Note to Reader

Atrazine Monitoring Data: 2003-2008

July 2009

Objective

The purpose of this document is to provide:

an overview of the Agency’s atrazine monitoring data 

context in which the monitoring data was collected

guidance in accessing the data

Introduction

As part of EPA’s reregistration for atrazine, the Agency required that
atrazine registrants conduct drinking water and ecological exposure
monitoring as stipulated in the Agency’s 2003 Atrazine Reregistration
Eligibility Decision (RED).  The resulting monitoring data has been
published in the Agency’s atrazine docket, which is available at  
HYPERLINK "http://www.regulations.gov"  www.regulations.gov  under
docket number EPA-HQ-OPP-2003-0367.  To-date, the Agency has atrazine
data pertaining to community drinking water systems and ecological
monitoring in Midwestern streams, as well as water bodies associated
with sugarcane production areas.  Additional information regarding the
Agency’s work on atrazine is available at the Agency’s atrazine
website:   HYPERLINK
"http://www.epa.gov/pesticides/reregistration/atrazine/" 
http://www.epa.gov/pesticides/reregistration/atrazine/ 

Atrazine Community Water Systems (CWS) Monitoring Program

Background and status updates regarding the program can be found at the
following link:

  HYPERLINK
"http://www.epa.gov/pesticides/reregistration/atrazine/atrazine_update.h
tm#cws" 
http://www.epa.gov/pesticides/reregistration/atrazine/atrazine_update.ht
m#cws 

All Atrazine Monitoring Program (AMP) data files contain the results for
all Community Water Systems (CWS) that have been monitored over a 6-year
period from 2003-2008.  Each data file includes a “ReadMe” worksheet
that explains the data contained in the file.  AMP data for 2003 and
2004 do not contain simazine data.  AMP data from the latter half of
2005 onward contain data for all triazine residues, including simazine. 


Ecological Watershed Monitoring Program – Midwestern Streams

Background and status updates regarding the program can be found at the
following link:

  HYPERLINK
"http://www.epa.gov/pesticides/reregistration/atrazine/atrazine_update.h
tm#ewmp" 
http://www.epa.gov/pesticides/reregistration/atrazine/atrazine_update.ht
m#ewmp 

The Atrazine Ecological Exposure Monitoring Program (AEEMP) data file
contains atrazine data for 40 Midwestern streams.  Each stream has at
least two years of monitoring data collected during a four year period
from 2004 through 2008.

Ecological Watershed Monitoring Program – Sugarcane-Growing Areas

Background and status updates regarding the program can be found at the
following link:

  HYPERLINK
"http://www.epa.gov/pesticides/reregistration/atrazine/atrazine_update.h
tm#ewmp" 
http://www.epa.gov/pesticides/reregistration/atrazine/atrazine_update.ht
m#ewmp 

The sugarcane monitoring data file contains atrazine data for four water
bodies associated with sugarcane production.  Monitoring data presented
here were collected from 2005 through the early part of 2008.

