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sampling point
Rib At Aspenden Bridge, Aspenden

Description RIB AT ASPENDEN BRIDGE, ASPENDEN
Sampling point ID TH-PLER0298
Type Freshwater – Unspecified
Status open
Location easting northing: 536338 228550
lat lon: 51.938752, -0.018099
Area Hertfordshire And North London
Sub-Area L&W Herts & North London
Summary 79 samples taken between 2024 and 2017

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.

24 determinands have been measured at this site
  • Alky pH 4.5
  • Ammonia(N)
  • B-[a]-pyrene
  • B-[b]-fluora
  • B-[ghi]-pery
  • B-[k]-fluora
  • BOD ATU
  • Chloride Ion
  • Cond @ 25C
  • Fluoranthene
  • HBCDD
  • Ind123pyrene
  • N Oxidised
  • NH3 un-ion
  • Nitrate-N
  • Nitrite-N
  • O Diss %sat
  • Orthophospht
  • Oxygen Diss
  • PFOS
  • Sld Sus@105C
  • Temp Water
  • pFoctanoate
  • pH

Sampling results

Displaying the twenty most recent samples. You can see all 79 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 5 Dec 2023 to 2 Sep 2024

NotationDeterminandUnits 5 Dec
2023
09:22
4 Jan
2024
09:35
1 Feb
2024
12:42
7 Mar
2024
11:20
4 Apr
2024
11:26
1 May
2024
08:36
12 Jun
2024
11:28
1 Jul
2024
08:44
1 Aug
2024
11:29
2 Sep
2024
10:56
0061pH8.368.218.048.077.947.948.138.07
0076Temperature of Water°C6.67.78.78.813.315.718.719.3
0077Conductivity at 25 Cμs/cm720737969850955102210301156
0085BOD : 5 Day ATUmg/l< 31.71.71.42.31.11.8< 3< 5< 3
0111Ammoniacal Nitrogen as Nmg/l< 0.030.160.0860.086< 0.5< 0.50.0680.0790.0810.037
0116Nitrogen, Total Oxidised as Nmg/l151322147.51520221926
0117Nitrate as Nmg/l151321.913.919.921.918.925.9
0118Nitrite as Nmg/l0.0160.0380.060.0540.0640.080.130.059
0119Ammonia un-ionised as Nmg/l< 0.000430.002470.001430.001440.001380.001910.002780.00133
0135Solids, Suspended at 105 Cmg/l159.1116.2238.35217< 313
0162Alkalinity to pH 4.5 as CaCO3mg/l240260250280260240260230
0172Chloridemg/l312772453145708594130
0180Orthophosphate, reactive as Pmg/l0.270.31.90.71< 0.51.12.32.83.21.6
9901Oxygen, Dissolved, % Saturation%96.896.5100.2102.395.889.593.994.4
9924Oxygen, Dissolved as O2mg/l11.811.511.611.9108.868.738.67

Samples from 2 Mar 2023 to 3 Nov 2023

NotationDeterminandUnits 2 Mar
2023
10:57
30 Mar
2023
11:34
18 May
2023
15:49
1 Jun
2023
09:36
30 Jun
2023
14:53
17 Jul
2023
08:13
1 Aug
2023
10:31
6 Sep
2023
09:26
4 Oct
2023
13:40
3 Nov
2023
10:14
0061pH7.878.47.987.847.777.847.977.647.588.2
0076Temperature of Water°C9.211.314.613.818.916.51820.217.510.5
0077Conductivity at 25 Cμs/cm1161766979107898896310611269767679
0085BOD : 5 Day ATUmg/l5.51.31.31.91.2< 3< 3< 3< 21.2
0111Ammoniacal Nitrogen as Nmg/l0.19< 0.030.520.090.240.0740.080.0870.120.073
0116Nitrogen, Total Oxidised as Nmg/l31121928221922282918
0117Nitrate as Nmg/l30.81218.827.921.918.921.927.928.918
0118Nitrite as Nmg/l0.190.0180.160.110.120.10.10.130.130.017
0119Ammonia un-ionised as Nmg/l0.00243< 0.00060.01270.001510.004990.001510.002440.001480.001470.00138
0135Solids, Suspended at 105 Cmg/l1307.45.66.3163121328435
0162Alkalinity to pH 4.5 as CaCO3mg/l210260240220190200220230200230
0172Chloridemg/l12041761001009511014012019
0180Orthophosphate, reactive as Pmg/l4.20.5523.24.83.34.26.64.60.18
9901Oxygen, Dissolved, % Saturation%97.893.1105.588.888.38086.983.487.699.9
9924Oxygen, Dissolved as O2mg/l11.210.210.79.168.187.798.27.528.3511.1