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2008 Swimming Season Update
Michigan
May 2009
- Introduction
- 2008 Summary Results
- For More Information
- PDF Version (2 pp, 388K, About PDF) of this document
- Raw data (XLS) (600K) for Michigan
Introduction
Figure 1. Michigan coastal counties.
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 coastal 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 Michigan for the 2008 swimming season.
| County | Total Beaches | Monitored | Not Monitored |
|---|---|---|---|
| Alcona | 15 | 1 | 14 |
| Alger | 19 | 0 | 19 |
| Allegan | 11 | 4 | 7 |
| Alpena | 21 | 5 | 16 |
| Antrim | 28 | 5 | 23 |
| Arenac | 28 | 8 | 20 |
| Baraga | 24 | 2 | 22 |
| Bay | 10 | 5 | 5 |
| Benzie | 10 | 1 | 9 |
| Berrien | 33 | 13 | 20 |
| Charlevoix | 20 | 14 | 6 |
| Cheboygan | 23 | 4 | 19 |
| Chippewa | 27 | 6 | 21 |
| Delta | 55 | 0 | 55 |
| Gogebic | 10 | 0 | 10 |
| Grand Traverse | 47 | 5 | 42 |
| Houghton | 24 | 7 | 17 |
| Huron | 41 | 12 | 29 |
| Iosco | 24 | 8 | 16 |
| Keweenaw | 27 | 1 | 26 |
| Leelanau | 54 | 4 | 50 |
| Luce | 17 | 0 | 17 |
| Mackinac | 56 | 2 | 54 |
| Macomb | 14 | 4 | 10 |
| Manistee | 18 | 9 | 9 |
| Marquette | 9 | 5 | 4 |
| Mason | 16 | 7 | 9 |
| Menominee | 11 | 2 | 9 |
| Monroe | 12 | 5 | 7 |
| Muskegon | 19 | 12 | 7 |
| Oceana | 16 | 6 | 10 |
| Ontonagon | 18 | 2 | 16 |
| Ottawa | 15 | 9 | 6 |
| Presque Isle | 37 | 5 | 32 |
| Sanilac | 23 | 4 | 19 |
| Schoolcraft | 15 | 2 | 13 |
| St. Clair | 24 | 15 | 9 |
| Van Buren | 8 | 4 | 4 |
| Wayne | 7 | 3 | 4 |
| Totals | 921 | 212 | 709 |
2008 Summary Results
How many notification actions were reported and how long were they?
Figure 2: Beach notification actions by duration.
When water quality standards are exceeded at a particular beach, Michigan’s approach is to issue a beach advisory that warns people to avoid contact with the water. A total of 27 monitored beaches had at least one advisory issued during the 2008 swimming season. About 40 percent of Michigan’s 53 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.
For Michigan’s 2008 swimming season, actions were reported about 2 percent of the time (Figure 3).
How do 2008 results compare to previous years?
Table 2 compares 2008 notification action data with monitored beach data from previous years.
| Year | 2006 | 2007 | 2008 |
|---|---|---|---|
| Number of monitored beaches | 211 | 208 | 212 |
| Number of beaches affected by notification actions | 42 | 32 | 27 |
| Percentage of beaches affected by notification actions | 20% | 15% | 13% |
| Percentage of beach days affected by notification actions | 2% | 3% | 2% |
What pollution sources possibly affect investigated monitored beaches?
Figure 4 displays Michigan’s investigated monitored beaches possibly affected by various pollution sources. In 2008, all investigated beaches indicated they had unidentified sources of pollution.
Figure 4: Percent of investigated monitored beaches affected by possible pollution sources (212 beaches).
For More Information
Michigan's 2007 Beach Season Data | General information about beaches | Beaches in Michigan 
