Southern England summary results - Revision history

Ajhil: /* Contact */

2026-05-08T10:19:11Z

Contact

← Older revision		Revision as of 11:19, 8 May 2026
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	===Contact===		===Contact===
	Please contact BGS Enquiries for more information.		Please contact [https://www.bgs.ac.uk/about-bgs/contact-us/ BGS Enquiries] for more information.
	[[category:Groundwater and shale gas]]		[[category:Groundwater and shale gas]]

Ajhil: /* Baseline groundwater quality data in the Palaeogene */

2026-05-08T10:18:06Z

Baseline groundwater quality data in the Palaeogene

← Older revision		Revision as of 11:18, 8 May 2026
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	===Baseline groundwater quality data in the Palaeogene===		===Baseline groundwater quality data in the Palaeogene===
	A summary of the baseline quality of groundwater in the Palaeogene is below. These data were collected as part of a collaborative project between BGS and the Environment Agency to investigate the [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ baseline quality of groundwater in major UK aquifers]. The [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ UK baseline study results] results page provides downloads of all the reports produced by the project.		A summary of the baseline quality of groundwater in the Palaeogene is below. These data were collected as part of a collaborative project between BGS and the Environment Agency to investigate the [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ baseline quality of groundwater in major UK aquifers]. The [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ UK baseline study results] results page provides downloads of all the reports produced by the project.

			[[Image:SouthPalaeogeneBOX.jpg\|frameless\|center\|500px\|]]

	{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"		{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"
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	\|26		\|26
	\|-		\|-
	\|SO<~~small~~>4</~~small~~>		\|SO<sub>4</sub>
	\|2.7		\|2.7
	\|27.4		\|27.4
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	\|26		\|26
	\|-		\|-
	\|HCO<~~small~~>3</~~mall~~>		\|HCO<sub>3</sub>
	\|5		\|5
	\|153		\|153
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	\|25		\|25
	\|-		\|-
	\|NO<~~small~~>3</~~small~~>.N		\|NO<sub>3</sub>.N
	\|<0.01		\|<0.01
	\|0.0244		\|0.0244
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	\|}		\|}

	<center>B'''~~aseline~~ quality data for the Palaeogene in southern England'''</center>		<center>'''Baseline quality data for the Palaeogene in southern England'''</center>

	The water quality of oxidising Palaeogene groundwaters of near-neutral pH is, in the most part, good. High iron and manganese as well as slightly acidic conditions are characteristics of the Palaeogene groundwaters. In these more acidic groundwaters, mobilisation of some trace metals can occur. Some unconfined waters in the Palaeogene are influenced by agricultural activities, showing elevated nitrate (NO<sub>3</sub>.N) concentrations. The hydrochemical properties of the groundwaters in the Palaeogene aquifers are primarily determined by natural reactions between recharge water and the Palaeogene host rocks.		The water quality of oxidising Palaeogene groundwaters of near-neutral pH is, in the most part, good. High iron and manganese as well as slightly acidic conditions are characteristics of the Palaeogene groundwaters. In these more acidic groundwaters, mobilisation of some trace metals can occur. Some unconfined waters in the Palaeogene are influenced by agricultural activities, showing elevated nitrate (NO<sub>3</sub>.N) concentrations. The hydrochemical properties of the groundwaters in the Palaeogene aquifers are primarily determined by natural reactions between recharge water and the Palaeogene host rocks.

Ajhil: /* Baseline groundwater quality data in the Palaeogene */

2026-05-08T10:16:26Z

Baseline groundwater quality data in the Palaeogene

← Older revision		Revision as of 11:16, 8 May 2026
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	\|}		\|}

	<~~small~~>~~Baseline~~ quality data for the Palaeogene in southern England</~~small~~>		<center>B'''aseline quality data for the Palaeogene in southern England'''</center>

	The water quality of oxidising Palaeogene groundwaters of near-neutral pH is, in the most part, good. High iron and manganese as well as slightly acidic conditions are characteristics of the Palaeogene groundwaters. In these more acidic groundwaters, mobilisation of some trace metals can occur. Some unconfined waters in the Palaeogene are influenced by agricultural activities, showing elevated nitrate (NO<sub>3</sub>.N) concentrations. The hydrochemical properties of the groundwaters in the Palaeogene aquifers are primarily determined by natural reactions between recharge water and the Palaeogene host rocks.		The water quality of oxidising Palaeogene groundwaters of near-neutral pH is, in the most part, good. High iron and manganese as well as slightly acidic conditions are characteristics of the Palaeogene groundwaters. In these more acidic groundwaters, mobilisation of some trace metals can occur. Some unconfined waters in the Palaeogene are influenced by agricultural activities, showing elevated nitrate (NO<sub>3</sub>.N) concentrations. The hydrochemical properties of the groundwaters in the Palaeogene aquifers are primarily determined by natural reactions between recharge water and the Palaeogene host rocks.

