South Wales summary results - Revision history

Ajhil at 11:42, 21 October 2026

2026-10-21T11:42:16Z

← Older revision		Revision as of 11:42, 21 October 2026
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	[[Image:SouthWalesGeology_v2.jpg\|frameless\|center\|700px\|]]		[[Image:SouthWalesGeology_v2.jpg\|frameless\|center\|700px\|]]
	<center>'''Geology of South Wales'''</center>		<center>'''Geology of South Wales'''</center>
			<br>
	* In the UK, the Carboniferous limestone is a principal aquifer and groundwater flows rapidly through a network of fractures, conduits and caves. In South Wales, this aquifer is not used for public supply, although it provides many private supplies. The Carboniferous limestone outcrops south of the coalfield and has a maximum thickness of 425 m.		* In the UK, the Carboniferous limestone is a principal aquifer and groundwater flows rapidly through a network of fractures, conduits and caves. In South Wales, this aquifer is not used for public supply, although it provides many private supplies. The Carboniferous limestone outcrops south of the coalfield and has a maximum thickness of 425 m.
	* The Coal Measures sandstones in South Wales are very hard and dense, and groundwater will only tend to flow through fractures. Due to mining subsidence, there are zones of increased fracturing, and therefore increased water storage and flow. This aquifer is classed as a secondary A aquifer by the Environment Agency and is not used for public water supply.		* The Coal Measures sandstones in South Wales are very hard and dense, and groundwater will only tend to flow through fractures. Due to mining subsidence, there are zones of increased fracturing, and therefore increased water storage and flow. This aquifer is classed as a secondary A aquifer by the Environment Agency and is not used for public water supply.

Ajhil: /* Regional summary */

2026-10-21T11:42:05Z

Regional summary

← Older revision		Revision as of 11:42, 21 October 2026
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	[[Image:SouthWalesGeology_v2.jpg\|frameless\|center\|700px\|]]		[[Image:SouthWalesGeology_v2.jpg\|frameless\|center\|700px\|]]
	<center>'''Geology of South Wales'''</center>		<center>'''Geology of South Wales'''</center>


	* In the UK, the Carboniferous limestone is a principal aquifer and groundwater flows rapidly through a network of fractures, conduits and caves. In South Wales, this aquifer is not used for public supply, although it provides many private supplies. The Carboniferous limestone outcrops south of the coalfield and has a maximum thickness of 425 m.		* In the UK, the Carboniferous limestone is a principal aquifer and groundwater flows rapidly through a network of fractures, conduits and caves. In South Wales, this aquifer is not used for public supply, although it provides many private supplies. The Carboniferous limestone outcrops south of the coalfield and has a maximum thickness of 425 m.

Ajhil at 11:41, 21 October 2026

2026-10-21T11:41:58Z

← Older revision		Revision as of 11:41, 21 October 2026
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	[[Image:SouthWalesGeology_v2.jpg\|frameless\|center\|700px\|]]		[[Image:SouthWalesGeology_v2.jpg\|frameless\|center\|700px\|]]
	<center>'''Geology of South Wales'''</center>		<center>'''Geology of South Wales'''</center>


	* In the UK, the Carboniferous limestone is a principal aquifer and groundwater flows rapidly through a network of fractures, conduits and caves. In South Wales, this aquifer is not used for public supply, although it provides many private supplies. The Carboniferous limestone outcrops south of the coalfield and has a maximum thickness of 425 m.		* In the UK, the Carboniferous limestone is a principal aquifer and groundwater flows rapidly through a network of fractures, conduits and caves. In South Wales, this aquifer is not used for public supply, although it provides many private supplies. The Carboniferous limestone outcrops south of the coalfield and has a maximum thickness of 425 m.

Ajhil: /* Methane in UK groundwater results */

2026-06-05T09:11:05Z

Methane in UK groundwater results

← Older revision		Revision as of 09:11, 5 June 2026
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	<center>'''Methane samples and concentrations in South Wales'''</center>		<center>'''Methane samples and concentrations in South Wales'''</center>
	<small><center>Note: values less than the analytical detection limit have been converted to half the detection limit<br>~~for~~ the purposes of this statistical summary and graph, but the relevant detection limit is quoted in the table above.</~~small~~></~~center~~>		<small><center>Note: values less than the analytical detection limit have been converted to half the detection limit for<br>the purposes of this statistical summary and graph, but the relevant detection limit is quoted in the table above.</center></small>

	===Baseline groundwater quality data===		===Baseline groundwater quality data===

Ajhil: /* Methane in UK groundwater results */

2026-06-05T09:09:40Z

Methane in UK groundwater results

← Older revision		Revision as of 09:09, 5 June 2026
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	\|}		\|}

	<center>'''Methane samples and concentrations in South Wales'''<br>		<center>'''Methane samples and concentrations in South Wales'''</center>
	<small>Note: values less than the analytical detection limit have been converted to half the detection limit<br>for the purposes of this statistical summary and graph, but the relevant detection limit is quoted in the table above.</small></center>		<small><center>Note: values less than the analytical detection limit have been converted to half the detection limit<br>for the purposes of this statistical summary and graph, but the relevant detection limit is quoted in the table above.</small></center>

