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sampling point
Chess At Bois Mill, Chesham

Description CHESS AT BOIS MILL, CHESHAM
Sampling point ID TH-PCNR0014
Type Freshwater – Rivers
Status open
Location easting northing: 498391 199374
lat lon: 51.68451, -0.578168
Area Hertfordshire And North London
Sub-Area L&W Herts & North London
Summary 246 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.

95 determinands have been measured at this site
  • Action taken
  • Al- Filtered
  • Alky pH 4.5
  • Aluminium-Al
  • Ammonia(N)
  • AmoniaTotYSI
  • B-[a]-pyrene
  • B-[b]-fluora
  • B-[ghi]-pery
  • B-[k]-fluora
  • BOD ATU
  • C - Org Filt
  • C Organic DW
  • Ca Filtered
  • Cadmium - Cd
  • Calcium - Ca
  • Cd - Dry Wt
  • Cd Filtered
  • Chloride Ion
  • Cond @ 25C
  • Cr- Filtered
  • Cu Filtered
  • DEHP
  • DrySolids30C
  • Fe- Filt
  • Fluoranthene
  • GS Kurtosis
  • GS Mean
  • GS Median
  • GSF 160-112
  • GSF 11.4-9.1
  • GSF 112-84
  • GSF 125-249
  • GSF 1k- 2k
  • GSF 2000-500
  • GSF 250-499
  • GSF 261-160
  • GSF 2k-4k
  • GSF 39-30.3
  • GSF 50.2-39
  • GSF 500-999
  • GSF 564-261
  • GSF 62.5-124
  • GSF 64-50
  • GSF 7.2-5.8
  • GSF 84-64
  • GSF 9.1-7.2
  • GSF <20
  • GSF <2000um
  • GSF <5.8 um
  • GSF >2000um
  • GSF >8000
  • GSF14.5-11.4
  • GSF18.5-14.5
  • GSF23.7-18.5
  • GSF30.3-23.7
  • GSF4000-7999
  • GraphSkewn
  • Hardness
  • Hg - Dry Wt
  • Hg Filtered
  • Ind123pyrene
  • Magnesium-Mg
  • Mean dia
  • Median dia
  • Mercury - Hg
  • Mg Filtered
  • Mn BLM Bio
  • Mn- Filtered
  • N Oxidised
  • NH3 un-ion
  • Ni- Filtered
  • Nitrate-N
  • Nitrite-N
  • O Diss %sat
  • Orthophospht
  • Oxygen Diss
  • Pb Filtered
  • SI-EC-CD
  • SI-EC-HG
  • SI-GQA
  • Sample Prep
  • Sieved < 63
  • Sld Sus@105C
  • Sld V @400C
  • Sld V @480C
  • Solids <63um
  • Sort Coeff
  • Temp Water
  • TriBT Cation
  • Triclosan
  • Type of Flow
  • Zn- Filtered
  • pH
  • pH in-situ

Sampling results

Displaying the twenty most recent samples. You can see all 246 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 3 Aug 2022 to 2 Jul 2024

NotationDeterminandUnits 3 Aug
2022
14:21
7 Sep
2022
09:44
25 Oct
2022
14:36
10 Nov
2022
11:36
13 Dec
2022
11:55
25 Jan
2023
11:34
22 Feb
2023
08:42
1 Mar
2023
10:47
4 Jun
2024
12:38
2 Jul
2024
14:56
0061pH7.597.657.717.697.797.887.877.687.6
0076Temperature of Water°C18.516.414.613.17.18.39.98.913.914.5
0077Conductivity at 25 Cμs/cm773783649784805718711709660668
0085BOD : 5 Day ATUmg/l< 3< 1< 311.21.61.11.33.3< 1
0111Ammoniacal Nitrogen as Nmg/l0.10.070.0680.0790.0810.0690.120.090.630.14
0116Nitrogen, Total Oxidised as Nmg/l17151115191412137.28.6
0117Nitrate as Nmg/l16.814.910.914.918.91411.912.97.088.49
0118Nitrite as Nmg/l0.170.0820.070.0880.070.0440.0740.0880.120.11
0119Ammonia un-ionised as Nmg/l0.001340.000920.00090.00090.000740.000850.001620.000730.00143
0162Alkalinity to pH 4.5 as CaCO3mg/l220200190230230230240240260240
0180Orthophosphate, reactive as Pmg/l0.720.660.560.330.580.260.350.360.180.037
9901Oxygen, Dissolved, % Saturation%80.271.573.580.777.59483.880.968.183.9
9924Oxygen, Dissolved as O2mg/l7.56.987.468.469.37119.469.367.028.53

Samples from 3 Feb 2020 to 12 Jul 2022

NotationDeterminandUnits 3 Feb
2020
10:48
4 Mar
2020
12:13
4 May
2021
10:22
8 Jun
2021
11:27
1 Jul
2021
13:47
5 Aug
2021
12:39
21 Apr
2022
09:18
6 May
2022
08:54
28 Jun
2022
15:03
12 Jul
2022
11:23
0061pH7.787.667.797.917.567.67.687.717.747.68
0076Temperature of Water°C9.79.210.614.414.815.711.111.916.417.9
0077Conductivity at 25 Cμs/cm697584660692675705718718738769
0085BOD : 5 Day ATUmg/l1.31.61.5< 3
0111Ammoniacal Nitrogen as Nmg/l0.110.10.0870.0990.140.120.0840.140.120.073
0116Nitrogen, Total Oxidised as Nmg/l119.88.4109.91113131715
0117Nitrate as Nmg/l10.89.698.329.939.8110.912.912.916.914.9
0118Nitrite as Nmg/l0.230.110.0830.0660.0940.0730.10.0980.0890.099
0119Ammonia un-ionised as Nmg/l0.001190.000790.001030.002030.001340.001340.00080.001520.001940.00115
0162Alkalinity to pH 4.5 as CaCO3mg/l230230240240240230230230220170
0180Orthophosphate, reactive as Pmg/l0.560.340.590.470.310.290.490.460.840.59
9901Oxygen, Dissolved, % Saturation%73.185.876.183.377.386.485.790.990.783.1
9924Oxygen, Dissolved as O2mg/l8.299.858.458.497.818.569.419.88.857.86