Red Brook 100 m downstream from confluence with Stagg Bk

EA name: RED BK 100M D/S CONFLUENCE WITH STAGG BK (also listed as “RSN0534 RED BROOK 100M D/S FROM CONFLUENCE WITH STAGG BK”)
Environment Agency sampling point NW-RSN0534 · 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
14 Aug 2026, 12:542 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
7 since 16 Jan 2026 Imported periods: 1 Oct 2023 – 27 Oct 2026. Samples outside them are not shown here.
Latest sample
River / running surface water Monitoring (national agency policy) · results completed 2 Oct 2026
Where
National Grid 350937, 342025As published, to the nearest 1 m. Open in a map
River, by its own name
Red Brook
River, by the map
Red BrookPlaced on the river its name gives, 1 m from the line.
Next gauge downstream
Farndon On the Dee · 34 km along the river
Why it was sampled
Monitoring (national agency policy) (7 samples)

Results here were completed a median of 58 days after the sample was taken (49 to 58 days, 2 samples).

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

86.5%

Sampled 14 Aug 2026, 2 months ago · 7 results banked

859095100%20242025202616 Jan 2026, 11:41: 89.6%25 Feb 2026, 11:18: 98%25 Mar 2026, 12:02: 89.1%20 Apr 2026, 14:04: 89.1%27 May 2026, 11:40: 91.2%2 Jul 2026, 14:14: 87.7%14 Aug 2026, 12:54: 86.5%
Every result (7)
SampledResult as publishedReads as
14 Aug 2026, 12:5486.5 86.5%
2 Jul 2026, 14:1487.7 87.7%
27 May 2026, 11:4091.2 91.2%
20 Apr 2026, 14:0489.1 89.1%
25 Mar 2026, 12:0289.1 89.1%
25 Feb 2026, 11:1898 98%
16 Jan 2026, 11:4189.6 89.6%

Dissolved oxygen

as O2 · code 9924 · mg/l

8.13 mg/l

Sampled 14 Aug 2026, 2 months ago · 7 results banked

89101112mg/l20242025202616 Jan 2026, 11:41: 11.2 mg/l25 Feb 2026, 11:18: 11.1 mg/l25 Mar 2026, 12:02: 10.5 mg/l20 Apr 2026, 14:04: 9.72 mg/l27 May 2026, 11:40: 8.67 mg/l2 Jul 2026, 14:14: 8.6 mg/l14 Aug 2026, 12:54: 8.13 mg/l
Every result (7)
SampledResult as publishedReads as
14 Aug 2026, 12:548.13 8.13 mg/l
2 Jul 2026, 14:148.6 8.6 mg/l
27 May 2026, 11:408.67 8.67 mg/l
20 Apr 2026, 14:049.72 9.72 mg/l
25 Mar 2026, 12:0210.5 10.5 mg/l
25 Feb 2026, 11:1811.1 11.1 mg/l
16 Jan 2026, 11:4111.2 11.2 mg/l

Water temperature

code 0076 · °C

18.1 °C

Sampled 14 Aug 2026, 2 months ago · 7 results banked

5101520°C20242025202616 Jan 2026, 11:41: 5.6 °C25 Feb 2026, 11:18: 9.6 °C25 Mar 2026, 12:02: 8.2 °C20 Apr 2026, 14:04: 11.3 °C27 May 2026, 11:40: 17.6 °C2 Jul 2026, 14:14: 16.1 °C14 Aug 2026, 12:54: 18.1 °C
Every result (7)
SampledResult as publishedReads as
14 Aug 2026, 12:5418.1 18.1 °C
2 Jul 2026, 14:1416.1 16.1 °C
27 May 2026, 11:4017.6 17.6 °C
20 Apr 2026, 14:0411.3 11.3 °C
25 Mar 2026, 12:028.2 8.2 °C
25 Feb 2026, 11:189.6 9.6 °C
16 Jan 2026, 11:415.6 5.6 °C