	===Baseline groundwater quality data===		===Baseline groundwater quality data===

Ajhil: /* Methane in UK groundwater results */

2026-06-05T08:51:53Z

Methane in UK groundwater results

← Older revision		Revision as of 08:51, 5 June 2026
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	{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"		{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"
	\| rowspan="2" scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Area'''</span>		\| rowspan="2" scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Area'''</span>
	\| colspan="3" scope="col" style="width: 50px; background-color: #042e3f;" \| <span style="color:#ffffff">'''Concentration (mg/l)'''		\| colspan="3" scope="col" style="width: 50px; background-color: #042e3f;" \| <span style="color:#ffffff"><center>'''Concentration (mg/l)'''</center>
	\| rowspan="2" scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Number of Samples'''</span>		\| rowspan="2" scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Number of Samples'''</span>
	\|-		\|-

Ajhil: /* Methane in UK groundwater results */

2026-06-03T13:13:01Z

Methane in UK groundwater results

← Older revision		Revision as of 13:13, 3 June 2026
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	\| ! scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Maximum'''		\| ! scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Maximum'''
	\|-		\|-
	\| '''South Wales'''		\| ! scope="col" style="width: 200px;" \| '''South Wales'''
	\| '''<0.0001'''		\| ! scope="col" style="width: 100px;" \| '''<0.0001'''
	\| '''0.032'''		\| ! scope="col" style="width: 100px;" \| '''0.032'''
	\| '''0.483'''		\| ! scope="col" style="width: 100px;" \| '''0.483'''
	\| '''25'''		\| ! scope="col" style="width: 100px;" \| '''25'''
	\|-		\|-
	\| ''Carboniferous limestone''		\| ''Carboniferous limestone''

Ajhil: /* Methane in UK groundwater results */

2026-06-03T11:36:06Z

Methane in UK groundwater results

← Older revision		Revision as of 11:36, 3 June 2026
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	{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"		{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"
	\| ! scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Area'''</span>		\| rowspan="2" scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Area'''</span>
	\| colspan="3" scope="col" style="width: 50px; background-color: #042e3f;" \| <span style="color:#ffffff">'''Concentration (mg/l)'''		\| colspan="3" scope="col" style="width: 50px; background-color: #042e3f;" \| <span style="color:#ffffff">'''Concentration (mg/l)'''
	\| ! scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Number of Samples'''</span>		\| rowspan="2" scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Number of Samples'''</span>
	\|-		\|-
	\|		\| ! scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Minimum'''
	\| '''Minimum'''		\| ! scope="col" style="width: 50px; background-color: #042e3f;" \| <span style="color:#ffffff">'''Median'''
	\| '''Median'''		\| ! scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Maximum'''
	\| '''Maximum'''
	\|
	\|-		\|-
	\| '''South Wales'''		\| '''South Wales'''
	\| <0.0001		\| '''<0.0001'''
	\| 0.032		\| '''0.032'''
	\| 0.483		\| '''0.483'''
	\| 25		\| '''25'''
	\|-		\|-
	\| ''Carboniferous limestone''		\| ''Carboniferous limestone''

Ajhil: /* Regional summary */

2026-06-03T11:14:02Z

Regional summary

← Older revision		Revision as of 11:14, 3 June 2026
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	===Regional summary===		===Regional summary===
	In South Wales, 25 sites have been sampled for methane in the two main aquifers, the Carboniferous limestone and the Coal Measures sandstones.		In South Wales, 25 sites have been sampled for methane in the two main aquifers, the Carboniferous limestone and the Coal Measures sandstones.
			<br>
	[[Image:SouthWalesGeology_v2.jpg\|frameless\|center\|700px\|]]		[[Image:SouthWalesGeology_v2.jpg\|frameless\|center\|700px\|]]

	<center>'''Geology of South Wales'''</center>		<center>'''Geology of South Wales'''</center>

Ajhil: /* Methane in UK groundwater results */

2026-06-03T11:12:09Z

Methane in UK groundwater results

← Older revision		Revision as of 11:12, 3 June 2026
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	<center>		<center>
	<div><ul>		<div><ul>
	<li style="display: inline-block;"> [[File:MethaneSamplesSouthWales.jpg\|frameless\|left\|~~450px~~]]</li>		<li style="display: inline-block;"> [[File:MethaneSamplesSouthWales.jpg\|frameless\|left\|470px]]</li>
	<li style="display: inline-block;"> [[File:MethaneChart.jpg\|frameless\|right\|~~490px~~]]</li>		<li style="display: inline-block;"> [[File:MethaneChart.jpg\|frameless\|right\|510px]]</li>
	</ul></div>		</ul></div>
	</center>		</center>

← Older revision		Revision as of 08:51, 5 June 2026
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	{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"		{\|class="wikitable" style="background-color:#F0F8FF; margin:auto;"
	\| rowspan="2" scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Area'''</span>		\| rowspan="2" scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Area'''</span>
	\| colspan="3" scope="col" style="width: 50px; background-color: #042e3f;" \| <span style="color:#ffffff">'''Concentration (mg/l)'''		\| colspan="3" scope="col" style="width: 50px; background-color: #042e3f;" \| <span style="color:#ffffff"><center>'''Concentration (mg/l)'''</center>
	\| rowspan="2" scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Number of Samples'''</span>		\| rowspan="2" scope="col" style="width: 100px;" style="background-color: #042e3f;" \| <span style="color:#ffffff">'''Number of Samples'''</span>
	\|-		\|-