sampling point
Horton Brook Above Colne Brook
| Description | HORTON BROOK ABOVE COLNE BROOK |
|---|---|
| Sampling point ID | TH-PCNR0063 |
| Type | Freshwater – Rivers |
| Status | open |
| Location |
easting northing: 501847 172413 lat lon: 51.441559, -0.535997 |
| Area | Hertfordshire And North London |
| Sub-Area | L&W Herts & North London |
| Summary | 173 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.
48 determinands have been measured at this site
- 4-nonPhenol
- Action taken
- Alky pH 4.5
- Ammonia(N)
- AmoniaTotYSI
- B-[a]-pyrene
- B-[b]-fluora
- B-[ghi]-pery
- B-[k]-fluora
- BOD ATU
- C - Org Filt
- Ca Filtered
- Calcium - Ca
- Cd Filtered
- Chloride Ion
- Cond @ 25C
- Cr- Filtered
- Cu BLM Bio
- Cu Filtered
- DEHP
- Fe- Filt
- Fluoranthene
- Hardness
- Ind123pyrene
- Magnesium-Mg
- Mn BLM Bio
- Mn- Filtered
- N Oxidised
- NH3 un-ion
- Ni BLM Bio
- Ni- Filtered
- Nitrate-N
- Nitrite-N
- O Diss %sat
- Orthophospht
- Oxygen Diss
- Pb BLM Bio
- Pb Filtered
- SI-GQA
- Sld Sus@105C
- Temp Water
- Triclosan
- Type of Flow
- Zn BLM Bio
- Zn- Filtered
- pH
- pH in-situ
- ptOctylPheno
Sampling results
Displaying the twenty most recent samples. You can see all 173 sample results (note that in some cases this may take a considerable time, and use significant data bandwidth).
Samples from 4 Sep 2019 to 1 Aug 2024
Samples from 3 Mar 2017 to 7 Aug 2019
| Notation | Determinand | Units | 3 Mar 2017 11:31 | 11 Apr 2017 11:53 | 18 May 2017 13:02 | 16 Jun 2017 12:08 | 13 Jul 2017 12:31 | 4 Aug 2017 08:42 | 19 Sep 2017 13:59 | 19 Jun 2019 10:57 | 23 Jul 2019 10:35 | 7 Aug 2019 11:21 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0061 | pH | 7.76 | 7.78 | 7.94 | 7.84 | |||||||
| 0076 | Temperature of Water | °C | 15.6 | 17.7 | 21.2 | 19 | ||||||
| 0077 | Conductivity at 25 C | μs/cm | 689 | 742 | 705 | 633 | ||||||
| 0111 | Ammoniacal Nitrogen as N | mg/l | 0.092 | 0.05 | 0.037 | 0.051 | ||||||
| 0116 | Nitrogen, Total Oxidised as N | mg/l | 0.63 | 1.6 | 1.1 | 0.6 | ||||||
| 0117 | Nitrate as N | mg/l | 0.608 | 1.56 | 1.08 | 0.59 | ||||||
| 0118 | Nitrite as N | mg/l | 0.0223 | 0.036 | 0.018 | 0.01 | ||||||
| 0119 | Ammonia un-ionised as N | mg/l | 0.00147 | 0.00097 | 0.00133 | 0.00125 | ||||||
| 0162 | Alkalinity to pH 4.5 as CaCO3 | mg/l | 168 | 160 | 130 | 95 | ||||||
| 0180 | Orthophosphate, reactive as P | mg/l | 0.075 | 0.086 | 0.069 | 0.04 | ||||||
| 0714 | Benzo(g,h,i)Perylene | μg/l | 8.0e-05 | 0.00012 | 0.00023 | 0.0001 | 0.00028 | |||||
| 0731 | Benzo(b)Fluoranthene | μg/l | 7.0e-05 | 0.00017 | 0.00025 | 0.00014 | 0.00025 | |||||
| 0733 | Benzo(k)Fluoranthene | μg/l | 3.0e-05 | 7.0e-05 | 0.00011 | 5.0e-05 | 0.00012 | |||||
| 0736 | Fluoranthene | μg/l | 0.00063 | 0.00164 | 0.0022 | 0.00163 | 0.00156 | |||||
| 0746 | Indeno(1,2,3-cd)pyrene | μg/l | 8.0e-05 | 0.00012 | 0.00024 | 0.00011 | 0.00029 | |||||
| 6399 | Benzo(a)Pyrene | μg/l | 5.0e-05 | 3.0e-05 | 7.0e-05 | 0.0001 | 0.0002 | 7.0e-05 | 0.00021 | |||
| 9901 | Oxygen, Dissolved, % Saturation | % | 67.6 | 76.2 | 74.7 | 64.8 | ||||||
| 9924 | Oxygen, Dissolved as O2 | mg/l | 6.71 | 7.24 | 6.62 | 6 |