^§SL The UCMR Update
With Wisdom Comes Change
Editor's Notes
Those of you who have an outstanding memory might
notice that as the seasons change, so have the interns.
Not only am I the newest person on the team, I am the
first female editor of The UCMR Update!
Some of you might be wondering, "Who is this lady, and what did she do with Cory
Wagner?" Cory is in DC if you want to look him up in the phone book, and I am an
Oak Ridge Interning Fellow with the Technical Support Center in Cincinnati. I
recently shifted from recycling (a.k.a. garbage or solid waste) to water. My family
seems to think that I am moving up in the world. Now my father can proudly say that
his daughter works with water instead of garbage.
Life in Cincinnati is great, and we are working night and day to bring you the next
cycle of the Unregulated Contaminant Monitoring Regulation (UCMR). The UCMR 2
Rule was proposed on August 22, 2005. Do not worry; the next cycle is easier!
Believe me, my mentor made me read both UCMR 1 and 2, and UCMR 2 appears
simpler. The UCMR team has listened to comments, and improved many aspects for
UCMR 2. Thus, the changes they made were done to make your life easier.
Issue 8
Brenda Parris, Editor
O.R.I.S.E. Fellow
Technical Support Center
September 2005
EPA 815-N-05-001a
Just in case you were wondering if you should read this, the main goals are to:
•	Bring closure to UCMR 1 so we all can sleep at night.
•	Introduce UCMR 2 so we can prepare for the next adventure.
Table of Contents
Editor's Notes	2
UCMR 1	3
Changes Between UCMR 1 & 2	3
Proposed UCMR 2	5
Partnership Agreements for States	6
Lab Approval Program	6
Remember These Dates	6
Want to Know More?	7
Contact Information	7
UCMR Update Issue Number 8-
Issued by the Technical Support Center
(TSC) of the Office of Ground Water
and Drinking Water (OGWDW). Future
updates will be distributed as needed to
maintain the flow of Unregulated
Contaminant Monitoring Regulation
(UCMR) information.

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UCMR 1
UCMR 1 is a success! Of the 3900 public water systems (PWSs) required to monitor,
99.7% have reported all or part of their data. We recognize that some of you have yet
to complete your data reporting, and may be collecting additional data per
Administrative Orders from your Region. Regardless of your circumstances we urge
you to complete what you have started. We cannot stress enough the importance of the
UCMR program.
In 1996 the Safe Drinking Water Act (SDWA) was amended requiring the EPA to
establish criteria to monitor unregulated contaminants, and to identify a maximum of
30 contaminants to monitor every five years. As a result, the UCMR program was
developed. The program was developed to coordinate with the Candidate Contaminant
List (CCL) and the National Drinking Water Contaminant Occurrence Database
(NCOD). The data collected through the program is stored in the NCOD to facilitate
analysis, review contaminant occurrence, and to guide the development of subsequent
CCLs.
The UCMR program benefits the environment and public health by providing EPA
and other interested parties with scientific data on the occurrence of these
contaminants in drinking water, permitting assessment of the population potentially
being exposed, and the levels of that exposure. This is the primary source of
occurrence and exposure data the Agency uses to determine whether to regulate these
contaminants in the interest of protecting public health. How great is that? Knowing
that you are participating in such an important process that protects the environment
and public health.
NEWS FLASH! The Safe Drinking Water Accession and Review System
(SDWARS) is closing! This is not a joke. On September 30 the Central Data Exchange
(CDX) will no longer allow anyone to register for UCMR 1. Everyone needs to be
registered to submit data. The SDWARS will not accept UCMR 1 data after December
9! Please approve, review and submit any data that needs to be included in UCMR 1.
Changes Between UCMR 1 & 2
Times have changed since UCMR 1 was initiated in 1999. The price of gas was only
$1.16 per gallon and everyone was preparing for Y2K. We all are aware of the
changes to the price of gas, and Y2K has become a distant memory. Kids born in 1999
started first grade this fall! Just think, as you sit in your "green vehicle" behind a line
of traffic following a school bus this fall, students are not the only ones who are
learning. The UCMR team learned from UCMR 1, and made positive changes to the
proposed UCMR 2. Note your cheat sheet of changes.
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Topic
1999-UCMR 1
2005-Proposed UCMR 2
Number of Contaminants
25
26
Number of Methods
25
9 (4 are perchlorate methods)
Number of Reporting
Elements
18
15
Laboratory Approval
Most methods required
state certification.
Aeromonas and
perchlorate required EPA
approval
EPA approval required for all
contaminants
Posting and Approving
Data
PWSs used SDWARS to
approve data
PWSs use SDWARS to approve
data. Defaults to approved 60
days after posted by lab
PWS's Population
Subject to multiple
interpretations
Set as of June 30, 2005
Number of Small PWSs
Considered for Screening
Survey (List 2)
180
480
Number of Large PWSs
Considered for Screening
Survey (List 2)
120
~ 325 PWSs serving more than
100,000 people, and 320
randomly selected PWSs serving
10,000-100,000 people
Screening Survey (List 2)
Monitoring Period
12 months of monitoring
within a 1 -year period
12 months of monitoring within
a 2-year period
Contact Info
Unspecified
Large PWSs must submit
information to SDWARS
Large PWS Sampling
Schedule
Scheduled by a sampler
within a 3 year time
frame
Scheduled by EPA with
allowances for changes if needed
Sampling Location
EPTDS or phase II/V
sample points. In
addition, Aeromonas
samples were collected at
3 locations in the
distribution system
EPTDS or a representative
EPTDS for PWSs with multiple
ground water entry points. In
addition, nitrosamine samples
are collected at the maximum
residence time location in the
distribution system
Calculating PWS
Population Served
Subject to many
interpretations
Clearly defined as total
population; retail + wholesale
Acronyms: EPTDS = entry point to the distribution system; PWS = public water system;
SDWARS = Safe Drinking Water Accession and Review System
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Proposed UCMR 2
Since I already went over the changes from UCMR 1 there is little to say about
UCMR 2. You might say that not much has changed since I was able to summarize a
168 page document into a small table.
Three key points to remember about UCMR 2 are listed.
1. Assessment Monitoring (List 1) - uses six methods to monitor 11 contaminants
(four of the six methods are for perchlorate)
•	Sampling occurs during a 12-month period between July 2007-June 2010
•	Requires all PWSs serving more than 10,000 people to monitor
•	Requires a representative sample of 800 PWSs serving 10,000 or fewer people
to monitor
Assessment Monitoring (List 1) Contaminants
Dimethoate
2,2',4,4,-tetrabromodiphenyl ether (BDE-47)
Terbufos sulfone
2,2',4,4',5-pentabromodiphenyl ether (BDE-99)
1,3-dinitrobenzene
2,2',4,4,,5,5,-hexabromobiphenyl (245-HBB)
Perchlorate
Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX)
2,4,6-trinitrotoluene (TNT)
2,2',4,4,,5,5,-hexabromodiphenyl ether (BDE-153)

