Water Framework Directive
Groundwater Monitoring Programme
Site Information
Enniscorthy WS (Kilagoley BH)
ImagePath1: Enniscorthy
WS\IE_SE_G_071_26_005_A_(8
00_x_600).jpg
Enniscorthy WS (Kilagoley BH) is a borehole used as part of a public
water supply. The abstraction rate is 600 m³/day.
August 2011
Wexford
SITE INFORMATION
Site Name:
Enniscorthy WS (Kilagoley BH)
County:
Wexford
RBD:
SERBD
EU Reporting Code:
IE_SE_G_063_26_005
Easting:
298419
GWB Name:
EnniscorthyTown_1
Northing:
139328
GWB Code:
IE_SE_G_063
Site Use:
Drinking Water (PWS)
Drinking Water Code:
Hydrometric Area:
12
Water Level
Monitoring Network:
Townland:
DRUMGOLD
Ownership:
Wexford County Council
Surveillance
Water Quality
Monitoring Network:
Operational (Point)
N
3300PUB1304
Level
Flow
N
N
Operational (Diffuse)
N
Y
Enniscorthy WS is a borehole situated in Ordovician Volcanics and is used as a public water supply. The borehole is
included in the operational chemical network.
Site Comments:
SITE DIRECTIONS
Location and Access
Information:
Located to the southeast of Enniscorthy, the site is on the Kilagoley Road.
Additional Comments: ---
WELL INFORMATION
Monitoring Point Type:
BH
Abstraction Rate (m³/d):
600
Ground Elevation (m OD):
55
Borehole Log Available:
---
Total Drilled Depth (m bgl):
---
Depth to Bedrock (m bgl):
---
---
Upper Casing Diameter
(mm):
---
Lower Casing Diameter
(mm):
---
Final Borehole Depth (m):
---
Upper Casing Bottom
Depth (m bgl) :
---
Lower Casing Bottom
Depth (m bgl):
---
Screen Interval (m bgl):
---
Screen Type
(PVC,Steel,other):
---
Screen Slot Size (mm):
---
Grout Type
(cement,bentonite):
---
Grouted above (m bgl):
---
Grout Volume Injected
(m³):
Gravel Pack Interval (m
bgl):
---
Gravel Pack Volume (m³):
---
Open Hole Interval (m
bgl):
Potential Yield (m³/day):
---
Specific Capacity
(m³/d/m):
---
Static Water Level (m bgl):
---
Scheme Name:
Enniscorthy
Top of Casing (m agl):
Source Report Info:
Scheme Summary:
---
---
---
Comments on Monitoring
Site:
Number of Abstraction
Points in the Scheme:
2
Source Report
Available
N
---
The scheme consists of two boreholes at two sites and a surface water intake to supply 4200 m³/d to Enniscorthy and the
surrounding areas. The Kilagoley BH at the Enniscorthy site is abstracting 600 m³/d, the BH at Edermine is supplying 600
m³/d and the surface water intake provides 3000 m³/d. A 2010 source report has been prepared for the Edermine site.
The sample point is at the pumphouse.
Page 2 of 5
HYDROGEOLOGY
GEOLOGY
HYDROGEOLOGY
Soil:
Made/Built land (Made)
Subsoil:
n.a. (Made)
Bedrock:
Ordovician Volcanics
Estimated
ZOC Size
(km²):
ZONE OF
CONTRIBUTION
ZOC
Delineation
Comments:
Groundwater
Vulnerability within
ZOC (% area):
Rf
Vulnerability
at Monitoring
site:
1.05
ZOC
Delineated By:
Aquifer
Category:
Subsoil
Permeability:
Moderate
High to Low
Flow Regime:
Productive
fissured
bedrock
OCM (DC)
Recharge Est
Recharge
(mm/yr):
Estimate
(mm/yr):
242
The ZOC was delineated based on abstraction rate, topography and recharge. The ZOC includes the entire
hydrological catchment. There is expected to be increased flow along the fault in the eastern part of the ZOC.