Ajhil: /* Baseline groundwater quality data in the Palaeogene */

2026-05-08T10:16:02Z

Baseline groundwater quality data in the Palaeogene

← Older revision		Revision as of 11:16, 8 May 2026
Line 261:		Line 261:

	===Baseline groundwater quality data in the Palaeogene===		===Baseline groundwater quality data in the Palaeogene===
	A summary of the baseline quality of groundwater in the Palaeogene is below. These data were collected as part of a collaborative project between BGS and the Environment Agency to investigate the baseline quality of groundwater in major UK aquifers. The UK baseline study results page provides downloads of all the reports produced by the project.		A summary of the baseline quality of groundwater in the Palaeogene is below. These data were collected as part of a collaborative project between BGS and the Environment Agency to investigate the [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ baseline quality of groundwater in major UK aquifers]. The [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ UK baseline study results] results page provides downloads of all the reports produced by the project.

	{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"		{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"

Ajhil: /* Baseline groundwater quality data in the Palaeogene */

2026-05-08T10:15:17Z

Baseline groundwater quality data in the Palaeogene

← Older revision		Revision as of 11:15, 8 May 2026
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	<small>Baseline quality data for the Palaeogene in southern England</small>		<small>Baseline quality data for the Palaeogene in southern England</small>

	The water quality of oxidising Palaeogene groundwaters of near-neutral pH is, in the most part, good. High iron and manganese as well as slightly acidic conditions are characteristics of the Palaeogene groundwaters. In these more acidic groundwaters, mobilisation of some trace metals can occur. Some unconfined waters in the Palaeogene are influenced by agricultural activities, showing elevated nitrate (NO<~~small~~>3</~~small~~>.N) concentrations. The hydrochemical properties of the groundwaters in the Palaeogene aquifers are primarily determined by natural reactions between recharge water and the Palaeogene host rocks.		The water quality of oxidising Palaeogene groundwaters of near-neutral pH is, in the most part, good. High iron and manganese as well as slightly acidic conditions are characteristics of the Palaeogene groundwaters. In these more acidic groundwaters, mobilisation of some trace metals can occur. Some unconfined waters in the Palaeogene are influenced by agricultural activities, showing elevated nitrate (NO<sub>3</sub>.N) concentrations. The hydrochemical properties of the groundwaters in the Palaeogene aquifers are primarily determined by natural reactions between recharge water and the Palaeogene host rocks.

	===Contact===		===Contact===
	Please contact BGS Enquiries for more information.		Please contact BGS Enquiries for more information.
	[[category:Groundwater and shale gas]]		[[category:Groundwater and shale gas]]

Ajhil: /* Baseline groundwater quality data in the Chalk of Dorset */

2026-05-08T10:14:52Z

Baseline groundwater quality data in the Chalk of Dorset

← Older revision		Revision as of 11:14, 8 May 2026
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	<center>'''Baseline quality data for the Lower Greensand in southern England'''</center>		<center>'''Baseline quality data for the Lower Greensand in southern England'''</center>

	The Dorset Chalk contains groundwater predominately of very high quality. However, much of the area is farmed, the long term effects of which have impacted on the natural groundwater quality. The main observed effect of agricultural activity has been the increase in nitrate (NO<~~small~~>3</~~small~~>.N) and potassium (K) over several decades. Apart from these examples, there is no evidence of widespread contamination from urban and rural wastes or other sources of pollution. Oxidising conditions found in the unconfined aquifer rapidly give way to a reducing environment as the aquifer becomes confined beneath Palaeogene deposits.		The Dorset Chalk contains groundwater predominately of very high quality. However, much of the area is farmed, the long term effects of which have impacted on the natural groundwater quality. The main observed effect of agricultural activity has been the increase in nitrate (NO<sub>3</sub>.N) and potassium (K) over several decades. Apart from these examples, there is no evidence of widespread contamination from urban and rural wastes or other sources of pollution. Oxidising conditions found in the unconfined aquifer rapidly give way to a reducing environment as the aquifer becomes confined beneath Palaeogene deposits.