pH

code 0061

7.97

Sampled 14 Aug 2026, 2 months ago · 7 results banked

7.67.77.87.9820242025202616 Jan 2026, 11:41: 7.6525 Feb 2026, 11:18: 7.9525 Mar 2026, 12:02: 7.7820 Apr 2026, 14:04: 7.7327 May 2026, 11:40: 7.942 Jul 2026, 14:14: 7.7714 Aug 2026, 12:54: 7.97
Every result (7)
SampledResult as publishedReads as
14 Aug 2026, 12:547.97 7.97
2 Jul 2026, 14:147.77 7.77
27 May 2026, 11:407.94 7.94
20 Apr 2026, 14:047.73 7.73
25 Mar 2026, 12:027.78 7.78
25 Feb 2026, 11:187.95 7.95
16 Jan 2026, 11:417.65 7.65

Ammonia

ammoniacal nitrogen as N · code 0111 · mg/l

below 0.03 mg/l (not detected above this)

Sampled 14 Aug 2026, 2 months ago · 7 results banked

00.20.40.6mg/l20242025202616 Jan 2026, 11:41: 0.36 mg/l25 Feb 2026, 11:18: 0.2 mg/l25 Mar 2026, 12:02: 0.57 mg/l20 Apr 2026, 14:04: 0.26 mg/l27 May 2026, 11:40: 0.047 mg/l2 Jul 2026, 14:14: 0.05 mg/l14 Aug 2026, 12:54: below 0.03 mg/l (not detected above this)
Every result (7)
SampledResult as publishedReads as
14 Aug 2026, 12:54<0.03 below 0.03 mg/l (not detected above this)
2 Jul 2026, 14:140.05 0.05 mg/l
27 May 2026, 11:400.047 0.047 mg/l
20 Apr 2026, 14:040.26 0.26 mg/l
25 Mar 2026, 12:020.57 0.57 mg/l
25 Feb 2026, 11:180.2 0.2 mg/l
16 Jan 2026, 11:410.36 0.36 mg/l

Nitrate

as nitrogen (N) · code 0117 · mg/l

12 mg/l

Sampled 14 Aug 2026, 2 months ago · 7 results banked

57.51012.515mg/l20242025202616 Jan 2026, 11:41: 8.25 mg/l25 Feb 2026, 11:18: 7.45 mg/l25 Mar 2026, 12:02: 6.22 mg/l20 Apr 2026, 14:04: 10.9 mg/l27 May 2026, 11:40: 11.9 mg/l2 Jul 2026, 14:14: 14.9 mg/l14 Aug 2026, 12:54: 12 mg/l
Every result (7)
SampledResult as publishedReads as
14 Aug 2026, 12:5412 12 mg/l
2 Jul 2026, 14:1414.9 14.9 mg/l
27 May 2026, 11:4011.9 11.9 mg/l
20 Apr 2026, 14:0410.9 10.9 mg/l
25 Mar 2026, 12:026.22 6.22 mg/l
25 Feb 2026, 11:187.45 7.45 mg/l
16 Jan 2026, 11:418.25 8.25 mg/l

Phosphate

orthophosphate, reactive, as P · code 0180 · mg/l

0.12 mg/l

Sampled 14 Aug 2026, 2 months ago · 7 results banked

0.050.10.150.20.25mg/l20242025202616 Jan 2026, 11:41: 0.11 mg/l25 Feb 2026, 11:18: 0.1 mg/l25 Mar 2026, 12:02: 0.096 mg/l20 Apr 2026, 14:04: 0.057 mg/l27 May 2026, 11:40: 0.072 mg/l2 Jul 2026, 14:14: 0.21 mg/l14 Aug 2026, 12:54: 0.12 mg/l
Every result (7)
SampledResult as publishedReads as
14 Aug 2026, 12:540.12 0.12 mg/l
2 Jul 2026, 14:140.21 0.21 mg/l
27 May 2026, 11:400.072 0.072 mg/l
20 Apr 2026, 14:040.057 0.057 mg/l
25 Mar 2026, 12:020.096 0.096 mg/l
25 Feb 2026, 11:180.1 0.1 mg/l
16 Jan 2026, 11:410.11 0.11 mg/l