2,2',4,4',6-pentabromodiphenyl ether (BDE-100)
2. Screening Survey (List 2) - uses three methods to monitor 15 contaminants
•	Sampling occurs during a 12-month period between July 2007-June 2009
•	Requires all PWSs serving 100,000 or more people to monitor
•	Requires a representative sample of 320 PWSs serving 10,001-100,000 people
to monitor
•	Requires a representative sample of 480 small PWSs serving 10,000 or fewer
people to monitor
Screening Survey (List 2) Contaminants
Alachlor
Metolachlor OA
Alachlor ESA
N-nitroso-diethylamine (NDEA)
Alachlor OA
N-nitroso-dimethylamine (NDMA)
Acetochlor
N-nitroso-di-n-butylamine (NDBA)
Acetochlor ESA
N-nitroso-di-n-propylamine (NDPA)
Acetochlor OA
N-nitroso-methylethylamine (NMEA)
Metolachlor
N-nitroso-pyrrolidine (NPYR)
Metolachlor ESA

3. Laboratory Approval Program - requires laboratories wishing to analyze
samples request and be granted EPA approval.
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Partnership Agreements for States fflSUlK YOU
Back by popular demand... the PA! Your comments from UCMR 1 have driven the
design of this document to be more user friendly and easier to read. It identifies
activities performed by the state that are key to the success of the program. Since the
PAs needs to be in place by December 31, 2005, State officials should be hearing from
their Region soon.
THANK YOU! The states helped make UCMR 1 a success. We truly appreciate all
their support, assistance and suggestions. We look forward to working with them on
UCMR 2.
Laboratory Approval Program
Laboratories interested in analyzing samples for public water systems (PWSs) must be
aware of the UCMR 2 laboratory approval requirements. They need to register for the
Laboratory Approval Program, and complete the method-specific application
packages. Upon review, qualified labs will be eligible to participate in a proficiency
testing (PT) program. Laboratories that successfully complete the PT program are
granted method-specific approval to analyze samples once the final UCMR 2 is
promulgated. To begin this process, please write:
UCMR 2 Laboratory Approval Coordinator
US EPA, Technical Support Center
26 West Martin Luther King Drive (MS 140)
	Cincinnati, OH 45268	
PWSs need to notify their contracting laboratory to make sure that they are
aware of the Laboratory Approval Program.	
Remember These Dates
August 22, 2005
UCMR 2 published in Federal Register
October 21, 2005
Public comment period ends
Mid-2006
Anticipated UCMR 2 final rule published
July 1, 2007
Proposed date that UCMR 2 monitoring will begin
Reporting Deadlines Before Monitoring Begins
Within 90 Days from
final rule publication
Large PWSs (serve > 10,000 people) report contact
information to SDWARS
Within 210 Days from
final rule publication
Large PWSs must:
(1)	Review and edit sampling location and inventory
information; and
(2)	Review and edit monitoring schedule
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After 210 Days from
final rule publication
Large PWSs must:
(1)	Notify EPA of sampling location and inventory changes;
and
(2)	Notify EPA if unable to sample according to established
schedule
Reporting Monitoring Results
Within 120 Days from
sample collection
Labs must post monitoring results to EPA's electronic
reporting system
Within 60 Days from
lab posting data
Large PWSs review and approve data
Want to Know More?
Unregulated Contaminant Monitoring Regulation 2
http ://www. epa. gov/safewater/ucmr/ucmr2/
Contact Information
Laboratories and PWSs: when contacting EPA about UCMR issues, please use your
U. S. EPA Lab ID or PWSID, respectively.	
Drinking Water Hotline: General UCMR questions may be directed to:
1-800-426-4791
SDWARS Help Desk: SDWARS/UCMR registration and reporting system questions
may be directed to:
1-888-890-1995
TSC Correspondence: May be directed to:
UCMR Coordinator
Technical Support Center (MS-140)
U.S. Environmental Protection Agency
26 W. Martin Luther King Drive
Cincinnati, OH 45268
Fax: 513-569-7191
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