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2007 Swimming Season Update
California
July 2008
- Introduction
- 2007 Summary Results
- For More Information
- Print version (PDF) of this document (269 K, 2 pp.; About PDF)
- Raw data (MS-Excel) for California (498 K)
Introduction
Figure 1. California coastal counties with 2007 monitored beach data.
The BEACH Act of 2000 requires that coastal and Great Ldees 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 Ldees 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 California for the 2007 swimming season.
| County | Total Beaches | Monitored | Not Monitored |
|---|---|---|---|
| Del Norte | 12 | 12 | 0 |
| Humbolt | 28 | 28 | 0 |
| Los Angeles | 48 | 48 | 0 |
| Marin | 28 | 28 | 0 |
| Mendocino | 20 | 20 | 0 |
| Monterey | 24 | 24 | 0 |
| Orange | 23 | 23 | 0 |
| San Diego | 74 | 74 | 0 |
| San Francisco | 7 | 7 | 0 |
| San Luis Obispo | 17 | 17 | 0 |
| San Mateo | 41 | 41 | 0 |
| Santa Barbara | 33 | 33 | 0 |
| Santa Cruz | 28 | 28 | 0 |
| Sonoma | 7 | 7 | 0 |
| Ventura | 34 | 34 | 0 |
| Totals | 424 | 424 | 0 |
2007 Summary Results
How many notification actions were reported and how long were they?
Figure 2: Beach notification actions by duration.
California'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 water. A total of 138 monitored beaches had at least one advisory issued during the 2007 swimming season. About 34 percent of California's notification actions lasted two days or less. 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 California's 2007 swimming season, actions were reported about 5 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 | 426 | 425 | 424 |
| Number of beaches affected by notification actions | 153 | 139 | 138 |
| Percentage of beaches affected by notification actions | 36% | 33% | 33% |
| Percentage of beach days affected by notification actions | 4% | 5% | 5% |
What pollution sources affect monitored beaches?
Sources of pollution affecting California's monitored beaches in 2007 were unidentified (Figure 4).
Figure 4: Percent of monitored beaches potentially affected by pollution sources (424 beaches).
For More Information
General information about beaches | Beaches in California
. You can also contact Michael W. Gjerde, California Beach Coordinator at the State Water Resources Control Board at (916) 341-5283.