Conductivity

at 25 °C · code 0077 · µS/cm

1407 µS/cm

Sampled 14 Aug 2026, 2 months ago · 7 results banked

500750100012501500µS/cm20242025202616 Jan 2026, 11:41: 712 µS/cm25 Feb 2026, 11:18: 650 µS/cm25 Mar 2026, 12:02: 574 µS/cm20 Apr 2026, 14:04: 847 µS/cm27 May 2026, 11:40: 940 µS/cm2 Jul 2026, 14:14: 1155 µS/cm14 Aug 2026, 12:54: 1407 µS/cm
Every result (7)
SampledResult as publishedReads as
14 Aug 2026, 12:541407 1407 µS/cm
2 Jul 2026, 14:141155 1155 µS/cm
27 May 2026, 11:40940 940 µS/cm
20 Apr 2026, 14:04847 847 µS/cm
25 Mar 2026, 12:02574 574 µS/cm
25 Feb 2026, 11:18650 650 µS/cm
16 Jan 2026, 11:41712 712 µS/cm

Everything measured here

154 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 154 rows
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 River water 7 Jan 2026 – Aug 2026 86.5% 14 Aug 2026
Oxygen, Dissolved as O2 9924 River water 7 Jan 2026 – Aug 2026 8.13 mg/l 14 Aug 2026
Temperature of Water 0076 River water 7 Jan 2026 – Aug 2026 18.1 °C 14 Aug 2026
pH 0061 River water 7 Jan 2026 – Aug 2026 7.97 14 Aug 2026
Ammoniacal Nitrogen as N 0111 River water 7 Jan 2026 – Aug 2026 below 0.03 mg/l 14 Aug 2026
Nitrate as N 0117 River water 7 Jan 2026 – Aug 2026 12 mg/l 14 Aug 2026
Orthophosphate, reactive as P 0180 River water 7 Jan 2026 – Aug 2026 0.12 mg/l 14 Aug 2026
Conductivity at 25 C 0077 River water 7 Jan 2026 – Aug 2026 1407 µS/cm 14 Aug 2026
(Perfluorohexanesulfonyl)[3-(trimethylazaniumyl)propyl]azanide 2890 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
10:2 Fluorotelomer sulfonic acid 2994 River water 3 May 2026 – Aug 2026 below 0.002 µg/l 14 Aug 2026
11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
2H,2H,3H,3H-Perfluorooctanoic acid 2989 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
2H-Perfluoro-2-decenoic acid 2888 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
3-Perfluoroheptylpropanoic acid 2925 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
3:3 Fluorotelomer carboxylic acid 2926 River water 3 May 2026 – Aug 2026 below 0.004 µg/l 14 Aug 2026
4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
4:2 Fluorotelomer sulfonic acid 2987 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
5:1:2 Fluorotelomer betaine 2887 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
5:3 Fluorotelomer betaine 2886 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
6:2 Fluorotelomer phosphate diester 2986 River water 3 May 2026 – Aug 2026 below 0.004 µg/l 14 Aug 2026
6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
6:2 Fluorotelomer sulfonamide betaine 2985 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
6:2 Fluorotelomer sulfonic acid 2984 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
6:2/8:2 Fluorotelomer phosphate diester 2884 River water 3 May 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
6:6 Perfluorophosphinic acid 2883 River water 3 May 2026 – Aug 2026 below 0.004 µg/l 14 Aug 2026
6:8 Perfluorophosphinic acid 2882 River water 3 May 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
8:2 Fluorotelomer phosphate diester 2880 River water 2 May 2026 – Aug 2026 below 0.004 µg/l 14 Aug 2026
8:2 Fluorotelomer sulfonic acid 2983 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
8:8 Perfluorophosphinic acid 2879 River water 3 May 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Aldicarb 9344 River water 7 Jan 2026 – Aug 2026 below 0.005 µg/l 14 Aug 2026
