Riddy Brook Footbridge near Weir from Cam
EA name: RIDDY BK.FT.BR.NEAR WEIR FROM CAM
Environment Agency sampling point AN-29M08 · 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 Jul 2026, 10:453 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 15 since 12 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 543430, 252380As published, to the nearest 10 m. Open in a map
- River, by its own name
- Riddy Brook
- River, by the map
- Riddy BrookPlaced on the river its name gives, 8 m from the line.
- Next gauge downstream
- Cambridge Jesus Lock On the River Cam · 9.3 km along the river (the path rests on a repair to the map)
- Why it was sampled
- Planned investigation (local monitoring) (15 samples)
Everything measured here
29 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 29 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| 1,1,1-Trichloroethane 3268 | River water | 11 | Oct 2023 – Jul 2026 | below 0.1 µg/l 14 Jul 2026 |
| 1,2-Dichloroethane 3272 | River water | 11 | Oct 2023 – Jul 2026 | below 0.1 µg/l 14 Jul 2026 |
| 1,2-Dimethylbenzene :- {o-Xylene} 9845 | River water | 11 | Oct 2023 – Jul 2026 | below 0.1 µg/l 14 Jul 2026 |
| 2,3,6-TBA :- {2,3,6-Trichlorobenzoic acid} 7726 | River water | 15 | Oct 2023 – Jul 2026 | 0.05 µg/l 14 Jul 2026 |
| 2,4-DB :- {4-(2,4-dichlorophenoxy)butyric acid} 3791 | River water | 15 | Oct 2023 – Jul 2026 | below 0.005 µg/l 14 Jul 2026 |
| Atrazine 3002 | River water | 15 | Oct 2023 – Jul 2026 | 0.0058 µg/l 14 Jul 2026 |
| Benazolin 3792 | River water | 15 | Oct 2023 – Jul 2026 | below 0.005 µg/l 14 Jul 2026 |
| Carbon tetrachloride :- {Tetrachloromethane} 1049 | River water | 11 | Oct 2023 – Jul 2026 | below 0.1 µg/l 14 Jul 2026 |
| Chloroform :- {Trichloromethane} 3373 | River water | 11 | Oct 2023 – Jul 2026 | below 0.1 µg/l 14 Jul 2026 |
| cis-1,2-Dichloroethylene :- {cis-1,2-Dichloroethene} 6538 | River water | 12 | Oct 2023 – Jul 2026 | below 0.5 µg/l 14 Jul 2026 |
| Desmetryn 6635 | River water | 15 | Oct 2023 – Jul 2026 | below 0.005 µg/l 14 Jul 2026 |
| Dicamba 3550 | River water | 15 | Oct 2023 – Jul 2026 | below 0.01 µg/l 14 Jul 2026 |
| Dimethylbenzene : Sum of (1,2- 1,3- 1,4-) :- {Xylene} 8383 | River water | 11 | Oct 2023 – Jul 2026 | below 0.3 µg/l 14 Jul 2026 |
| Dimethylbenzene : Sum of isomers (1,3- 1,4-) 6716 | River water | 11 | Oct 2023 – Jul 2026 | below 0.2 µg/l 14 Jul 2026 |
| Ethofumesate 7154 | River water | 15 | Oct 2023 – Jul 2026 | below 0.005 µg/l 14 Jul 2026 |
| HEMPA :- {Hexamethylphosphoramide} 7180 | River water | 15 | Oct 2023 – Jul 2026 | 0.02 µg/l 14 Jul 2026 |
| MCPA :- {4-Chloro-2-methylphenoxyacetic acid} 3548 | River water | 15 | Oct 2023 – Jul 2026 | below 0.005 µg/l 14 Jul 2026 |
| Mecoprop 3549 | River water | 15 | Oct 2023 – Jul 2026 | below 0.005 µg/l 14 Jul 2026 |
| Phenol 9522 | River water | 14 | Oct 2023 – Jul 2026 | 0.26 µg/l 14 Jul 2026 |
| Prometryn 5563 | River water | 15 | Oct 2023 – Jul 2026 | below 0.005 µg/l 14 Jul 2026 |
| Propazine 9634 | River water | 15 | Oct 2023 – Jul 2026 | below 0.002 µg/l 14 Jul 2026 |
| Schradan :- {Pestox} 7191 | River water | 15 | Oct 2023 – Jul 2026 | 0.03 µg/l 14 Jul 2026 |
| Simazine 3001 | River water | 15 | Oct 2023 – Jul 2026 | 0.0031 µg/l 14 Jul 2026 |
| Simazine, Atrazine and Trietazine : Sum of 5037 | River water | 15 | Oct 2023 – Jul 2026 | 0.0089 µg/l 14 Jul 2026 |
| Terbutryn 3009 | River water | 15 | Oct 2023 – Jul 2026 | below 0.004 µg/l 14 Jul 2026 |
| Tetrachloroethylene :- {Perchloroethylene} 3328 | River water | 10 | Nov 2023 – Jul 2026 | 0.41 µg/l 14 Jul 2026 |
| Toluene :- {Methylbenzene} 3784 | River water | 11 | Oct 2023 – Jul 2026 | below 0.1 µg/l 14 Jul 2026 |
| Trichloroethylene :- {Trichloroethene} 3334 | River water | 11 | Oct 2023 – Jul 2026 | below 0.1 µg/l 14 Jul 2026 |
| Trietazine 9911 | River water | 15 | Oct 2023 – Jul 2026 | below 0.002 µg/l 14 Jul 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.