	===Baseline groundwater quality data in the Palaeogene===		===Baseline groundwater quality data in the Palaeogene===

Ajhil: /* Baseline groundwater quality data in the Chalk of Dorset */

2026-05-08T10:14:18Z

Baseline groundwater quality data in the Chalk of Dorset

← Older revision		Revision as of 11:14, 8 May 2026
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	\|}		\|}

	<~~small~~>Baseline quality data for the Lower Greensand in southern England</~~small~~>		<center>'''Baseline quality data for the Lower Greensand in southern England'''</center>

	The Dorset Chalk contains groundwater predominately of very high quality. However, much of the area is farmed, the long term effects of which have impacted on the natural groundwater quality. The main observed effect of agricultural activity has been the increase in nitrate (NO<small>3</small>.N) and potassium (K) over several decades. Apart from these examples, there is no evidence of widespread contamination from urban and rural wastes or other sources of pollution. Oxidising conditions found in the unconfined aquifer rapidly give way to a reducing environment as the aquifer becomes confined beneath Palaeogene deposits.		The Dorset Chalk contains groundwater predominately of very high quality. However, much of the area is farmed, the long term effects of which have impacted on the natural groundwater quality. The main observed effect of agricultural activity has been the increase in nitrate (NO<small>3</small>.N) and potassium (K) over several decades. Apart from these examples, there is no evidence of widespread contamination from urban and rural wastes or other sources of pollution. Oxidising conditions found in the unconfined aquifer rapidly give way to a reducing environment as the aquifer becomes confined beneath Palaeogene deposits.

Ajhil: /* Baseline groundwater quality data in the Chalk of Dorset */

2026-05-08T10:13:26Z

Baseline groundwater quality data in the Chalk of Dorset

← Older revision		Revision as of 11:13, 8 May 2026
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	===Baseline groundwater quality data in the Chalk of Dorset===		===Baseline groundwater quality data in the Chalk of Dorset===
	A summary of the baseline quality of groundwater in the Chalk of Dorset. These data were collected as part of a collaborative project between BGS and the Environment Agency to investigate the [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ baseline quality of groundwater in major UK aquifers]. The [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ UK baseline study results] page provides downloads of all the reports produced by the project.		A summary of the baseline quality of groundwater in the Chalk of Dorset. These data were collected as part of a collaborative project between BGS and the Environment Agency to investigate the [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ baseline quality of groundwater in major UK aquifers]. The [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ UK baseline study results] page provides downloads of all the reports produced by the project.

			[[Image:SouthChalk59DorsetBOX.jpg\|frameless\|center\|500px\|]]

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Ajhil: /* Baseline groundwater quality data in the Chalk of Dorset */

2026-05-08T10:11:29Z

Baseline groundwater quality data in the Chalk of Dorset

← Older revision		Revision as of 11:11, 8 May 2026
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	===Baseline groundwater quality data in the Chalk of Dorset===		===Baseline groundwater quality data in the Chalk of Dorset===
	A summary of the baseline quality of groundwater in the Chalk of Dorset. These data were collected as part of a collaborative project between BGS and the Environment Agency to investigate the baseline quality of groundwater in major UK aquifers. The UK baseline study results page provides downloads of all the reports produced by the project.		A summary of the baseline quality of groundwater in the Chalk of Dorset. These data were collected as part of a collaborative project between BGS and the Environment Agency to investigate the [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ baseline quality of groundwater in major UK aquifers]. The [https://www2.bgs.ac.uk/groundwater/quality/BaselineUK/home.html/ UK baseline study results] page provides downloads of all the reports produced by the project.

	{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"		{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"

Ajhil: /* Baseline groundwater quality data in the Lower Greensand */

2026-05-08T10:10:36Z

Baseline groundwater quality data in the Lower Greensand

← Older revision		Revision as of 11:10, 8 May 2026
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	\|}		\|}
	<~~small~~>Baseline quality data for the Lower Greensand in southern England</~~small~~>		<center>'''Baseline quality data for the Lower Greensand in southern England'''</center>

	The groundwater in the Lower Greensand is fresher than water from most other aquifers in the UK, mainly due to the relative purity of the sands and often short residence times. The low salinities of groundwater even in the deep confined parts of the aquifer show that it has been well flushed of any older water. Where the aquifer is confined, the groundwaters are more reducing and have higher iron concentrations.		The groundwater in the Lower Greensand is fresher than water from most other aquifers in the UK, mainly due to the relative purity of the sands and often short residence times. The low salinities of groundwater even in the deep confined parts of the aquifer show that it has been well flushed of any older water. Where the aquifer is confined, the groundwaters are more reducing and have higher iron concentrations.