Aldicarb sulfoxide 8806 River water 7 Jan 2026 – Aug 2026 below 0.005 µg/l 14 Aug 2026
Aldoxycarb :- {Aldicarb Sulfone} 8807 River water 7 Jan 2026 – Aug 2026 below 0.005 µg/l 14 Aug 2026
Alkalinity to pH 4.5 as CaCO3 0162 River water 7 Jan 2026 – Aug 2026 200 mg/l 14 Aug 2026
Aluminium, Dissolved 6037 River water 7 Jan 2026 – Aug 2026 39 µg/l 14 Aug 2026
Aminomethylphosphonic acid 7125 River water 7 Jan 2026 – Aug 2026 0.36 µg/l 14 Aug 2026
Ammonia un-ionised as N 0119 River water 7 Jan 2026 – Aug 2026 below 0.00092 mg/l 14 Aug 2026
Asulam 3004 River water 7 Jan 2026 – Aug 2026 below 0.02 µg/l 14 Aug 2026
Azoxystrobin 5050 River water 7 Jan 2026 – Aug 2026 below 0.02 µg/l 14 Aug 2026
Barium, Dissolved 9446 River water 7 Jan 2026 – Aug 2026 360 µg/l 14 Aug 2026
Benzo(a)Pyrene 6399 River water 5 Jan 2026 – Jul 2026 0.0034 µg/l 2 Jul 2026
Benzo(b)Fluoranthene 0731 River water 6 Jan 2026 – Aug 2026 0.002 µg/l 14 Aug 2026
Benzo(g,h,i)Perylene 0714 River water 5 Jan 2026 – Jul 2026 0.0028 µg/l 2 Jul 2026
Benzo(k)Fluoranthene 0733 River water 5 Jan 2026 – Jul 2026 0.0015 µg/l 2 Jul 2026
Boron, Dissolved 9447 River water 7 Jan 2026 – Aug 2026 120 µg/l 14 Aug 2026
Cadmium, Dissolved 0106 River water 7 Jan 2026 – Aug 2026 0.011 µg/l 14 Aug 2026
Calcium, Dissolved 0239 River water 7 Jan 2026 – Aug 2026 87 mg/l 14 Aug 2026
Carbaryl 9343 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Carbendazim 3475 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Carbetamide 9073 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Carbofuran 3086 River water 7 Jan 2026 – Aug 2026 below 0.005 µg/l 14 Aug 2026
Carbon, Organic, Dissolved as C :- {DOC} 0301 River water 7 Jan 2026 – Aug 2026 5.1 mg/l 14 Aug 2026
Chloridazon 6760 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Chloride 0172 River water 7 Jan 2026 – Aug 2026 240 mg/l 14 Aug 2026
Chlorotoluron 9348 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Chloroxuron 3399 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Chromium, Dissolved 3409 River water 7 Jan 2026 – Aug 2026 below 0.5 µg/l 14 Aug 2026
cis-Permethrin 9341 River water 6 Jan 2026 – Aug 2026 below 0.0001 µg/l 14 Aug 2026
Copper : BLM Bioavailable 4821 River water 7 Jan 2026 – Aug 2026 0.16 µg/l 14 Aug 2026
Copper, Dissolved 6450 River water 7 Jan 2026 – Aug 2026 2.7 µg/l 14 Aug 2026
Cypermethrin 0073 River water 7 Jan 2026 – Aug 2026 below 0.00002 µg/l 14 Aug 2026
Cypermethrin Identification 5446 River water 7 Jan 2026 – Aug 2026 1 text result 14 Aug 2026
Di(2-ethylhexyl) phthalate :- {DEHP} 6724 River water 4 Jan 2026 – Apr 2026 below 0.2 µg/l 20 Apr 2026
Diflurobenzuron 9345 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Diuron 3811 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Ethiofencarb 6955 River water 7 Jan 2026 – Aug 2026 below 0.005 µg/l 14 Aug 2026
Ethirimol 5047 River water 7 Jan 2026 – Aug 2026 below 0.05 µg/l 14 Aug 2026
Fenuron 9339 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Flow Type 2896 River water 7 Jan 2026 – Aug 2026 Moderate Flow 14 Aug 2026
Fluoranthene 0736 River water 5 Jan 2026 – Aug 2026 0.0047 µg/l 14 Aug 2026
GCMS Screen : Target Based multi-residue screening : Semi Quantitative 4994 River water 3 Feb 2026 – Aug 2026 1 text result 14 Aug 2026
Glyphosate 3007 River water 7 Jan 2026 – Aug 2026 below 0.1 µg/l 14 Aug 2026
