sampling point
G.U.C. Above Lock 74, Hunton Bridge
| Description | G.U.C. ABOVE LOCK 74, HUNTON BRIDGE |
|---|---|
| Sampling point ID | TH-PCNR0209 |
| Type | Freshwater – Rivers |
| Status | closed |
| Location |
easting northing: 508530 199230 lat lon: 51.68135, -0.431609 |
| Area | Hertfordshire And North London |
| Sub-Area | L&W Herts & North London |
| Summary | 129 samples taken between 2010 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.
31 determinands have been measured at this site
- Action taken
- Alky pH 4.5
- Ammonia(N)
- BOD ATU
- CHLOR A
- CHLOROPHYLL
- 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 129 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).
Samples from 13 Nov 2009 to 24 Aug 2010
| Notation | Determinand | Units | 13 Nov 2009 11:50 | 9 Dec 2009 11:50 | 5 Jan 2010 11:35 | 10 Feb 2010 11:20 | 4 Mar 2010 11:35 | 9 Apr 2010 11:00 | 12 May 2010 11:25 | 7 Jun 2010 11:15 | 6 Jul 2010 11:55 | 24 Aug 2010 12:45 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0061 | pH | 8.2 | 7.71 | 8.14 | 8.26 | 7.71 | 7.73 | |||||
| 0076 | Temperature of Water | °C | 9.35 | 8.54 | 2.13 | 4.24 | 5.96 | 10.74 | ||||
| 0077 | Conductivity at 25 C | μs/cm | 556 | 531 | 661 | 633 | 613 | 620 | ||||
| 0111 | Ammoniacal Nitrogen as N | mg/l | < 0.03 | 0.033 | 0.034 | < 0.03 | < 0.03 | < 0.03 | ||||
| 0116 | Nitrogen, Total Oxidised as N | mg/l | 4.31 | 4.2 | 5.38 | 5.32 | 5.17 | 4.85 | ||||
| 0117 | Nitrate as N | mg/l | 4.29 | 4.18 | 5.36 | 5.3 | 5.15 | 4.83 | ||||
| 0118 | Nitrite as N | mg/l | 0.0208 | 0.0193 | 0.0245 | 0.0181 | 0.0192 | 0.0156 | ||||
| 0119 | Ammonia un-ionised as N | mg/l | < 0.00052 | 0.00028 | 0.00035 | < 0.00036 | < 0.00021 | < 0.00031 | ||||
| 0135 | Solids, Suspended at 105 C | mg/l | 9.7 | 7.3 | 12.1 | 3.1 | 4.4 | 7.6 | ||||
| 0162 | Alkalinity to pH 4.5 as CaCO3 | mg/l | 219 | 225 | 247 | 252 | 235 | 256 | ||||
| 0180 | Orthophosphate, reactive as P | mg/l | 0.106 | 0.11 | 0.1 | 0.094 | 0.104 | 0.141 | ||||
| 0664 | Visible oil or grease, significant trace: Present/Not found (1/0) | pres/nf | 0 | 0 | 0 | 0 | 0 | 0 | ||||
| 6450 | Copper, Dissolved | μg/l | 2.2 | 2 | 1.9 | 1.59 | 1.74 | 1.7 | ||||
| 6455 | Zinc | μg/l | 16.1 | 10.5 | 12 | 7.9 | 7.7 | 9.34 | ||||
| 6841 | Phenolic Odour | pres/nf | 0 | 0 | 0 | 0 | 0 | 0 | ||||
| 7887 | Chlorophyll : Acetone Extract | μg/l | 26.3 | 12.8 | 17.3 | 12.4 | 15.1 | 21.4 | 46.1 | 31.2 | 30.2 | 74.9 |
| 9901 | Oxygen, Dissolved, % Saturation | % | 87.3 | 74.2 | 96.3 | 104.2 | 107.1 | 111.6 | ||||
| 9924 | Oxygen, Dissolved as O2 | mg/l | 9.99 | 8.66 | 13.2 | 13.6 | 13.3 | 12.4 |