&EFA
     United States
     Environmental Protection
     Agency
               EPA's  BEACH  Report:
               Hawaii  2011  Swimming Season
              August 2012
                       EPA820-F-12-032
  Introduction
  The Beaches Environmental Assessment and
  Coastal Health (BEACH) Act of 2000 authorizes
  EPA to provide grants to coastal and Great Lakes
  states, territories, and eligible tribes to monitor
  their coastal beaches for bacteria that indicate the
  possible presence of disease-causing pathogens
  and to notify the public when there is a potential
  risk to public health. The BEACH Act requires that
  recipients of those grants report their coastal beach
  monitoring and notification data to EPA. This fact
  sheet highlights the data submitted to EPA by the
  State of Hawaii for the 2011 swimming season.


  2011 Swimming Season
  Monitoring and Notification
  Actions
  Hawaii monitored 130 coastal beaches in four
  counties during the 2011 swimming season
  (Figure 1 and Table 1). When monitoring results
  at swimming beaches show that levels of specific
  indicator bacteria in the water exceed applicable
  water quality standards, Hawaii officials issue
  a beach advisory, warning people of possible
  risks of swimming. In some cases, advisories are
  issued preemptively (i.e., without having actual
  bacteria monitoring results) due to storms or other
  conditions that might affect swimmer safety.

  How many beaches had notification actions?
  In 2011, all of the 130 coastal beaches that Hawaii
  monitored had island-wide preemptive notification
  actions due to rainfall (Figure 2). Island-wide
  preemptive actions also occurred in 2009 resulting
  in 100 percent of the state's beaches with one or
  more notification actions.
  How many notification actions were issued and
 Figure 1. Hawaii coastal counties.
Table 1.  Number of monitored and
        unmonitored coastal beaches by
        county for 2011.

County
HAWAII
HONOLULU
KAUAI
MAUI
TOTALS
Total
Beaches
83
115
64
127
389

Monitored
35
22
23
50
130
Not
Monitored
48
93
41
77
259

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   Figure 2: Percent of beaches with one or
            more notification actions
   Figure 4: Percent of beach days open
            and safe for swimming
   Figure 3: Duration of beach notification
            actions in 2011

                 1-2 days
                   10%
                                   3-7 days
                                     55%
how long did they last?
Hawaii issued 269 notification actions during the
2011 swimming season. Typically Hawaii lifts an
action when follow-up monitoring indicates that
water quality complies with applicable standards.
For the majority of actions (65 percent) water
quality returned to normal and beaches were
deemed safe for swimming within a week or less
(Figure 3).

What percentage of days were beaches under
a notification action?
EPA calculates the total available beach days and
the number of beach days with notification actions
to better track trends over time. Total available
beach days are determined by multiplying the
                                                        2011

                                                        2010

                                                        2009

                                                        2008

                                                        2007
              To the Beach)
              To the Beach)
             MTo the Beach \
96.4%

99.8%

98.7%

99.9%

99.7%
length of the beach season by the number of
beaches in the state. For 2011 EPA calculated
that 47,450 beach days were associated with the
swimming seasons of the 130 monitored Hawaii
beaches. Hawaii reported notification actions on
1,717 days, meaning that beaches were open and
safe for swimming about 96 percent of the time.
This continues the trend of consistently high
percentages of open beach days at state beaches
(Figure 4).


For More Information
For information about the Hawaii beach program
contact:
Dale Mikami
Department of Health
Tel: 808-586-4331
e-mail: Clinton.mikami@doh.hawaii.gov
For general information about beaches visit:
http://water.epa.gov/type/oceb/beaches/.
For information about a specific beach visit:
http://watersgeo.epa.gov/beacon2/.

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