Hardness, Calcium 0163 River water 7 Jan 2026 – Aug 2026 217 mg/l 14 Aug 2026
Hardness, Total as CaCO3 0158 River water 7 Jan 2026 – Aug 2026 328 mg/l 14 Aug 2026
Hexafluoropropylene oxide dimer acid (Gen X) 2981 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
Hexafluoropropylene oxide trimer acid 2980 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
Indeno(1,2,3-cd)pyrene 0746 River water 5 Jan 2026 – Jul 2026 0.0029 µg/l 2 Jul 2026
Iron, Dissolved 6460 River water 7 Jan 2026 – Aug 2026 190 µg/l 14 Aug 2026
Isoproturon 3117 River water 4 Jan 2026 – Apr 2026 below 0.01 µg/l 20 Apr 2026
LCMS Screen : Semi Quantitative 7299 River water 1 Aug 2026 – Aug 2026 1 text result 14 Aug 2026
Lead : BLM Bioavailable 3377 River water 7 Jan 2026 – Aug 2026 0.01 µg/l 14 Aug 2026
Lead, Dissolved 0052 River water 7 Jan 2026 – Aug 2026 below 0.1 µg/l 14 Aug 2026
Linuron 3118 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Lithium, Dissolved 4201 River water 7 Jan 2026 – Aug 2026 below 100 µg/l 14 Aug 2026
Magnesium, Dissolved 0235 River water 7 Jan 2026 – Aug 2026 27 mg/l 14 Aug 2026
Manganese : BLM Bioavailable 4820 River water 7 Jan 2026 – Aug 2026 9 µg/l 14 Aug 2026
Manganese, Dissolved 6458 River water 7 Jan 2026 – Aug 2026 17 µg/l 14 Aug 2026
Methabenzthiazuron 7053 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Methiocarb 6971 River water 7 Jan 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
Methomyl 6972 River water 7 Jan 2026 – Aug 2026 below 0.005 µg/l 14 Aug 2026
Metoxuron 3130 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Metsulfuron-methyl 9861 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Monolinuron 3925 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Monuron 3400 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
N-Ethylperfluorooctanesulfonamide 2977 River water 3 May 2026 – Aug 2026 below 0.002 µg/l 14 Aug 2026
N-methylperfluorooctanesulfonamide 2975 River water 3 May 2026 – Aug 2026 below 0.002 µg/l 14 Aug 2026
Neburon 9756 River water 7 Jan 2026 – Aug 2026 below 0.01 µg/l 14 Aug 2026
Nickel : BLM Bioavailable 3878 River water 7 Jan 2026 – Aug 2026 1 µg/l 14 Aug 2026
Nickel, Dissolved 3410 River water 7 Jan 2026 – Aug 2026 2.9 µg/l 14 Aug 2026
Nitrite as N 0118 River water 7 Jan 2026 – Aug 2026 0.032 mg/l 14 Aug 2026
Nitrogen, Total as N 9686 River water 7 Jan 2026 – Aug 2026 14 mg/l 14 Aug 2026
Nitrogen, Total Oxidised as N 0116 River water 7 Jan 2026 – Aug 2026 12 mg/l 14 Aug 2026
Oxamyl 6980 River water 7 Jan 2026 – Aug 2026 below 0.005 µg/l 14 Aug 2026
Perfluoro(2-ethoxyethane)sulfonic acid 2924 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluoro(4-methoxybutanoic) acid 2923 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluoro-3,6-dioxaheptanoic acid 2922 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluoro-3-methoxypropanoic acid 2921 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluoro-4-ethylcyclohexanesulfonic acid 2973 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluorobutanesulfonic acid 2972 River water 2 May 2026 – Jul 2026 0.0025 µg/l 2 Jul 2026
Perfluorobutanoic acid 2995 River water 2 May 2026 – Jul 2026 0.0035 µg/l 2 Jul 2026
Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 River water 3 May 2026 – Aug 2026 0.00075 µg/l 14 Aug 2026
Perfluorodecanesulfonic acid 2969 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
