East Midlands summary results - Revision history

Dbk at 08:22, 10 April 2026

2026-04-10T08:22:02Z

← 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 Chalk */

2026-04-09T14:47:25Z

Baseline groundwater quality data in the Chalk

← Older revision		Revision as of 15:47, 9 April 2026
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	\| 464		\| 464
	\|148		\|148
	\|_		\|-
	\|NO<sub>3</sub>.N		\|NO<sub>3</sub>.N
	\| <0.2		\| <0.2

Dbk: /* Baseline groundwater quality data in the Chalk */

2026-04-09T14:46:48Z

Baseline groundwater quality data in the Chalk

@@ Line 146: / Line 146: @@
 A summary of the baseline quality of groundwater in the Chalk 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.
-Box and whiskers plot
+{|class="wikitable" style="background-color:#F0F8FF; margin:auto;"
-Analysis	Concentration (mg/l)	Number of
+| '''Analysis'''
-samples
+| '''Concentration (mg/l)'''
 Minimum	Median	Maximum
 Ca	60.8	105	252	149
-Mg	0.83	3.43	626	149
+|'''Number of samples'''
-Na	4.7	11.8	4910	149
+|-
 K	0.26	1.42	155	148
-Cl	11.2	27.9	8890	149
+| '''Minimum'''
-SO4	<5	29.7	1290	149
+| '''Median'''
-HCO3	120	241	464	148
+| '''Maximum'''
-NO3.N	<0.2	8.01	33.2	148
 <small>Baseline quality data for the Chalk in the Midlands</small>

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

2026-04-09T14:42:07Z

Baseline groundwater quality data in the Permo-Triassic sandstone

← Older revision		Revision as of 15:42, 9 April 2026
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	\|}		\|}

	The quality of groundwater in the Permo-Triassics sandstone is determined by natural reactions between rainwater and the bedrock, which creates a variable baseline. Nitrate (~~NO3~~.N) and chloride (Cl) are elevated due to agricultural and industrial practices, and the groundwater can have a higher salinity in the confined part of the aquifer.		The quality of groundwater in the Permo-Triassics sandstone is determined by natural reactions between rainwater and the bedrock, which creates a variable baseline. Nitrate (NO<sub>3</sub>.N) and chloride (Cl) are elevated due to agricultural and industrial practices, and the groundwater can have a higher salinity in the confined part of the aquifer.

	===Baseline groundwater quality data in the Lincolnshire Limestone===		===Baseline groundwater quality data in the Lincolnshire Limestone===

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

2026-04-09T14:41:24Z

Baseline groundwater quality data in the Permo-Triassic sandstone

@@ Line 59: / Line 59: @@
 A summary of the baseline quality of groundwater in the Permo-Triassic sandstone 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.
-Box and whiskers plot
+{|class="wikitable" style="background-color:#F0F8FF; margin:auto;"
-Analysis	Concentration (mg/l)	Number of
+| '''Analysis'''
-samples
+| '''Concentration (mg/l)'''
 Minimum	Median	Maximum
 Ca	55.3	140	556	43
-Mg	20.6	34.7	133	43
+|'''Number of samples'''
-Na	7	35.3	402	43
+|-
 K	<0.6	4	13.5	43
-Cl	12.5	36.6	307	43
+| '''Minimum'''
-SO4	6.1	170	1760	43
+| '''Median'''
-HCO3	234	333	498	43
+| '''Maximum'''
-NO3.N	<0.0025	0.053	41.1	43
 The quality of groundwater in the Permo-Triassics sandstone is determined by natural reactions between rainwater and the bedrock, which creates a variable baseline. Nitrate (NO3.N) and chloride (Cl) are elevated due to agricultural and industrial practices, and the groundwater can have a higher salinity in the confined part of the aquifer.

