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sampling point
Colne Above G.U.C., Maple Lodge

Description COLNE ABOVE G.U.C., MAPLE LODGE
Sampling point ID TH-PCNR0246
Type Freshwater – Rivers
Status open
Location easting northing: 504220 192250
lat lon: 51.619428, -0.496003
Area Hertfordshire And North London
Sub-Area L&W Herts & North London
Summary 265 samples taken between 2024 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.

59 determinands have been measured at this site
  • Action taken
  • Al- Filtered
  • Alky pH 4.5
  • Aluminium-Al
  • Ammonia(N)
  • Arsenic - As
  • As-Filtered
  • BOD ATU
  • Boron - as B
  • CHLOR A
  • CHLOROPHYLL
  • Cadmium - Cd
  • Calcium - Ca
  • Chloride Ion
  • Chromium -Cr
  • Cond @ 20C
  • Cond @ 25C
  • Copper - Cu
  • Cr- Filtered
  • Cu Filtered
  • Fe- Filt
  • Hardness
  • Iron - as Fe
  • Lead - as Pb
  • Magnesium-Mg
  • N Oxidised
  • NH3 un-ion
  • Ni- Filtered
  • Nickel - Ni
  • Nitrate-N
  • Nitrite-N
  • O Diss %sat
  • Oil & Grs Vs
  • Orthophospht
  • Oxygen Diss
  • PFOS
  • PFdecncAcid
  • PFdodencAcid
  • PFheptncAcid
  • PFhexncAcid
  • PFnonncAcid
  • PFoctncAcid
  • PFpentncAcid
  • PFtetdncAcid
  • PFundencAcid
  • Pb Filtered
  • Phenol Odour
  • SI-EC-F
  • SI-GQA
  • SI-LIST2
  • Sld Sus@105C
  • Temp Water
  • Type of Flow
  • Vanadium - V
  • Zinc - as Zn
  • Zn- Filtered
  • pFoctanoate
  • pH
  • pH in-situ

Sampling results

Displaying the twenty most recent samples. You can see all 265 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 2 Aug 2023 to 6 Aug 2024

NotationDeterminandUnits 2 Aug
2023
11:35
1 Sep
2023
09:56
13 Oct
2023
10:28
16 Nov
2023
11:10
11 Dec
2023
09:24
11 Jan
2024
10:33
5 Feb
2024
13:10
4 Mar
2024
12:34
2 Jul
2024
12:25
6 Aug
2024
09:50
0061pH7.997.877.577.797.967.888.047.587.967.76
0076Temperature of Water°C17.115.315.38.27.54.49.69.616.118.2
0077Conductivity at 25 Cμs/cm652683672627611654701756662675
0111Ammoniacal Nitrogen as Nmg/l< 0.03< 0.030.80.130.390.0740.0576.80.130.16
0116Nitrogen, Total Oxidised as Nmg/l5.46.64.64.43.95.16.33.84.24.6
0117Nitrate as Nmg/l5.356.584.494.373.885.086.273.574.094.55
0118Nitrite as Nmg/l0.0480.0180.110.0270.0250.0250.0270.230.110.051
0119Ammonia un-ionised as Nmg/l< 0.0009< 0.00060.008120.001290.005410.000680.001010.04630.003380.00309
0162Alkalinity to pH 4.5 as CaCO3mg/l250250250230210240260250260270
0180Orthophosphate, reactive as Pmg/l0.130.120.260.160.150.140.690.0880.14
9901Oxygen, Dissolved, % Saturation%97.890.747.472.473.883.395.981.289.268.3
9924Oxygen, Dissolved as O2mg/l9.419.064.748.528.8410.810.99.248.766.42

Samples from 14 Oct 2022 to 11 Jul 2023

NotationDeterminandUnits14 Oct
2022
12:18
2 Nov
2022
11:03
2 Dec
2022
10:36
19 Jan
2023
11:41
3 Feb
2023
10:30
3 Mar
2023
12:25
5 Apr
2023
10:43
4 May
2023
11:15
6 Jun
2023
09:52
11 Jul
2023
13:30
0061pH7.798.047.977.927.978.018.018.087.828.04
0076Temperature of Water°C13.111.77.93.58.36.69.512.613.918.9
0077Conductivity at 25 Cμs/cm776617677633722708642672688667
0111Ammoniacal Nitrogen as Nmg/l< 0.03< 0.030.0410.0480.05< 0.03< 0.030.030.0550.054
0116Nitrogen, Total Oxidised as Nmg/l125.46.94.57.17.84.86.15.65.2
0117Nitrate as Nmg/l125.396.884.487.087.794.796.085.585.12
0118Nitrite as Nmg/l0.0210.0150.0180.0190.020.010.0140.0160.0250.082
0119Ammonia un-ionised as Nmg/l< 0.00043< 0.000620.00060.000450.00075< 0.00043< 0.000530.000660.000890.00188
0162Alkalinity to pH 4.5 as CaCO3mg/l220220230210250250220240270250
0180Orthophosphate, reactive as Pmg/l0.20.130.160.110.110.0960.0860.0560.110.17
9901Oxygen, Dissolved, % Saturation%90.287.486.388.590.793.294.8100.480.971.7
9924Oxygen, Dissolved as O2mg/l9.469.4610.211.710.611.410.810.68.336.65