 11:32 | 8.9 | 8.9 °C |
| 11 Dec 2023, 13:37 | 8.2 | 8.2 °C |
| 28 Nov 2023, 12:44 | 7.2 | 7.2 °C |
| 3 Oct 2023, 09:39 | 14.5 | 14.5 °C |
pH
code 0061
8.1
Sampled 5 Feb 2024, 2.7 years ago · 4 results banked
Also measured in ph units on another sample material (2GZZ): 5 results, kept apart (see the table).
Every result (4)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Feb 2024, 11:32 | 8.1 | 8.1 |
| 11 Dec 2023, 13:37 | 8.09 | 8.09 |
| 28 Nov 2023, 12:44 | 6.78 | 6.78 |
| 3 Oct 2023, 09:39 | 7.49 | 7.49 |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.043 mg/l
Sampled 5 Feb 2024, 2.7 years ago · 4 results banked
Every result (4)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Feb 2024, 11:32 | 0.043 | 0.043 mg/l |
| 11 Dec 2023, 13:37 | 0.076 | 0.076 mg/l |
| 28 Nov 2023, 12:44 | 0.068 | 0.068 mg/l |
| 3 Oct 2023, 09:39 | 0.062 | 0.062 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
745 µS/cm
Sampled 5 Feb 2024, 2.7 years ago · 4 results banked
Also measured in microsiemens per centimetre on another sample material (2GZZ): 5 results, kept apart (see the table).
Every result (4)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Feb 2024, 11:32 | 745 | 745 µS/cm |
| 11 Dec 2023, 13:37 | 651 | 651 µS/cm |
| 28 Nov 2023, 12:44 | 784 | 784 µS/cm |
| 3 Oct 2023, 09:39 | 463 | 463 µS/cm |
Everything measured here
15 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 20 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 4 | Oct 2023 – Feb 2024 | 95.6% 5 Feb 2024 |
| Oxygen, Dissolved, % Saturation 9901 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 90.7% 4 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 4 | Oct 2023 – Feb 2024 | 11.1 mg/l 5 Feb 2024 |
| Oxygen, Dissolved as O2 9924 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 8.67 mg/l 4 Aug 2026 |
| Temperature of Water 0076 | River water | 4 | Oct 2023 – Feb 2024 | 8.9 °C 5 Feb 2024 |
| Temperature of Water 0076 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 17.4 °C 4 Aug 2026 |
| pH 0061 | River water | 4 | Oct 2023 – Feb 2024 | 8.1 5 Feb 2024 |
| pH 0061 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 8.09 4 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 4 | Oct 2023 – Feb 2024 | 0.043 mg/l 5 Feb 2024 |
| Conductivity at 25 C 0077 | River water | 4 | Oct 2023 – Feb 2024 | 745 µS/cm 5 Feb 2024 |
| Conductivity at 25 C 0077 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 831 µS/cm 4 Aug 2026 |
| Alkalinity, Dissolved as CaCO3 7867 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 290 mg/l 4 Aug 2026 |
| Ammoniacal Nitrogen, Filtered as N 9993 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | below 0.03 mg/l 4 Aug 2026 |
| Chloride, GF/C Filtered 7190 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 58 mg/l 4 Aug 2026 |
| Nitrite, Filtered as N 6485 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | below 0.004 mg/l 4 Aug 2026 |
| Nitrogen, Total as N 9686 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 3.2 mg/l 4 Aug 2026 |
| Nitrogen, Total Oxidised, Filtered as N 9943 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 3 mg/l 4 Aug 2026 |
| Orthophosphate, Filtered as P 9856 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 0.046 mg/l 4 Aug 2026 |
| Phosphorus, Total as P 0348 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 0.063 mg/l 4 Aug 2026 |
| Silicate, Filtered as SiO2 9857 | Pond / lake / reservoir water | 5 | Apr 2026 – Aug 2026 | 9.8 mg/l 4 Aug 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.