Catlow Brook at Catlow Bottoms
EA name: CATLOW BROOK AT CATLOW BOTTOMS (also listed as “RSN1848 CATLOW BROOK AT CATLOW BOTTOMS”)
Environment Agency sampling point NW-RSN1848 · 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
- 2 Jul 2024, 10:012.2 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 30 Sep 2026 and had nothing newer.
- Samples banked
- 4 since 2 Oct 2023 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 388399, 436284As published, to the nearest 1 m. Open in a map
- River, by its own name
- Catlow Brook
- River, by the map
- Catlow BrookPlaced on the river its name gives, 3 m from the line.
- Next gauge downstream
- Lomeshaye On the Pendle Water · 6.2 km along the river
- Why it was sampled
- Monitoring (national agency policy) (4 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
101%
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 10:11 | 101 | 101% |
| 14 Nov 2023, 10:38 | 101.4 | 101.4% |
| 2 Oct 2023, 12:00 | 95.3 | 95.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
13.2 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, 10:11 | 13.2 | 13.2 mg/l |
| 14 Nov 2023, 10:38 | 11.7 | 11.7 mg/l |
| 2 Oct 2023, 12:00 | 9.97 | 9.97 mg/l |
Water temperature
code 0076 · °C
3.9 °C
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 10:11 | 3.9 | 3.9 °C |
| 14 Nov 2023, 10:38 | 9 | 9 °C |
| 2 Oct 2023, 12:00 | 13.2 | 13.2 °C |
pH
code 0061
8.12
Sampled 4 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Dec 2023, 10:11 | 8.12 | 8.12 |
| 14 Nov 2023, 10:38 | 7.99 | 7.99 |
| 2 Oct 2023, 12:00 | 8.14 | 8.14 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.031 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, 10:11 | 0.031 | 0.031 mg/l |
| 14 Nov 2023, 10:38 | 0.02 | 0.02 mg/l |
| 2 Oct 2023, 12:00 | 0.0048 | 0.0048 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.496 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, 10:11 | 0.496 | 0.496 mg/l |
| 14 Nov 2023, 10:38 | 0.516 | 0.516 mg/l |
| 2 Oct 2023, 12:00 | 0.318 | 0.318 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.019 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, 10:11 | 0.019 | 0.019 mg/l |
| 14 Nov 2023, 10:38 | 0.051 | 0.051 mg/l |
| 2 Oct 2023, 12:00 | 0.031 | 0.031 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
502 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, 10:11 | 502 | 502 µS/cm |
| 14 Nov 2023, 10:38 | 171 | 171 µS/cm |
| 2 Oct 2023, 12:00 | 254 | 254 µS/cm |
Everything measured here
61 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 61 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 3 | Oct 2023 – Dec 2023 | 101% 4 Dec 2023 |
| Oxygen, Dissolved as O2 9924 | River water | 3 | Oct 2023 – Dec 2023 | 13.2 mg/l 4 Dec 2023 |
| Temperature of Water 0076 | River water | 3 | Oct 2023 – Dec 2023 | 3.9 °C 4 Dec 2023 |
| pH 0061 | River water | 3 | Oct 2023 – Dec 2023 | 8.12 4 Dec 2023 |
| Ammoniacal Nitrogen as N 0111 | River water | 3 | Oct 2023 – Dec 2023 | 0.031 mg/l 4 Dec 2023 |
| Nitrate as N 0117 | River water | 3 | Oct 2023 – Dec 2023 | 0.496 mg/l 4 Dec 2023 |
| Orthophosphate, reactive as P 0180 | River water | 3 | Oct 2023 – Dec 2023 | 0.019 mg/l 4 Dec 2023 |
| Conductivity at 25 C 0077 | River water | 3 | Oct 2023 – Dec 2023 | 502 µS/cm 4 Dec 2023 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 2 Jul 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Jul 2024 – Jul 2024 | below 0.004 µg/l 2 Jul 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Jul 2024 – Jul 2024 | below 0.005 µg/l 2 Jul 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 3 | Oct 2023 – Dec 2023 | 99 mg/l 4 Dec 2023 |
| Ammonia un-ionised as N 0119 | River water | 3 | Oct 2023 – Dec 2023 | 0.00036 mg/l 4 Dec 2023 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 3 | Oct 2023 – Dec 2023 | 6.9 mg/l 4 Dec 2023 |
| Chloride 0172 | River water | 3 | Oct 2023 – Dec 2023 | 70 mg/l 4 Dec 2023 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 2 Jul 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 2 Jul 2024 |
| Nitrite as N 0118 | River water | 3 | Oct 2023 – Dec 2023 | 0.0041 mg/l 4 Dec 2023 |
| Nitrogen, Total Oxidised as N 0116 | River water | 3 | Oct 2023 – Dec 2023 | 0.5 mg/l 4 Dec 2023 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 2 Jul 2024 |
| Perfluorodecanoic acid 8892 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 2 Jul 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Jul 2024 – Jul 2024 | below 0.005 µg/l 2 Jul 2024 |
| Perfluorododecanoic acid 8894 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 2 Jul 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Jul 2024 – Jul 2024 | below 0.0005 µg/l 2 Jul 2024 |
| Perfluoropentanoic acid 8887 | River water | 1 | Jul 2024 – Jul 2024 | below 0.001 µg/l 2 Jul 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Jul 2024 – Jul 2024 | below 0.006 µg/l 2 Jul 2024 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Jul 2024 – Jul 2024 | below 0.005 µg/l 2 Jul 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Jul 2024 – Jul 2024 | below 0.004 µg/l 2 Jul 2024 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Jul 2024 – Jul 2024 | below 0.002 µg/l 2 Jul 2024 |
| Phosphorus, Total as P 0348 | River water | 3 | Oct 2023 – Dec 2023 | 0.05 mg/l 4 Dec 2023 |
| Silica, reactive as SiO2 0182 | River water | 3 | Oct 2023 – Dec 2023 | 5.7 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.