Hollowell Brook Crow Lane Road Bridge
EA name: HOLLOWELL BK.CROW LANE RD.BR.
Environment Agency sampling point AN-HOLL100C · 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
- 28 May 2026, 09:464 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 19 Jun 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 468287, 273893As 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
- Spratton Brook (Hollowell Arm)Placed by position alone, on a line whose map name differs from its own, 0 m from the line.
- Next gauge downstream
- Geldharts Mill On the River Nene · 14 km along the river
- Why it was sampled
- Monitoring (national agency policy) (12 samples)
Environmental monitoring statutory (EU directives) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
91.3%
Sampled 28 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:46 | 91.3 | 91.3% |
| 1 Apr 2026, 11:20 | 97.8 | 97.8% |
| 6 Mar 2026, 13:40 | 97.5 | 97.5% |
| 19 Feb 2026, 12:37 | 98.1 | 98.1% |
| 2 Jan 2026, 14:36 | 96.6 | 96.6% |
| 12 Dec 2025, 11:50 | 95.1 | 95.1% |
| 12 Nov 2025, 13:18 | 94.6 | 94.6% |
| 3 Oct 2025, 12:20 | 91.7 | 91.7% |
| 1 Sep 2025, 10:08 | 91.2 | 91.2% |
| 8 Aug 2025, 10:47 | 91.6 | 91.6% |
| 15 Jul 2025, 11:57 | 87.6 | 87.6% |
| 20 Jun 2025, 11:43 | 92.6 | 92.6% |
| 9 May 2025, 10:53 | 95.5 | 95.5% |
| 23 Apr 2025, 14:02 | 97 | 97% |
| 18 Mar 2025, 11:01 | 100.5 | 100.5% |
| 17 Feb 2025, 13:51 | 102.2 | 102.2% |
| 28 Jan 2025, 12:57 | 100.1 | 100.1% |
| 9 Dec 2024, 10:31 | 98.1 | 98.1% |
| 25 Nov 2024, 10:27 | 96.4 | 96.4% |
| 15 Oct 2024, 14:30 | 98.3 | 98.3% |
| 23 Sep 2024, 13:48 | 98.5 | 98.5% |
| 19 Aug 2024, 13:46 | 96.4 | 96.4% |
| 15 Jul 2024, 10:09 | 96.4 | 96.4% |
| 19 Jun 2024, 11:54 | 96 | 96% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.22 mg/l
Sampled 28 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:46 | 9.22 | 9.22 mg/l |
| 1 Apr 2026, 11:20 | 11.2 | 11.2 mg/l |
| 6 Mar 2026, 13:40 | 11.5 | 11.5 mg/l |
| 19 Feb 2026, 12:37 | 12.4 | 12.4 mg/l |
| 2 Jan 2026, 14:36 | 12.6 | 12.6 mg/l |
| 12 Dec 2025, 11:50 | 10.9 | 10.9 mg/l |
| 12 Nov 2025, 13:18 | 10.2 | 10.2 mg/l |
| 3 Oct 2025, 12:20 | 9.62 | 9.62 mg/l |
| 1 Sep 2025, 10:08 | 9.33 | 9.33 mg/l |
| 8 Aug 2025, 10:47 | 9.15 | 9.15 mg/l |
| 15 Jul 2025, 11:57 | 8.81 | 8.81 mg/l |
| 20 Jun 2025, 11:43 | 8.91 | 8.91 mg/l |
| 9 May 2025, 10:53 | 11.1 | 11.1 mg/l |
| 23 Apr 2025, 14:02 | 10.9 | 10.9 mg/l |
| 18 Mar 2025, 11:01 | 12.9 | 12.9 mg/l |
| 17 Feb 2025, 13:51 | 13.4 | 13.4 mg/l |
| 28 Jan 2025, 12:57 | 12.3 | 12.3 mg/l |
| 9 Dec 2024, 10:31 | 11.8 | 11.8 mg/l |
| 25 Nov 2024, 10:27 | 11.1 | 11.1 mg/l |
| 15 Oct 2024, 14:30 | 10.7 | 10.7 mg/l |
| 23 Sep 2024, 13:48 | 9.93 | 9.93 mg/l |
