sampling point
Lee At Hertford Castle
| Description | LEE AT HERTFORD CASTLE |
|---|---|
| Sampling point ID | TH-PLER0063 |
| Type | Freshwater – Rivers |
| Status | open |
| Location |
easting northing: 532399 212453 lat lon: 51.795058, -0.081529 |
| Area | Hertfordshire And North London |
| Sub-Area | L&W Herts & North London |
| Summary | 192 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.
30 determinands have been measured at this site
- Action taken
- Alky pH 4.5
- Ammonia(N)
- AmoniaTotYSI
- BOD ATU
- Calcium - Ca
- Chloride Ion
- Cond @ 20C
- Cond @ 25C
- Copper - Cu
- Cu Filtered
- Hardness
- Magnesium-Mg
- N Oxidised
- NH3 un-ion
- Nitrate-N
- Nitrite-N
- O Diss %sat
- Oil & Grs Vs
- Orthophospht
- Oxygen Diss
- Phenol Odour
- SI-EC-F
- SI-GQA
- Sld Sus@105C
- Temp Water
- Type of Flow
- Zinc - as Zn
- pH
- pH in-situ
Sampling results
Displaying the twenty most recent samples. You can see all 192 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).
Samples from 1 Jul 2019 to 3 Mar 2020
| Notation | Determinand | Units | 1 Jul 2019 13:54 | 6 Aug 2019 14:19 | 4 Sep 2019 15:35 | 2 Oct 2019 10:24 | 4 Nov 2019 09:11 | 4 Dec 2019 13:56 | 8 Jan 2020 10:22 | 28 Jan 2020 13:13 | 3 Feb 2020 11:07 | 3 Mar 2020 13:51 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0061 | pH | 7.75 | 7.91 | 7.93 | 7.69 | 7.77 | 7.89 | 7.88 | 7.92 | 7.92 | ||
| 0076 | Temperature of Water | °C | 17.5 | 18 | 16.3 | 12.7 | 9.8 | 5.9 | 9.5 | 8.4 | 7.4 | |
| 0077 | Conductivity at 25 C | μs/cm | 819 | 823 | 824 | 669 | 835 | 518 | 821 | 858 | 778 | |
| 0111 | Ammoniacal Nitrogen as N | mg/l | 0.14 | < 0.03 | < 0.03 | < 0.03 | < 0.03 | 0.043 | 0.041 | 0.047 | 0.042 | |
| 0116 | Nitrogen, Total Oxidised as N | mg/l | 8.7 | 9.4 | 9.2 | 10 | 12.5 | 11 | 12 | 11 | 11 | 8.2 |
| 0117 | Nitrate as N | mg/l | 8.68 | 9.39 | 9.18 | 9.97 | 12.5 | 11 | 11.9 | 10.9 | 8.17 | |
| 0118 | Nitrite as N | mg/l | 0.02 | 0.015 | 0.02 | 0.029 | 0.0211 | 0.043 | 0.057 | 0.055 | 0.052 | 0.027 |
| 0119 | Ammonia un-ionised as N | mg/l | 0.00251 | < 0.0008 | < 0.00074 | < 0.00033 | < 0.00032 | 0.00045 | 0.00055 | 0.00064 | 0.00053 | |
| 0162 | Alkalinity to pH 4.5 as CaCO3 | mg/l | 240 | 230 | 230 | 170 | 213 | 230 | 240 | 220 | 210 | |
| 0180 | Orthophosphate, reactive as P | mg/l | 0.17 | 0.16 | 0.13 | 0.2 | 0.224 | 0.19 | 0.19 | 0.21 | 0.11 | |
| 9901 | Oxygen, Dissolved, % Saturation | % | 95.9 | 85.9 | 93.4 | 82.6 | 87.4 | 93.6 | 90.3 | 99.3 | 98 | |
| 9924 | Oxygen, Dissolved as O2 | mg/l | 9.15 | 8.11 | 9.14 | 8.74 | 9.89 | 11.7 | 10.3 | 11.6 | 11.8 |