Extreme (X)
Extreme (E)
High
Moderate
Low
High to Low
Unclassified
26.22
13.96
0
0
0
59.82
0
HYDROCHEMISTRY
Hydrochemical
Signature:
Alkalinity (mg/l HCO3):
Hardness (mg/l
CaCO3):
Conductivity (uS/cm):
Ca-HCO3
Average:
Range:
111
94-150
Average:
Range:
161
140-212
Average:
Range:
409
351-466
Monitoring Record
Period:
Additional
Water
Chemistry
Information:
From:
To:
2007
2010
During the monitoring period: The average nitrate
concentration was 48 mg/l NO3 and the maximum nitrate
concentration was 60 mg/l NO3. The average ammonium
concentration was 0.023 mg/l N and the maximum
ammonium concentration was 0.076 mg/l N. The average
molybdate reductive phosphorus (MRP) concentration was
0.019 mg/l P and the maximum MRP concentration was 0.03
mg/l P. The average chloride concentration was 27 mg/l Cl
and the maximum chloride concentration was 29 mg/l Cl.
RISK ASSESSMENT
Pressure (e.g., Nitrates,
Phosphates, Abstractions):
Diffuse & Point
Typical Contaminants:
Nitrates & Contaminated Land
Risk Category:
At risk, high confidence
GWB Status:
Good
Impact Potential within ZOC (%
area):
Extreme:
High:
Moderate:
Low:
Negligible:
0.00
76.66
0.00
0.00
23.34
OTHER INFORMATION
---
Page 3 of 5
Sampling Point
Page 4 of 5
Data Summary Sheet - July 2011
Disclaimer: The data in this document are based on the best available information and understanding at time of writing. Neither
the Environmental Protection Agency, nor the individual bodies supplying data for this document and accompanying maps will
be responsible for any loss or damage from the use or interpretation of these data.
Rock Unit Geology Map: GSI, 2009
Aquifer Type Map: GSI, 2009
Groundwater Vulnerability Map: GSI, 2009
Soils & Subsoils Type: Teagasc, 2007
Recharge Map: GSI, 2009
Impact Potential Map: EPA, 2009
Risk Assessment Map: EPA WFD Risk Assessment, 2006
Groundwater Body Status: EPA WFD Status Assessment, 2008
Water Quality Data: EPA WFD Monitoring, 2008
Groundwater Threshold Values
Groundwater threshold values for selected parameters:
Nitrate - General Chemical Test/ Drinking Water Test (37.5 mg/I N03)
Ammonium - Drinking Water Test (0.175 mg/I N) / Surface Water Test (0.065 mg/l N)
Molybdate Reactive Phosphorus (MRP) - Surface Water Test (0.035 mg/I P)
Chloride -Saline/Intrusive Test (24 mg/I) / Drinking Water Test (175 mg/I Cl)
Electrical Conductivity -Saline/Intrusive Test (800 µS/cm) / Drinking Water Test (1,875 µS/cm)
Further information on groundwater threshold values is contained in the Groundwater Regulations (S.I. No.9 of 2010).
General Downgradient Distances
General Downgradient Distances (XL) applied to boreholes sourced in bedrock aquifers are constrained to estimate approximate
limits based on data at the GSl. ln some cases they may be higher or lower depending on local conditions.
Rk, Rkd, Lk
225 m
Lm
150 m
Ll, PI
60 m
It is assumed that groundwater downgradient of a spring cannot flow back up to the spring, however a precautionary 30m buffer
is generally applied which allows for instances where pumping under dry weather periods may induce a drawdown or where the
ground may be sloping toward the spring from the downgradient side.
Version 0:
Prepared by
Date:
Version 1:
Prepared by OCM (DC)
Date:
Version 2:
Prepared by
Date:
Version 3:
Prepared by
Date:
Version 4:
Prepared by
Date:
Feb 2011
Page 5 of 5
297500
298000
298500
299000
299500
300000
300500
139500
²
140000
297000
3300PUB1304 / IE_SE_G_063_26_005
139000
Slan
ey
!
