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Contaminant Candidate Contaminant Candidate List (CCL) Regulatory List (CCL) Regulatory
DeterminationsDeterminations
Water Quality Training Roundtable 2000February 7, 2000
2
SDWA History
1974: Establish basic program and National Primary Drinking Water Regulations
1986: Accelerate pace of drinking water standards; 83 by 1989 and 25 every 3 years
1996: Risk based priority setting• Target contaminants posing greatest threat
• Emphasis on sound science and data collection
3
Our mandates - SDWA Statutes: Regulation Determination 1412(b)(1)(B)(ii)
• Not later than 5 years after the date of enactment (by Aug 6, 2001) and every five years thereafter.
• For not fewer than 5 contaminants.
• After notice of the preliminary determination and opportunity for public comment.
• A determination not to regulate a contaminant shall be considered final agency action and subject to judicial review.
4
Our mandates - SDWA Statutes: Regulation, Health Advisories and Other Actions 1412(b)(1)(E)
• Propose MCLGs and NPDWRs no later that 24 months after the determination to regulate and may publish them concurrently.
• Publish MCLGs and promulgate NPDWRs within 18 months after the proposal thereof, and may extend the deadline for such promulgation for up to 9 months.
• Publish health advisories (which are not regulations) or take other appropriate actions for contaminants not subject to any NPDWRs.
5
Developing the CCL
• 1996 SDWA - establish a list of contaminants to aid in priority setting for Agency’s drinking water program
• Consultation with stakeholders and National Drinking Water Advisory Council
• Public water utilities, environmental and public interest groups, state regulatory agencies, public health offices
6
How Were Contaminants Identified?
260 ChemicalContaminants
260 ChemicalContaminants
Present in water at levels of public
health concern
Present in water at levels of public
health concern
Yes
No
Presence likely Production
Release Persistence Mobility
Presence likely Production
Release Persistence Mobility
Yes
No
Relative Health
Risk
High
Low
Include on the CCL
50 Chemical10 Microbes
Include on the CCL
50 Chemical10 Microbes
~25 Microbes~25 Microbes
Expert PanelPublic Comment
Expert PanelPublic Comment
7
When was CCL Finalized?
• Draft CCL in October 1997 for public comment• 71 contaminants: 13 microbes, 58 chemicals
• 71 comments
• Final CCL in March 1998• 60 contaminants: 10 microbes, 50 chemicals
8
CCL Purpose
• A list of contaminants not subject to NPDWR, known to occur, that may require regulation.
• Primary source of priority contaminants for dw program.• Focus and prioritize research agenda (Research Strategy)
• Source for selection of contaminants to monitor (UCMR)
Make regulatory determinations for at least 5 Make regulatory determinations for at least 5 contaminants by August 2001 and every 5 years aftercontaminants by August 2001 and every 5 years after
9
CCL
Research &Occurrence
Priorities: 48 Occurrence Data
Collection
Research
FurtherAnalysis
Regulate
Don't Regulate
Other (guidance)
Next CCL
(2003)
RegulatoryDeterminationPriorities: 12
2001 Decision Actions
Health, Treatment, Analytical Methods
CCL Priorities and Actions
.
10
CCL Activities
Research and Occurrence
Needs
Research and Occurrence
Needs
Regulatory Determinations
Regulatory Determinations
Future CCLsFuture CCLs
Setting Priorities for Drinking Water Contaminants, NRC
NDWAC Working Group Health Effects and
Occurrence Data Analysis
CCL Research Strategy
UCMR Data Collection
Identifying Future Drinking Water Contaminants, NRC
NRC Study AWWARF Study NCOD Development Emerging pathogens
11
Reg Determination PrioritiesNaphthalene
HexachlorobutadieneNaphthalene
Hexachlorobutadiene
1,3-dichloropropeneAldrin
Dieldrin MetolachlorMetribuzin
1,3-dichloropropeneAldrin
Dieldrin MetolachlorMetribuzin
Sodium (guidance) Boron
Manganese Sulfate Sodium (guidance) Boron
Manganese Sulfate
Acanthamoeba (guidance)Acanthamoeba (guidance)
12
SDWA Criteria to Regulate (1412(b)(1)(A))
Publish MCLG and promulgate NPDWRs if the Administrator determines that:(i) The contaminant may have an adverse effect on
the health of persons;(ii) The contaminant is known to occur or there is
substantial likelihood that the contaminant will occur in public water systems with a frequency and at levels of public health concern; and
(iii) Regulation of the contaminant presents a meaningful opportunity for health risk reduction for persons served by public water systems.
13
What is our Approach in making Determinations? • NRC report: “Setting Priorities for Drinking Water
Contaminants”
• Stakeholder meetings
• AWWRF and NDWAC efforts - Approaches for selecting contaminants and recommended protocols for making reg determinations
14
Timeline
Evaluate Data
4/2001 8/2001
Prepare Support Documents
1/2000
Propose Determinations in FR
Stakeholder Input
Finalize Determinations in FR
Public Comment
15
SDWA ScheduleResearch & Occurrence Data
Collection for CCL1 contaminants
Research & Occurrence Data Collection for CCL2 contaminants
97 98 99 00 01 02 03 04 05 06
CCL1Feb 98
Regulatory Determinations
Aug 2001
Proposed rule(s)Aug 03
Final Rule(s)Feb 05
CCL2Feb 03
RegDeterm’
ns
16
Feedback• Which, if any, require attention?
metolachlor, aldrin, dieldrin, 1,3 dichloropropene, metribuzin, acanthomeoba, sulfate, sodium, naphthalene, boron, manganese and hexachlorobutadiene
• What criteria to regulate should we be looking at?
• Which unregulated contaminants, if any, are you most concerned about?
• Recommendations?
17
Information or Questions
Dan OlsonUSEPA Office of Ground Water and Drinking
Water
202-260-6269