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sampling point
River Tamar At Polson Bridge

Description RIVER TAMAR AT POLSON BRIDGE BELOW ST. LEONARD'S STW
Sampling point ID SW-81290111
Type Freshwater – Rivers
Status open
Location easting northing: 235559 84927
lat lon: 50.64077, -4.326979
Area Devon And Cornwall
Sub-Area Central Devon And Cornwall
Summary 253 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.

83 determinands have been measured at this site
  • Action taken
  • Al- Filtered
  • Alky pH 4.5
  • Aluminium-Al
  • Ammonia(N)
  • Arsenic - As
  • As-Filtered
  • B - Filtered
  • BOD ATU
  • BOD5DyATUFil
  • Ba- Filtered
  • Barium - Ba
  • Boron - as B
  • C - Org Filt
  • CHLOROPHYLL
  • Ca Filtered
  • Cadmium - Cd
  • Calcium - Ca
  • Cd Filtered
  • Chloride Ion
  • Chlorophyl-A
  • Chromium -Cr
  • ColformsPre
  • Cond @ 20C
  • Cond @ 25C
  • Copper - Cu
  • Cr- Filtered
  • Cu Filtered
  • Dtrgt NncSyn
  • DtrgtAncSyn
  • F Coli Pre
  • Fe- Filt
  • GCMS S-Vol
  • Hardness
  • Hdnss Ca
  • Hdnss Mg
  • IonicBalance
  • Iron - as Fe
  • K- Filtered
  • Lead - as Pb
  • Lithium - Li
  • Lithium Filt
  • Magnesium-Mg
  • Manganse-Mn
  • Mg Filtered
  • Mineral Oils
  • Mn- Filtered
  • N Digested
  • N Inorganic
  • N Oxidised
  • N-Kjeldahl
  • NATGRIDREF
  • NH3 un-ion
  • Na- Filtered
  • Ni- Filtered
  • Nickel - Ni
  • Nitrate-N
  • Nitrite-N
  • O Diss %sat
  • Oil & Grs Vs
  • Orthophospht
  • Oxygen Diss
  • Pb Filtered
  • Phenol Odour
  • PhenolicOdor
  • Phosphorus-P
  • Potassium- K
  • SO4dis
  • SiO2 Rv
  • Sld Sus@105C
  • Sodium - Na
  • StrepF PMF
  • Strontium-Sr
  • StrontumFilt
  • Sulphate SO4
  • Temp Water
  • TurbidityNTU
  • Type of Flow
  • WethPresPrec
  • Zinc - as Zn
  • Zn- Filtered
  • pH
  • pH in-situ

Sampling results

Displaying the twenty most recent samples. You can see all 253 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 29 Jun 2023 to 4 Mar 2024

NotationDeterminandUnits29 Jun
2023
15:06
26 Jul
2023
13:25
15 Aug
2023
10:17
7 Sep
2023
12:57
13 Oct
2023
09:51
1 Nov
2023
10:49
8 Dec
2023
14:18
18 Jan
2024
11:55
7 Feb
2024
10:39
4 Mar
2024
12:43
0061pH8.327.627.617.767.177.127.217.377.367.29
0076Temperature of Water°C19.315.315.519.515.812.19.12.4107.2
0077Conductivity at 25 Cμs/cm260234204228167169176205126187
0111Ammoniacal Nitrogen as Nmg/l< 0.030.044< 0.03< 0.030.190.110.0570.0490.130.13
0116Nitrogen, Total Oxidised as Nmg/l1.62.21.81.61.31.62.42.312.1
0117Nitrate as Nmg/l1.592.191.791.61.281.592.392.290.9882.09
0118Nitrite as Nmg/l0.00910.00670.00820.00490.0160.0120.0110.0130.0120.015
0119Ammonia un-ionised as Nmg/l< 0.001080.0005< 0.00034< 0.000640.00080.000310.000160.000120.000550.00038
0162Alkalinity to pH 4.5 as CaCO3mg/l59384149404135382937
0180Orthophosphate, reactive as Pmg/l0.0190.0380.0420.0310.0630.0550.0430.030.04
9901Oxygen, Dissolved, % Saturation%104.398.494.3102.988.990.793.898.693.496.2
9924Oxygen, Dissolved as O2mg/l9.599.839.389.438.799.7310.813.510.511.6

Samples from 11 Jun 2019 to 11 Mar 2020

NotationDeterminandUnits11 Jun
2019
12:11
9 Jul
2019
15:37
19 Aug
2019
09:52
12 Sep
2019
12:22
11 Oct
2019
10:03
25 Nov
2019
12:09
5 Dec
2019
12:46
6 Jan
2020
08:58
12 Feb
2020
09:57
11 Mar
2020
12:05
0061pH7.628.277.447.77.47.417.37.468.027.39
0076Temperature of Water°C12.118.615.515.813.510.55.68.35.89.6
0077Conductivity at 25 Cμs/cm213266218223182192201107208185
0111Ammoniacal Nitrogen as Nmg/l0.161< 0.030.033< 0.030.0580.0440.0450.0690.120.4
0116Nitrogen, Total Oxidised as Nmg/l2.041.92.11.522.72.92.42.11.7
0117Nitrate as Nmg/l2.011.892.091.51.992.692.892.382.081.67
0118Nitrite as Nmg/l0.03260.0080.00660.00430.0130.0140.0150.0190.0170.03
0119Ammonia un-ionised as Nmg/l0.00145< 0.001020.00025< 0.000420.000350.000220.000120.000320.001610.00176
0162Alkalinity to pH 4.5 as CaCO3mg/l43603356403536373842
0180Orthophosphate, reactive as Pmg/l0.0890.230.0730.140.0650.0330.0450.0480.0240.12
9901Oxygen, Dissolved, % Saturation%89112.991.493.790.496.39997.49593.3
9924Oxygen, Dissolved as O2mg/l9.5510.59.099.269.410.712.411.411.910.6