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sampling point
Bristol Avon At Monkton House

Description D/S CHALFIELD BROOK
Sampling point ID SW-Z1011701
Type Freshwater – Rivers
Status open
Location easting northing: 388435 162334
lat lon: 51.35995, -2.167478
Area Wessex
Sub-Area East Wessex
Summary 251 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.

43 determinands have been measured at this site
  • Action taken
  • Alky pH 4.5
  • Ammonia(N)
  • BOD ATU
  • C - Org Filt
  • CHLOR A
  • CHLOROPHYLL
  • COD as O2
  • Ca Filtered
  • Calcium - Ca
  • Chloride Ion
  • Chlorophyl-A
  • Cond @ 20C
  • Cond @ 25C
  • Cu Filtered
  • Fe- Filt
  • Hardness
  • Hdnss Ca
  • Hdnss Mg
  • Magnesium-Mg
  • Mg Filtered
  • Mineral Oils
  • Mn BLM Bio
  • Mn- Filtered
  • N Inorganic
  • N Oxidised
  • NH3 un-ion
  • Nitrate-N
  • Nitrite-N
  • O Diss %sat
  • Oil & Grs Vs
  • Orthophospht
  • Oxygen Diss
  • Phenol Odour
  • PhenolicOdor
  • Potassium- K
  • SiO2 Rv
  • Sld Sus@105C
  • Temp Water
  • Type of Flow
  • WethPresPrec
  • Zinc - as Zn
  • pH

Sampling results

Displaying the twenty most recent samples. You can see all 251 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).

Samples from 14 Sep 2023 to 17 May 2024

NotationDeterminandUnits14 Sep
2023
09:36
24 Oct
2023
10:48
14 Nov
2023
10:33
29 Nov
2023
12:14
13 Dec
2023
08:15
24 Jan
2024
10:31
20 Feb
2024
09:39
21 Mar
2024
11:09
24 Apr
2024
09:03
17 May
2024
10:38
0061pH7.747.868.018.157.848.058.058.228.238.25
0076Temperature of Water°C18.211.910.57.78.67.99.611.39.615.2
0077Conductivity at 25 Cμs/cm811624597648519543546620652664
0085BOD : 5 Day ATUmg/l< 21.31.62.2
0111Ammoniacal Nitrogen as Nmg/l0.10.061< 0.030.0670.0680.120.0550.0610.0340.041
0116Nitrogen, Total Oxidised as Nmg/l7.764.15.83.93.856.25.7
0117Nitrate as Nmg/l7.625.964.095.753.863.784.966.185.67
0118Nitrite as Nmg/l0.0780.0370.0110.050.0440.0480.0240.0370.020.03
0119Ammonia un-ionised as Nmg/l0.001850.00093< 0.000570.001030.000780.001880.000970.001220.00060.00109
0162Alkalinity to pH 4.5 as CaCO3mg/l250240250270220220250260260260
0180Orthophosphate, reactive as Pmg/l0.320.130.0770.10.0920.0890.10.0960.0620.12
9901Oxygen, Dissolved, % Saturation%66.685.681.998.180.692.29097.396.299.7
9924Oxygen, Dissolved as O2mg/l6.269.239.1211.79.3910.910.210.610.99.98

Samples from 28 Oct 2022 to 7 Aug 2023

NotationDeterminandUnits28 Oct
2022
14:03
14 Nov
2022
12:43
19 Jan
2023
11:49
13 Feb
2023
10:25
27 Feb
2023
13:13
6 Mar
2023
12:18
18 May
2023
15:29
20 Jun
2023
09:04
21 Jul
2023
12:38
7 Aug
2023
10:34
0061pH7.657.967.918.258.338.488.127.837.777.99
0076Temperature of Water°C14.913.167.96.66.714.818.817.115.7
0077Conductivity at 25 Cμs/cm761702624709758739669689680642
0085BOD : 5 Day ATUmg/l< 3
0111Ammoniacal Nitrogen as Nmg/l0.070.0630.10.0770.170.120.0520.050.0410.038
0116Nitrogen, Total Oxidised as Nmg/l7.5116.47.68.97.96.66.575.3
0117Nitrate as Nmg/l7.45116.347.558.837.866.566.436.95.27
0118Nitrite as Nmg/l0.0530.0380.0560.0460.070.0360.0380.0660.10.033
0119Ammonia un-ionised as Nmg/l0.000830.001320.001110.00120.002420.001720.001350.001180.000750.00103
0162Alkalinity to pH 4.5 as CaCO3mg/l180220210250260250250220210210
0180Orthophosphate, reactive as Pmg/l0.220.110.110.0940.120.10.0770.170.170.18
9901Oxygen, Dissolved, % Saturation%75.28991.8100.9108.9115.8107.26981.180.5
9924Oxygen, Dissolved as O2mg/l7.589.3311.41213.314.110.86.417.87.98