Lancashire and Cheshire Basin summary results - Revision history

Dbk: /* Baseline groundwater quality data in the Permo-Triassic sandstone in Manchester */

2026-04-10T14:49:36Z

Baseline groundwater quality data in the Permo-Triassic sandstone in Manchester

← Older revision		Revision as of 15:49, 10 April 2026
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	\| '''Area'''		\| '''Area'''
	\| '''Concentrations (mg/l)'''		\| colspan="3" \| '''Concentrations (mg/l)'''
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	\| '''Number of samples'''		\| '''Number of samples'''
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Dbk: /* Baseline groundwater quality data in the Permo-Triassic sandstone of Cheshire */

2026-04-10T14:49:26Z

Baseline groundwater quality data in the Permo-Triassic sandstone of Cheshire

← Older revision		Revision as of 15:49, 10 April 2026
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	\| '''Area'''		\| '''Area'''
	\| '''Concentrations (mg/l)'''		\| colspan="3" \| '''Concentrations (mg/l)'''
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	\| '''Number of samples'''		\| '''Number of samples'''
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Dbk: /* Methane in UK groundwater results */

2026-04-10T14:49:16Z

Methane in UK groundwater results

← Older revision		Revision as of 15:49, 10 April 2026
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	\| '''Area'''		\| '''Area'''
	\| '''Concentrations (mg/l)'''		\| colspan="3" \| '''Concentrations (mg/l)'''
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	\| '''Number of samples'''		\| '''Number of samples'''
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Dbk at 08:22, 10 April 2026

2026-04-10T08:22:55Z

← Older revision		Revision as of 09:22, 10 April 2026
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	===Contact===		===Contact===
	Please contact BGS Enquiries for more information.		Please contact BGS Enquiries for more information.
	[[category:~~Groundwater and shale gas~~]]		[[category:National methane baseline survey of UK groundwater‎ ]]

Dbk: /* Baseline groundwater quality data in the Permo-Triassic sandstone in Manchester */

2026-04-09T15:06:49Z

Baseline groundwater quality data in the Permo-Triassic sandstone in Manchester

← Older revision		Revision as of 16:06, 9 April 2026
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	\|666		\|666
	\|90		\|90
	Z-		\|-
	\|HCO<sub>3</sub>		\|HCO<sub>3</sub>
	\|40		\|40

Dbk at 15:06, 9 April 2026

2026-04-09T15:06:05Z

← Older revision		Revision as of 16:06, 9 April 2026
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	{{Underconstruction]]		{{Underconstruction}}
	==Lancashire and Cheshire Basins==		==Lancashire and Cheshire Basins==
	===Regional summary===		===Regional summary===

Dbk: /* Baseline groundwater quality data in the Permo-Triassic sandstone in Manchester */

2026-04-09T15:05:50Z

Baseline groundwater quality data in the Permo-Triassic sandstone in Manchester

@@ Line 147: / Line 147: @@
 A summary of the baseline quality of groundwater in Permo-Triassic sandstone in Manchester is presented 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.
-Box and whiskers plot
+{|class="wikitable" style="background-color:#F0F8FF; margin:auto;"
-Area	Concentration (mg/l)	Number of
+|-
-samples
+| '''Area'''
-Minimum	Median	Maximum
+| '''Concentrations (mg/l)'''
 Ca	12	86.2	350	90
 Mg	2.5	26.8	122	90
-Na	8.4	133	3360	90
+| '''Number of samples'''
-K	0.99	4.85	30	90
+|-
 Cl	9	185	5400	88
-SO4	<5	82.9	666	90
+| '''Minimum'''
-HCO3	40	316	1310	89
+| '''Median'''
-NO3.N	<0.003	1.61	33.4	90
+| '''Maximum'''
-Fe	<5	1050	9600	85
 <small>Baseline quality data for the Permo-Triassic sandstone in Manchester</small>
-The groundwaters of the Permo-Triassic aquifer of Manchester display a wide range of chemical characteristics with concentrations for most elements varying over several orders of magnitude. These characteristics are determined largely by natural reactions between the groundwater and the rocks through which it passes. This baseline has been modified by diffuse pollutants including agricultural fertilisers leading locally to high nitrate (NO3.N) and increases in other major elements such as potassium (K), sodium (Na) and sulphate (SO4). Most chemical parameters are highly variable due to the complex geology and the presence of drift deposits, which differ in thickness and type. These drift deposits have a significant effect on recharge of the aquifer but provide a degree of protection from diffuse or point source pollution.
 ===Contact===
 Please contact BGS Enquiries for more information.
 [[category:Groundwater and shale gas]]

Dbk: /* Baseline groundwater quality data in the Permo-Triassic sandstone of Cheshire */