.
Kildare
Laois
Wicklow
Urrin
Carlow
)
"
Wexford
Waterford
Location Map for Enniscorthy WS
!
.
Abstractions
River
Zone of Contribution
© Ordnance Survey Ireland. All rights reserved.
Licence number EN0059208
0
0.25
0.5
1
km
138500
Kilkenny
297500
298000
298500
299000
299500
300000
300500
²
Rf
Rf
Rf
140000
297000
139500
Rf
Rf
Slan
ey
3300PUB1304 / IE_SE_G_063_26_005
139000
Rf
Rf
Urrin
Kildare
Laois
Wicklow
Carlow
)
"
Rf
Wexford
Rf
Rf
Pl
Waterford
Aquifer Category Map for Enniscorthy WS
!
.
Abstractions
Pl
Zone of Contribution
Rf
River
Fault
© Ordnance Survey Ireland. All rights reserved.
Licence number EN0059208
0
0.25
0.5
1
km
138500
Kilkenny
297500
298000
298500
299000
299500
300000
300500
139500
²
140000
297000
139000
Slan
ey
3300PUB1304 / IE_SE_G_063_26_005
Kildare
Laois
Wicklow
Urrin
Carlow
Kilkenny
138500
)
"
Wexford
Waterford
© Ordnance Survey Ireland. All rights reserved.
Licence number EN0059208
Bedrock Map for Enniscorthy WS
!
.
Abstractions
Granites & other Igneous Intrusive rocks
Zone of Contribution
Ordovician Metasediments
River
Ordovician Volcanics
Fault
0
0.25
0.5
1
km
297500
298000
298500
299000
299500
300000
300500
139500
²
140000
297000
139000
Slan
ey
3300PUB1304 / IE_SE_G_063_26_005
Kildare
Laois
Wicklow
Urrin
Carlow
)
"
Wexford
Waterford
Groundwater Vulnerability Map for Enniscorthy WS
!
.
Abstractions
E (Rock near surface or Karst)
M (Moderate)
Water
Zone of Contribution
E (Extreme)
L (Low)
No Data
River
H (High)
HL (unmapped - High to Low)
© Ordnance Survey Ireland. All rights reserved.
Licence number EN0059208
0
0.25
0.5
1
km
138500
Kilkenny
297500
298000
298500
299000
299500
300000
300500
139500
²
140000
297000
139000
Slan
ey
3300PUB1304 / IE_SE_G_063_26_005
Kildare
Laois
Wicklow
Urrin
Carlow
)
"
Wexford
Waterford
Subsoils Map for Enniscorthy WS
!
.
Abstractions
Alluvium
Lacustrine sediments
River
Gravels derived from Lower Palaeozoic sandstones and shales
Made ground
Zone of Contribution
Bedrock outcrop or subcrop
Till derived from Lower Palaeozoic shales
© Ordnance Survey Ireland. All rights reserved.
Licence number EN0059208
Water
0
0.25
0.5
1
km
138500
Kilkenny
297500
298000
298500
299000
299500
300000
300500
139500
²
140000
297000
139000
Slan
ey
3300PUB1304 / IE_SE_G_063_26_005
Laois
Kildare
Wicklow
Urrin
Carlow
Kilkenny
138500
)
"
Wexford
Waterford
Soils Map for Enniscorthy WS
!
.
Abstractions
Acid Deep Well Drained Mineral
Acid Shallow Poorly Drained Mineral
Made
River
Acid Deep Poorly Drained Mineral
Mineral Alluvium
Water
Zone of Contribution
Acid Shallow Well Drained Mineral
Lacustrine
© Ordnance Survey Ireland. All rights reserved.
Licence number EN0059208
0
0.25
0.5
1
km