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

olson.daniel@epa.gov