sampling point
Ching Brook Above Lee
| Description | CHING BROOK ABOVE LEE |
|---|---|
| Sampling point ID | TH-PLER0015 |
| Type | Freshwater – Unspecified |
| Status | open |
| Location |
easting northing: 536449 191685 lat lon: 51.607469, -0.030958 |
| Area | Hertfordshire And North London |
| Sub-Area | L&W Herts & North London |
| Summary | 133 samples taken between 2024 and 2011 |
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.
12 determinands have been measured at this site
- Alky pH 4.5
- Ammonia(N)
- Cond @ 25C
- N Oxidised
- NH3 un-ion
- Nitrate-N
- Nitrite-N
- O Diss %sat
- Orthophospht
- Oxygen Diss
- Temp Water
- pH
Sampling results
Displaying the twenty most recent samples. You can see all 133 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).
Samples from 6 Jul 2023 to 12 Jun 2024
| Notation | Determinand | Units | 6 Jul 2023 13:17 | 1 Aug 2023 12:48 | 4 Sep 2023 10:22 | 3 Oct 2023 12:07 | 16 Nov 2023 12:30 | 8 Dec 2023 09:32 | 8 Jan 2024 11:28 | 1 Feb 2024 12:23 | 6 Mar 2024 09:36 | 12 Jun 2024 10:10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0061 | pH | 7.79 | 7.71 | 7.86 | 7.85 | 7.86 | 7.89 | 8.02 | 7.92 | 8.06 | 7.67 | |
| 0076 | Temperature of Water | °C | 16.9 | 17.9 | 17.6 | 16.2 | 9.8 | 7.6 | 5.8 | 8 | 7.6 | 13.6 |
| 0077 | Conductivity at 25 C | μs/cm | 812 | 784 | 837 | 826 | 673 | 339 | 564 | 865 | 619 | 876 |
| 0111 | Ammoniacal Nitrogen as N | mg/l | 1.8 | 2.7 | 0.68 | 2.1 | 0.22 | 0.15 | 0.23 | 0.18 | 1.5 | |
| 0116 | Nitrogen, Total Oxidised as N | mg/l | 3.4 | 3.3 | 2.8 | 2.9 | 2.7 | 2.5 | 3 | 3.7 | 2 | 4.2 |
| 0117 | Nitrate as N | mg/l | 3.24 | 3.06 | 2.7 | 2.73 | 2.66 | 2.46 | 2.97 | 3.55 | 1.97 | 3.94 |
| 0118 | Nitrite as N | mg/l | 0.16 | 0.24 | 0.099 | 0.17 | 0.044 | 0.039 | 0.026 | 0.15 | 0.032 | 0.26 |
| 0119 | Ammonia un-ionised as N | mg/l | 0.0339 | 0.0456 | 0.0158 | 0.043 | 0.00288 | 0.00179 | 0.00308 | 0.00275 | 0.0169 | |
| 0162 | Alkalinity to pH 4.5 as CaCO3 | mg/l | 190 | 200 | 210 | 210 | 150 | 150 | 120 | 200 | 140 | 210 |
| 0180 | Orthophosphate, reactive as P | mg/l | 0.67 | 0.98 | 0.91 | 0.87 | 0.26 | 0.25 | 0.23 | 0.54 | 0.22 | 0.82 |
| 9901 | Oxygen, Dissolved, % Saturation | % | 47.5 | 54.3 | 67.6 | 57.3 | 89.5 | 90.6 | 95 | 73.2 | 93.2 | 57.4 |
| 9924 | Oxygen, Dissolved as O2 | mg/l | 4.59 | 5.14 | 6.44 | 5.62 | 10.1 | 10.8 | 11.9 | 8.66 | 11.1 | 5.95 |
Samples from 27 Oct 2022 to 1 Jun 2023
| Notation | Determinand | Units | 27 Oct 2022 12:19 | 15 Nov 2022 11:58 | 18 Nov 2022 12:33 | 7 Dec 2022 12:49 | 31 Jan 2023 13:19 | 24 Feb 2023 12:24 | 6 Mar 2023 13:38 | 21 Apr 2023 10:07 | 22 May 2023 09:36 | 1 Jun 2023 10:30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0061 | pH | 7.81 | 7.92 | 8 | 7.83 | 7.92 | 7.91 | 7.96 | 7.84 | 7.79 | 7.75 | |
| 0076 | Temperature of Water | °C | 15.5 | 13.3 | 11.4 | 9.5 | 8.8 | 8.1 | 8.7 | 9.8 | 12.9 | 13.3 |
| 0077 | Conductivity at 25 C | μs/cm | 941 | 503 | 603 | 928 | 925 | 1040 | 968 | 776 | 928 | 925 |
| 0111 | Ammoniacal Nitrogen as N | mg/l | 0.72 | 0.53 | 0.17 | 1.2 | 0.9 | 0.93 | 1.3 | 0.43 | 0.98 | 2 |
| 0116 | Nitrogen, Total Oxidised as N | mg/l | 3.4 | 2 | 2.9 | 3.4 | 3.3 | 5.4 | 6 | 3.1 | 3.9 | 3.4 |
| 0117 | Nitrate as N | mg/l | 3.27 | 1.91 | 2.86 | 3.27 | 3.22 | 5.26 | 5.86 | 3.02 | 3.74 | 3.08 |
| 0118 | Nitrite as N | mg/l | 0.13 | 0.089 | 0.041 | 0.13 | 0.083 | 0.14 | 0.14 | 0.081 | 0.16 | 0.32 |
| 0119 | Ammonia un-ionised as N | mg/l | 0.0128 | 0.0103 | 0.00344 | 0.0143 | 0.0125 | 0.012 | 0.0197 | 0.00538 | 0.0137 | 0.0264 |
| 0162 | Alkalinity to pH 4.5 as CaCO3 | mg/l | 200 | 98 | 120 | 210 | 160 | 220 | 240 | 170 | 230 | 250 |
| 0180 | Orthophosphate, reactive as P | mg/l | 0.47 | 0.23 | 0.22 | 0.52 | 0.39 | 0.66 | 0.88 | 0.48 | 0.86 | 1 |
| 9901 | Oxygen, Dissolved, % Saturation | % | 65.4 | 80.2 | 88.4 | 77.1 | 83.9 | 78 | 79.6 | 79.6 | 59.5 | 33.5 |
| 9924 | Oxygen, Dissolved as O2 | mg/l | 6.51 | 8.37 | 9.64 | 8.79 | 9.73 | 9.2 | 9.25 | 9.01 | 6.27 | 3.5 |