sampling point
Roding At London Rd Bridge
| Description | RODING AT LONDON RD BRIDGE |
|---|---|
| Sampling point ID | TH-PRGR0030 |
| Type | Freshwater – Rivers |
| Status | open |
| Location |
easting northing: 543742 184054 lat lon: 51.537088, 0.071167 |
| Area | Hertfordshire And North London |
| Sub-Area | L&W Herts & North London |
| Summary | 232 samples taken between 2020 and 2000 |
Determinands
Determinands identify a property which can be measured on a sample or the sampling environment, together with the units in which the result of that measurement will be expressed.
33 determinands have been measured at this site
- Action taken
- Alky pH 4.5
- Ammonia(N)
- B-[a]-pyrene
- B-[b]-fluora
- B-[ghi]-pery
- B-[k]-fluora
- BOD ATU
- C - Org Filt
- Ca Filtered
- Chloride Ion
- Cond @ 20C
- Cond @ 25C
- Fe- Filt
- Fluoranthene
- Ind123pyrene
- Mg Filtered
- Mn BLM Bio
- Mn- Filtered
- N Oxidised
- NH3 un-ion
- Nitrate-N
- Nitrite-N
- O Diss %sat
- Orthophospht
- Oxygen Diss
- SI-GQA
- Sld Sus@105C
- Temp Water
- Triclosan
- TurbidityNTU
- Type of Flow
- pH
Sampling results
Displaying the twenty most recent samples. You can see all 232 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).
Samples from 4 Apr 2019 to 6 Mar 2020
Samples from 14 Dec 2017 to 18 Feb 2019
| Notation | Determinand | Units | 14 Dec 2017 14:19 | 19 Jan 2018 12:46 | 9 Feb 2018 11:39 | 13 Apr 2018 13:37 | 9 May 2018 13:39 | 5 Jul 2018 13:01 | 14 Aug 2018 13:16 | 16 Oct 2018 14:04 | 9 Nov 2018 12:50 | 18 Feb 2019 14:47 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0061 | pH | 7.76 | 7.9 | 7.94 | 7.94 | 7.93 | 8.08 | 7.71 | 7.53 | 7.78 | 7.81 | |
| 0076 | Temperature of Water | °C | 4.7 | 4.7 | 9.3 | 22.1 | 15.1 | |||||
| 0077 | Conductivity at 25 C | μs/cm | 790 | 915 | 831 | 1258 | 571 | |||||
| 0111 | Ammoniacal Nitrogen as N | mg/l | 0.2 | 0.334 | 0.133 | 0.096 | 0.149 | |||||
| 0116 | Nitrogen, Total Oxidised as N | mg/l | 16 | 10.3 | 9.29 | 4.22 | 3.27 | |||||
| 0117 | Nitrate as N | mg/l | 15.9 | 10.2 | 9.24 | 3.59 | 3.16 | |||||
| 0118 | Nitrite as N | mg/l | 0.0575 | 0.0723 | 0.0492 | 0.628 | 0.107 | |||||
| 0119 | Ammonia un-ionised as N | mg/l | 0.00143 | 0.00329 | 0.00201 | 0.00421 | 0.00136 | |||||
| 0162 | Alkalinity to pH 4.5 as CaCO3 | mg/l | 131 | 226 | 243 | 254 | 82 | |||||
| 0180 | Orthophosphate, reactive as P | mg/l | 0.192 | 0.301 | 0.171 | 0.766 | 0.611 | |||||
| 0235 | Magnesium, Dissolved | mg/l | 9.87 | 1.61 | 14.9 | 14 | 15.9 | |||||
| 0239 | Calcium, Dissolved | mg/l | 98.4 | 88.7 | 82.9 | 96.8 | 124 | |||||
| 0301 | Carbon, Organic, Dissolved as C :- {DOC} | mg/l | 5.51 | 6.13 | 6.8 | 5.43 | 6.44 | |||||
| 6460 | Iron, Dissolved | μg/l | < 30 | < 30 | 123 | 62.8 | 55.8 | |||||
| 9901 | Oxygen, Dissolved, % Saturation | % | 100.4 | 81.1 | 86.7 | 94.5 | 49.4 | |||||
| 9924 | Oxygen, Dissolved as O2 | mg/l | 12.9 | 10.4 | 9.93 | 8.23 | 4.96 |