Perfluorodecanoic acid 8892 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
Perfluorododecane sulfonic acid 2968 River water 3 May 2026 – Aug 2026 below 0.005 µg/l 14 Aug 2026
Perfluorododecanoic acid 8894 River water 3 May 2026 – Aug 2026 below 0.002 µg/l 14 Aug 2026
Perfluoroheptanesulfonic acid 2967 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluoroheptanoic acid 8889 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
Perfluorohexane sulfonamido amine 2874 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluorohexanesulfonamide 2965 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluorohexanesulfonic acid (B) 2944 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluorohexanesulfonic acid (L) 2964 River water 3 May 2026 – Aug 2026 0.00086 µg/l 14 Aug 2026
Perfluorohexanoic acid 8888 River water 2 May 2026 – Jul 2026 0.0017 µg/l 2 Jul 2026
Perfluorononanesulfonic acid 2963 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluorononanoic acid 8891 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
Perfluorooctadecanoic acid 2962 River water 3 May 2026 – Aug 2026 below 0.002 µg/l 14 Aug 2026
Perfluorooctanesulfonamide 2961 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
Perfluorooctanesulfonic acid (branched) 2960 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluorooctanesulfonic acid (linear) 2959 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluorooctanesulfonic acid (total) 2958 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
Perfluorooctanoate anion 9274 River water 7 Jan 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
Perfluorooctanoic acid 8890 River water 2 May 2026 – Jul 2026 0.0013 µg/l 2 Jul 2026
Perfluorooctylsulphonate anion 9276 River water 7 Jan 2026 – Aug 2026 0.00094 µg/l 14 Aug 2026
Perfluoropentanesulfonic acid 2957 River water 3 May 2026 – Aug 2026 below 0.0005 µg/l 14 Aug 2026
Perfluoropentanoic acid 8887 River water 2 May 2026 – Jul 2026 0.0025 µg/l 2 Jul 2026
Perfluorotetradecanoic acid 8895 River water 3 May 2026 – Aug 2026 below 0.006 µg/l 14 Aug 2026
Perfluorotridecanoic acid 2955 River water 3 May 2026 – Aug 2026 below 0.002 µg/l 14 Aug 2026
Perfluoroundecane sulfonic acid 2953 River water 3 May 2026 – Aug 2026 below 0.004 µg/l 14 Aug 2026
Perfluoroundecanoic acid 8893 River water 3 May 2026 – Aug 2026 below 0.001 µg/l 14 Aug 2026
Phosphorus, Total as P 0348 River water 7 Jan 2026 – Aug 2026 0.13 mg/l 14 Aug 2026
Potassium, Dissolved 0209 River water 7 Jan 2026 – Aug 2026 30 mg/l 14 Aug 2026
Propoxur 6987 River water 7 Jan 2026 – Aug 2026 below 0.005 µg/l 14 Aug 2026
Silica, reactive as SiO2 0182 River water 7 Jan 2026 – Aug 2026 11 mg/l 14 Aug 2026
Sodium, Dissolved 0205 River water 7 Jan 2026 – Aug 2026 150 mg/l 14 Aug 2026
Solids, Suspended at 105 C 0135 River water 7 Jan 2026 – Aug 2026 6.6 mg/l 14 Aug 2026
Strontium, Filtered 6693 River water 7 Jan 2026 – Aug 2026 360 µg/l 14 Aug 2026
Sulcotrione 5042 River water 7 Jan 2026 – Aug 2026 below 0.1 µg/l 14 Aug 2026
Sulphate, Dissolved as SO4 7859 River water 7 Jan 2026 – Aug 2026 88 mg/l 14 Aug 2026
trans-Permethrin 9342 River water 7 Jan 2026 – Aug 2026 below 0.0001 µg/l 14 Aug 2026
Zinc : BLM Bioavailable 4822 River water 7 Jan 2026 – Aug 2026 4.1 µg/l 14 Aug 2026
Zinc, Dissolved 3408 River water 7 Jan 2026 – Aug 2026 11 µg/l 14 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.