2026-04-09T15:02:11Z

Baseline groundwater quality data in the Permo-Triassic sandstone of Cheshire

← Older revision		Revision as of 16:02, 9 April 2026
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	<small>Baseline quality data for the Permo-Triassic sandstone in Cheshire</small>		<small>Baseline quality data for the Permo-Triassic sandstone in Cheshire</small>

	The quality of groundwater in the Permo-Triassic sandstone is determined by natural reactions between rainwater and the bedrock, which creates a variable baseline. Chemical reactions take place during recharge, the most important being mineral dissolution and precipitation. The baseline in Lancashire and Cheshire has been modified by diffuse pollution including agricultural fertilisers, which has led to locally high levels of nitrate (~~NO3~~.N), potassium (K) and sodium (Na). Along the Mersey estuary, the ingress of saline water also has an impact on groundwater chemistry.		The quality of groundwater in the Permo-Triassic sandstone is determined by natural reactions between rainwater and the bedrock, which creates a variable baseline. Chemical reactions take place during recharge, the most important being mineral dissolution and precipitation. The baseline in Lancashire and Cheshire has been modified by diffuse pollution including agricultural fertilisers, which has led to locally high levels of nitrate (NO<sub>3</sub>.N), potassium (K) and sodium (Na). Along the Mersey estuary, the ingress of saline water also has an impact on groundwater chemistry.

	===Baseline groundwater quality data in the Permo-Triassic sandstone in Manchester===		===Baseline groundwater quality data in the Permo-Triassic sandstone in Manchester===

Dbk: /* Baseline groundwater quality data in the Permo-Triassic sandstone of Cheshire */

2026-04-09T15:01:40Z

Baseline groundwater quality data in the Permo-Triassic sandstone of Cheshire

← Older revision		Revision as of 16:01, 9 April 2026
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	<small>Baseline quality data for the Permo-Triassic sandstone in Cheshire</small>		<small>Baseline quality data for the Permo-Triassic sandstone in Cheshire</small>

	The quality of groundwater in the Permo-Triassic sandstone is determined by natural reactions between rainwater and the bedrock, which creates a variable baseline. Chemical reactions take place during recharge, the most important being mineral dissolution and precipitation. The baseline in Lancashire and Cheshire has been modified by diffuse pollution including agricultural fertilisers, which has led to locally high levels of nitrate (NO3.N), potassium (K) and sodium (Na). Along the Mersey estuary, the ingress of saline water also has an impact on groundwater chemistry.		The quality of groundwater in the Permo-Triassic sandstone is determined by natural reactions between rainwater and the bedrock, which creates a variable baseline. Chemical reactions take place during recharge, the most important being mineral dissolution and precipitation. The baseline in Lancashire and Cheshire has been modified by diffuse pollution including agricultural fertilisers, which has led to locally high levels of nitrate (NO3.N), potassium (K) and sodium (Na). Along the Mersey estuary, the ingress of saline water also has an impact on groundwater chemistry.

Dbk: /* Baseline groundwater quality data in the Permo-Triassic sandstone of Cheshire */

2026-04-09T15:01:23Z

Baseline groundwater quality data in the Permo-Triassic sandstone of Cheshire

@@ Line 77: / Line 77: @@
 A summary of the baseline quality of groundwater in the Permo-Triassic sandstone of Cheshire 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.
-Area	Concentration (mg/l)	Number of
+{|class="wikitable" style="background-color:#F0F8FF; margin:auto;"
-samples
+|-
-Minimum	Median	Maximum
+| '''Area'''
-Ca	4.4	74	795	239
+| '''Concentrations (mg/l)'''
 Mg	<1	21	562	239
 Na	4	31	5600	243
-K	0.25	3.75	136	242
+| '''Number of samples'''
-Cl	7	49	10000	244
+|-
-SO4	<4	49	1780	240
-HCO3	142	218	338	23
+| '''Minimum'''
-NO3.N	<0.05	3.3	37.5	246
+| '''Median'''
 <small>Baseline quality data for the Permo-Triassic sandstone in Cheshire</small>
 The quality of groundwater in the Permo-Triassic sandstone is determined by natural reactions between rainwater and the bedrock, which creates a variable baseline. Chemical reactions take place during recharge, the most important being mineral dissolution and precipitation. The baseline in Lancashire and Cheshire has been modified by diffuse pollution including agricultural fertilisers, which has led to locally high levels of nitrate (NO3.N), potassium (K) and sodium (Na). Along the Mersey estuary, the ingress of saline water also has an impact on groundwater chemistry.
 ===Baseline groundwater quality data in the Permo-Triassic sandstone in Manchester===