| 19 Aug 2024, 13:46 | 9.95 | 9.95 mg/l |
| 15 Jul 2024, 10:09 | 10.2 | 10.2 mg/l |
| 19 Jun 2024, 11:54 | 10.2 | 10.2 mg/l |
Water temperature
code 0076 · °C
14.8 °C
Sampled 28 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:46 | 14.8 | 14.8 °C |
| 1 Apr 2026, 11:20 | 9.3 | 9.3 °C |
| 6 Mar 2026, 13:40 | 8.1 | 8.1 °C |
| 19 Feb 2026, 12:37 | 5.5 | 5.5 °C |
| 2 Jan 2026, 14:36 | 4 | 4 °C |
| 12 Dec 2025, 11:50 | 9.4 | 9.4 °C |
| 12 Nov 2025, 13:18 | 12 | 12 °C |
| 3 Oct 2025, 12:20 | 13.1 | 13.1 °C |
| 1 Sep 2025, 10:08 | 14.2 | 14.2 °C |
| 8 Aug 2025, 10:47 | 15.3 | 15.3 °C |
| 15 Jul 2025, 11:57 | 15 | 15 °C |
| 20 Jun 2025, 11:43 | 17.1 | 17.1 °C |
| 9 May 2025, 10:53 | 8.8 | 8.8 °C |
| 23 Apr 2025, 14:02 | 10.2 | 10.2 °C |
| 18 Mar 2025, 11:01 | 4.7 | 4.7 °C |
| 17 Feb 2025, 13:51 | 4 | 4 °C |
| 28 Jan 2025, 12:57 | 6.3 | 6.3 °C |
| 9 Dec 2024, 10:31 | 7.2 | 7.2 °C |
| 25 Nov 2024, 10:27 | 9.2 | 9.2 °C |
| 15 Oct 2024, 14:30 | 11.3 | 11.3 °C |
| 23 Sep 2024, 13:48 | 14.9 | 14.9 °C |
| 19 Aug 2024, 13:46 | 13.8 | 13.8 °C |
| 15 Jul 2024, 10:09 | 12.7 | 12.7 °C |
| 19 Jun 2024, 11:54 | 12.5 | 12.5 °C |
pH
code 0061
8.33
Sampled 28 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:46 | 8.33 | 8.33 |
| 1 Apr 2026, 11:20 | 8.4 | 8.4 |
| 6 Mar 2026, 13:40 | 8.03 | 8.03 |
| 19 Feb 2026, 12:37 | 7.85 | 7.85 |
| 2 Jan 2026, 14:36 | 8.21 | 8.21 |
| 12 Dec 2025, 11:50 | 7.86 | 7.86 |
| 12 Nov 2025, 13:18 | 7.9 | 7.9 |
| 3 Oct 2025, 12:20 | 8.37 | 8.37 |
| 1 Sep 2025, 10:08 | 8.21 | 8.21 |
| 8 Aug 2025, 10:47 | 8.21 | 8.21 |
| 15 Jul 2025, 11:57 | 8.27 | 8.27 |
| 20 Jun 2025, 11:43 | 8.07 | 8.07 |
| 9 May 2025, 10:53 | 8.21 | 8.21 |
| 23 Apr 2025, 14:02 | 8.1 | 8.1 |
| 18 Mar 2025, 11:01 | 8.29 | 8.29 |
| 17 Feb 2025, 13:51 | 8.22 | 8.22 |
| 28 Jan 2025, 12:57 | 8.04 | 8.04 |
| 9 Dec 2024, 10:31 | 7.87 | 7.87 |
| 25 Nov 2024, 10:27 | 7.8 | 7.8 |
| 15 Oct 2024, 14:30 | 7.98 | 7.98 |
| 23 Sep 2024, 13:48 | 7.64 | 7.64 |
| 19 Aug 2024, 13:46 | 8.28 | 8.28 |
| 15 Jul 2024, 10:09 | 8.22 | 8.22 |
| 19 Jun 2024, 11:54 | 8.21 | 8.21 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 28 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Apr 2026, 11:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2026, 13:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Feb 2026, 12:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jan 2026, 14:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Dec 2025, 11:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Nov 2025, 13:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Oct 2025, 12:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Sep 2025, 10:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Aug 2025, 10:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2025, 11:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jun 2025, 11:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 May 2025, 10:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Mar 2025, 11:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Feb 2025, 13:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Jan 2025, 12:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2024, 10:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Nov 2024, 10:27 | 0.035 | 0.035 mg/l |
| 15 Oct 2024, 14:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Sep 2024, 13:48 | 0.03 | 0.03 mg/l |
| 19 Aug 2024, 13:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2024, 10:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jun 2024, 11:54 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.98 mg/l
Sampled 28 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:46 | 3.98 | 3.98 mg/l |
| 1 Apr 2026, 11:20 | 6.19 | 6.19 mg/l |
| 6 Mar 2026, 13:40 | 7.19 | 7.19 mg/l |
| 19 Feb 2026, 12:37 | 5.6 | 5.6 mg/l |
| 2 Jan 2026, 14:36 | 7.19 | 7.19 mg/l |
| 12 Dec 2025, 11:50 | 7.39 | 7.39 mg/l |
| 12 Nov 2025, 13:18 | 7.79 | 7.79 mg/l |
| 3 Oct 2025, 12:20 | 2 | 2 mg/l |
| 1 Sep 2025, 10:08 | 1.8 | 1.8 mg/l |
| 8 Aug 2025, 10:47 | 1.8 | 1.8 mg/l |
| 15 Jul 2025, 11:57 | 1.9 | 1.9 mg/l |
| 20 Jun 2025, 11:43 | 2.78 | 2.78 mg/l |
| 9 May 2025, 10:53 | 4.89 | 4.89 mg/l |
| 18 Mar 2025, 11:01 | 6.69 | 6.69 mg/l |
| 17 Feb 2025, 13:51 | 6.09 | 6.09 mg/l |
| 28 Jan 2025, 12:57 | 6.19 | 6.19 mg/l |
| 9 Dec 2024, 10:31 | 6.09 | 6.09 mg/l |
| 25 Nov 2024, 10:27 | 6.19 | 6.19 mg/l |
| 15 Oct 2024, 14:30 | 6 | 6 mg/l |
| 23 Sep 2024, 13:48 | 14 | 14 mg/l |
| 19 Aug 2024, 13:46 | 4.29 | 4.29 mg/l |
| 15 Jul 2024, 10:09 | 4.89 | 4.89 mg/l |
| 19 Jun 2024, 11:54 | 5.69 | 5.69 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.044 mg/l
Sampled 28 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:46 | 0.044 | 0.044 mg/l |
| 1 Apr 2026, 11:20 | 0.025 | 0.025 mg/l |
| 6 Mar 2026, 13:40 | 0.027 | 0.027 mg/l |
| 19 Feb 2026, 12:37 | 0.035 | 0.035 mg/l |
| 2 Jan 2026, 14:36 | 0.025 | 0.025 mg/l |
| 12 Dec 2025, 11:50 | 0.023 | 0.023 mg/l |
| 12 Nov 2025, 13:18 | 0.036 | 0.036 mg/l |
| 3 Oct 2025, 12:20 | 0.024 | 0.024 mg/l |
| 1 Sep 2025, 10:08 | 0.031 | 0.031 mg/l |
| 8 Aug 2025, 10:47 | 0.033 | 0.033 mg/l |
| 15 Jul 2025, 11:57 | 0.037 | 0.037 mg/l |
| 20 Jun 2025, 11:43 | 0.035 | 0.035 mg/l |
| 9 May 2025, 10:53 | 0.019 | 0.019 mg/l |
| 18 Mar 2025, 11:01 | 0.012 | 0.012 mg/l |
| 17 Feb 2025, 13:51 | 0.013 | 0.013 mg/l |
| 28 Jan 2025, 12:57 | 0.026 | 0.026 mg/l |
