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2007 Swimming Season Update
Maryland
July 2008
- Introduction
- 2007 Summary Results
- For More Information
- Print version (PDF) of this document (279 K, 2 pp.; About PDF)
- Raw data (MS-Excel) for Maryland (106 K)
Introduction
Figure 1. Maryland coastal counties with 2007 monitored beach data.
The BEACH Act of 2000 requires that coastal and Great Lakes states and territories report to EPA on beach monitoring and notification data for their coast recreation waters. The BEACH Act defines coastal recreation waters as the Great Lakes and coastal waters (including coastal estuaries) that states, territories, and authorized tribes officially recognize or designate for swimming, bathing, surfing, or similar activities in the water.
This fact sheet summarizes beach monitoring and notification data submitted to EPA by the state of Maryland for the 2007 swimming season.
Maryland Department of the Environment (MDE) works with local health departments and Maryland Department of Health and Mental Hygiene (DHMH) Laboratory to enhance beach water quality monitoring and improve the public notification process for beach water quality in Maryland.
Water quality assessment begins prior to beach season when local health departments collect water samples from beaches and perform beach Pollution Source Surveys to ensure that there are no nearby pollution sources that may adversely impact water quality. MDE has been working with local health departments to utilize a recently developed technology-based data collection system to conduct beach Pollution Source Surveys. This system facilitates the collection of detailed geo-referenced information, and improves data management and analysis. This data system has provided MDE and local health departments with a unique view on how land based activities can impact water quality at beaches and provides the information needed to quickly correct or mitigate problems identified.
Local health departments collect water quality samples from beaches before and during the beach season. These samples are sent to the DHMH Laboratory for analysis. Water quality results that exceed the criteria are immediately reported to local health departments so that beach managers can issue a notification if needed. MDE assembles and submits the monitoring and notification data to EPA.
In 2007, MDE launched a study to address questions about indicator bacteria and pathogens found in beach sand and water. This study is being conducted at selected sites in Maryland and Delaware.
| County | Total Beaches | Monitored | Not Monitored |
|---|---|---|---|
| Anne Arundel | 27 | 27 | 0 |
| Baltimore | 3 | 3 | 0 |
| Calvert | 9 | 9 | 0 |
| Cecil | 6 | 6 | 0 |
| Kent | 8 | 8 | 0 |
| Queen Anne's | 1 | 1 | 0 |
| Somerset | 2 | 2 | 0 |
| St. Mary's | 2 | 2 | 0 |
| Worcester | 10 | 10 | 0 |
| Totals | 68 | 68 | 0 |
2007 Summary Results
How many notification actions were reported and how long were they?
Figure 2: Beach notification actions by duration.
Maryland's approach is to issue a beach advisory when water quality standards are exceeded at a particular beach that warns people to avoid contact with the ocean water. A total of 20 monitored beaches had at least one advisory issued during the 2007 swimming season. The majority of the notification action durations that are 3 to 7 days or 8 to 30 days, shown in Figure 2, reflect the timing between sampling events rather than risk to swimmers or pollution. Figure 2 presents a full breakdown of notification action durations.
What percentage of days were beaches under a notification action?
Figure 3: Beach days with and without notification actions in 2007.
For Maryland's 2007 swimming season, actions were reported about 4 percent of the time (Figure 3).
How do 2007 results compare to previous years?
Table 2 compares 2007 notification action data with monitored beach data from previous years.
| Year | 2005 | 2006 | 2007 |
|---|---|---|---|
| Number of monitored beaches | 73 | 81 | 68 |
| Number of beaches affected by notification actions | 3 | 18 | 20 |
| Percentage of beaches affected by notification actions | 4% | 22% | 29% |
| Percentage of beach days affected by notification actions | 2% | 2% | 4% |
What pollution sources affect monitored beaches?
There were no obvious pollution sources at any Maryland beaches in 2007.
Figure 4: Percent of monitored beaches potentially affected by pollution sources (68 beaches).
For More Information
Maryland's 2006 Beach Season Data | General information about beaches | Beaches in Maryland