Dbk: /* Methane in UK groundwater results */

2026-04-09T14:34:55Z

Methane in UK groundwater results

← Older revision		Revision as of 15:34, 9 April 2026
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	{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"		{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"
	\| Area		\| '''Area'''
	\| Concentration (mg/l)		\| '''Concentration (mg/l)'''
	\|		\|
	\|		\|
	\|Number of samples		\|'''Number of samples'''
	\|-		\|-
	\|		\|
	\| Minimum		\| '''Minimum'''
	\| Median		\| '''Median'''
	\| Maximum		\| '''Maximum'''
	\|		\|
	\|-		\|-

Dbk: /* Methane in UK groundwater results */

2026-04-09T14:34:13Z

Methane in UK groundwater results

← Older revision		Revision as of 15:34, 9 April 2026
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	\| Area		\| Area
	\| Concentration (mg/l)		\| Concentration (mg/l)
	\|
	\|		\|
	\|		\|
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	\|		\|
	\|-		\|-
	\| East Midlands Province		\|East Midlands Province
	\|<0.00005		\|<0.00005
	\|0.0009		\|0.0009
	\|1.32\|93		\|1.32
			\|93
	\|-		\|-
	\| Lincolnshire Limestone		\| Lincolnshire Limestone
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	\| Sherwood Sandstone		\| Sherwood Sandstone
	\|<0.00005		\|<0.00005
	\| 0.0005		\| 0.0005
	\|0.465		\|0.465
	\| 34		\| 34

Dbk: /* Baseline groundwater quality data in the Chalk */

2026-04-09T14:33:23Z

Baseline groundwater quality data in the Chalk

← Older revision		Revision as of 15:33, 9 April 2026
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	NO3.N <0.2 8.01 33.2 148		NO3.N <0.2 8.01 33.2 148

	<small>Baseline quality data for the Chalk in the Midlands<small/>		<small>Baseline quality data for the Chalk in the Midlands</small>

	The quality of groundwater in the Chalk aquifer of Yorkshire and Humberside is very variable due to a number of geochemical processes. The Chalk groundwater is generally hard and the unconfined areas have been impacted by seawater intrusion and human activities, such as pollution from agriculture. Groundwater in the confined and semi-confined sections of the aquifer has some protection from the effects of pollution.		The quality of groundwater in the Chalk aquifer of Yorkshire and Humberside is very variable due to a number of geochemical processes. The Chalk groundwater is generally hard and the unconfined areas have been impacted by seawater intrusion and human activities, such as pollution from agriculture. Groundwater in the confined and semi-confined sections of the aquifer has some protection from the effects of pollution.

Dbk: /* Baseline groundwater quality data in the Lincolnshire Limestone */

2026-04-09T14:33:06Z

Baseline groundwater quality data in the Lincolnshire Limestone

← Older revision		Revision as of 15:33, 9 April 2026
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	NO3.N <0.003 4.7 20.7 37		NO3.N <0.003 4.7 20.7 37

	<small>Baseline quality data for the Lincolnshire Limestone in the Midlands<small/>		<small>Baseline quality data for the Lincolnshire Limestone in the Midlands</small>

	In the Lincolnshire Limestone, the quality of the water varies considerably between the unconfined and confined regions. In the recharge areas, the water is fresh, although impacted by agricultural pollution, whereas the confined groundwaters are old and reducing, and can be of poor quality.		In the Lincolnshire Limestone, the quality of the water varies considerably between the unconfined and confined regions. In the recharge areas, the water is fresh, although impacted by agricultural pollution, whereas the confined groundwaters are old and reducing, and can be of poor quality.

Dbk: /* Methane in UK groundwater results */

2026-04-09T14:32:44Z

Methane in UK groundwater results

← Older revision		Revision as of 15:32, 9 April 2026
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	<small>Methane samples and concentrations in the East Midlands Province.<br>		<small>Methane samples and concentrations in the East Midlands Province.<br>
	Note: values less than the analytical detection limit have been converted to half the detection limit for the purposes of this statistical summary and graph, but the relevant detection limit is quoted in the table above.<small/>		Note: values less than the analytical detection limit have been converted to half the detection limit for the purposes of this statistical summary and graph, but the relevant detection limit is quoted in the table above.</small>

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