Transcript 9. Oliver Fogarty.

Water Services National
Training Group
11th Annual Conference
6th September 2007
WSNTG Annual Conference September 2007
Drinking Water – 2007 Regs
& Crypto Risk Management
Oliver Fogarty
Senior Adviser
DEHLG
WSNTG Annual Conference September 2007
Outline of Presentation
PROTECTION OF PUBLIC HEALTH
 Background to DW Regulations
 ECJ Judgment & Ireland’s Response to
Date
 New Regulations & Summary of Key
Changes

Crypto Risk Management
Background to Regulations
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Surface Water Directive 75/440/EEC
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Drinking Water Directive 80/778/EEC
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S.I. No. 294 of 1989
S.I. No. 81 of 1988
S.I. No. 177 of 2000
S.I. No. 259 of 2003
Drinking Water Directive 98/83/EC
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S.I. No. 439 of 2000
ECJ Proceedings & Decision
Case No C-316/00 that Ireland failed:
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In respect of 850 public WSS (T & F
Coli)
In respect of > 810 GWSS (T & F Coli)
In respect of transposition vis a vis
GWSS
THREAT OF FINES
Response to ECJ
PROTECTION OF PUBLIC HEALTH
 Section 83 of Local Gov Act
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Further amendment of S.I. No. 439 of 2000
Water Services Act (passed May 07)
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Reduces 88 Sanitary Auth. to 34 City & County
Councils
Streamlines water services legislation
Annual WSIP with record funding
EXPENDITURE 1994 - 2007
€600
€500
€400
€300
€200
19
94
19
95
19
96
19
97
19
98
19
99
20
00
20
01
20
02
20
03
20
04
20
05
20
06
20
07
€100
€0
Total €m
WSIP €m
RWP €m
EXPENDITURE 1994 - 2007
19
94
19
95
19
96
19
97
19
98
19
99
20
00
20
01
20
02
20
03
20
04
20
05
20
06
20
07
€160
€140
€120
€100
€80
€60
€40
€20
€0
50
40
30
20
10
0
RWP €m
RWP %
Response to ECJ
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Pilot Source Protection Plan
Manual on TS for single houses (EPA)
REPS and Good Farming Practice
Nitrates Directive/Action Programme
WFD
Drinking Water National Monitoring
NRWMC
Response to ECJ
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Implementation of DBO
Quality Assurance Scheme (GW)
Training & Development (WSNTG)
Ongoing reporting to Cion
Revised Regulations / Urgent
New Regulations
PROTECTION OF PUBLIC HEALTH
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S.I. No. 106 of 2007
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08th March 2007, WSP5/07
Incorporated most modifications
S.I. 278 of 2007
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12th June 2007, WSP6/07, WSP7/07
Indictable offences, revised Fluoride standard
S.I. 278 of 2007 - General
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European Communities (Drinking Water) (No.
2) Regulations 2007
WSP 7/07 (summary)
WSP8/07 (letter to group schemes)
Largely replicates original 2000 Regs
Implementation WG
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DEHLG, EPA, CCMA, NFGWSS, NRWMC,
WSNTG
Guidance from EPA
Key Changes – Supervision
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EPA supervises sanitary authority
supplies
Sanitary authority supervises all other
supplies
Supervisory authority to carry out
periodic audits
Supervisory authority – powers of direct
intervention – cost recovery
Key Changes – Offences
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Failure to comply with directions
Failure to inform SA of incidents
Failure to maintain records
Failure to inform consumers of incidents
Failure to maintain internal plumbing
(where water supplied to public) in safe
condition
Summary and Indictable offences
Key Changes – Supervision
PROTECTION OF PUBLIC HEALTH
 Water Suppliers must comply
 Intervention (where public health risk)
will be subject to agreement with HSE
 Maintain register
 Keep data on monitoring and make
available to public (may be electronic)
Key Changes – Monitoring
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Sanitary (Water Services) Authority
monitors all supplies
Monitoring programmes subject to
approval of EPA
EPA has enforcement powers in respect
of monitoring
Key Changes – Water Suppliers
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Must inform consumer
WS must maintain records of incidents
and general operations and make
available to supervisory authority
Key Changes – Remedial Action
PROTECTION OF PUBLIC HEALTH
 Investigation
 Discovery of non-compliance
 Remedial Action
 Timelines
Drinking Water – 2007 Regs
& Crypto Risk Management
Oliver Fogarty
Senior Adviser
DEHLG
WSNTG Annual Conference September 2007
Crypto – Background
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Circular Letter L7/98
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Protection of Drinking Water Supplies against
contamination from Crypto
Guidelines on reducing risk
Review action plans and training programmes
Good prevention measures
Ensure good liaison with Health Boards and
EPA
Crypto – Risk Assessment
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Crypto (Scottish Water) Directions 2003
NDSC 2004 & EPA Handbook on DW Regs,
Implementation for Sanitary Authorities
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Quantitative scoring system to determine if high,
moderate or low risk
Directions specify frequency of sampling for raw
(catchment risk score + Q)
Directions specify frequency of sampling for
treated (catchment risk score +treatment risk
score + Q)
Risk Assessment - Model
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Quantitative Assessment
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The degree of exposure to oocysts
Agricultural practices
Sewage inputs
Water source type
River and intake management
Water treatment
Treatment works monitoring
Performance and operational factors
Risk Assessment - Model
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Score = N x 0.4 x log10(population)
Range
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Very High
High
Moderate
Low
> 100
76 – 100
50 – 75
< 50
Crypto Incidents
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Incidents linked to Water Supply
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Mullingar
Ennis
Carlow
Roscommon
Portlaw
Galway
Clonmel
Risk Reduction
Risk Reduction – Treatment
Short Term
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Operate plant at its optimum design level
Avoid overloading plant
Avoid bypassing
Deal with UFW & leaks
Risk Reduction – Treatment
Short Term
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Avoid surges in filter operation
Never restart without backwashing
Allow filters to “ripen”
Avoid recycling of backwash when risk is high
Evaluate value of coagulant aids
Install turbidity monitors on each filter
Generic Monitors
Risk Reduction – Treatment
Short Term
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Ensure coagulant (dose, brand, type etc) are
optimal
Optimise pH for coagulation
Evaluate use of flocculant aids
Ensure adequate mixing
Check sludge bleeds regularly
Minimise sludge blanket disturbance by flow
variation or wind effects
Backwash filters as frequently as possible
Risk Reduction – Treatment
Short Term
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Ensure adequate depth of media
If possible run filters to waste on start up
Strive for lowest possible levels of turbidity
Monitor filter headloss
For rapid filters consider use of polyelectrolyte
as conditioner
Do not use backwash or process water without
special treatment. Flush mains regularly
Inspect and clean reservoirs – repair defects
Risk Reduction – Catchment
Medium to Long Term
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Catchment management plans – grazing
(monthly inspections)
Nitrates Action programme
REPS
WFD
Management of slaughtering/meat processing
plants upstream
EPA guidance for single houses
Ensure integrity of Borehole linings
Risk Reduction – Conclusion
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Treatment Plant
Catchment
Low Cost
Water Services National
Training Group
11th Annual Conference
6th September 2007
WSNTG Annual Conference September 2007