| 9 Dec 2024, 10:31 | 0.043 | 0.043 mg/l |
| 25 Nov 2024, 10:27 | 0.1 | 0.1 mg/l |
| 15 Oct 2024, 14:30 | 0.019 | 0.019 mg/l |
| 23 Sep 2024, 13:48 | 0.026 | 0.026 mg/l |
| 19 Aug 2024, 13:46 | 0.034 | 0.034 mg/l |
| 15 Jul 2024, 10:09 | 0.024 | 0.024 mg/l |
| 19 Jun 2024, 11:54 | 0.024 | 0.024 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
639 µS/cm
Sampled 28 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 09:46 | 639 | 639 µS/cm |
| 1 Apr 2026, 11:20 | 475 | 475 µS/cm |
| 6 Mar 2026, 13:40 | 386 | 386 µS/cm |
| 19 Feb 2026, 12:37 | 330 | 330 µS/cm |
| 2 Jan 2026, 14:36 | 428 | 428 µS/cm |
| 12 Dec 2025, 11:50 | 380 | 380 µS/cm |
| 12 Nov 2025, 13:18 | 478 | 478 µS/cm |
| 3 Oct 2025, 12:20 | 706 | 706 µS/cm |
| 1 Sep 2025, 10:08 | 728 | 728 µS/cm |
| 8 Aug 2025, 10:47 | 715 | 715 µS/cm |
| 15 Jul 2025, 11:57 | 727 | 727 µS/cm |
| 20 Jun 2025, 11:43 | 703 | 703 µS/cm |
| 9 May 2025, 10:53 | 588 | 588 µS/cm |
| 23 Apr 2025, 14:02 | 411 | 411 µS/cm |
| 18 Mar 2025, 11:01 | 485 | 485 µS/cm |
| 17 Feb 2025, 13:51 | 404 | 404 µS/cm |
| 28 Jan 2025, 12:57 | 312 | 312 µS/cm |
| 9 Dec 2024, 10:31 | 330 | 330 µS/cm |
| 25 Nov 2024, 10:27 | 323 | 323 µS/cm |
| 15 Oct 2024, 14:30 | 415 | 415 µS/cm |
| 23 Sep 2024, 13:48 | 407 | 407 µS/cm |
| 19 Aug 2024, 13:46 | 669 | 669 µS/cm |
| 15 Jul 2024, 10:09 | 588 | 588 µS/cm |
| 19 Jun 2024, 11:54 | 553 | 553 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 24 | Jun 2024 – May 2026 | 91.3% 28 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jun 2024 – May 2026 | 9.22 mg/l 28 May 2026 |
| Temperature of Water 0076 | River water | 24 | Jun 2024 – May 2026 | 14.8 °C 28 May 2026 |
| pH 0061 | River water | 24 | Jun 2024 – May 2026 | 8.33 28 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 23 | Jun 2024 – May 2026 | below 0.03 mg/l 28 May 2026 |
| Nitrate as N 0117 | River water | 23 | Jun 2024 – May 2026 | 3.98 mg/l 28 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 23 | Jun 2024 – May 2026 | 0.044 mg/l 28 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 639 µS/cm 28 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 23 | Jun 2024 – May 2026 | 200 mg/l 28 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 23 | Jun 2024 – May 2026 | below 0.00078 mg/l 28 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 21 | Jun 2024 – May 2026 | 1.1 mg/l 28 May 2026 |
| Cypermethrin 0073 | River water | 11 | Apr 2025 – Mar 2026 | below 0.002 µg/l 6 Mar 2026 |
| Nitrite as N 0118 | River water | 23 | Jun 2024 – May 2026 | 0.018 mg/l 28 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 23 | Jun 2024 – May 2026 | 4 mg/l 28 May 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.