![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
Michigan Summary: 2006 Swimming Season
May 2007
- Introduction
- 2006 Summary Results
- For More Information
- Print version (PDF) of this document (234 K, 2 pages, About PDF)
- Raw data (MS-Excel) for Michigan (403 K)
Introduction
Figure 1. Michigan coastal counties with 2006 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 Michigan for the 2006 swimming season.
| County | Total Beaches | Monitored | Not Monitored |
|---|---|---|---|
| Alcona | 17 | 1 | 16 |
| Alger | 25 | 1 | 24 |
| Allegan | 11 | 4 | 7 |
| Alpena | 23 | 5 | 18 |
| Antrim | 28 | 5 | 23 |
| Baraga | 24 | 1 | 23 |
| Bay | 10 | 5 | 5 |
| Benzie | 13 | 1 | 12 |
| Berrien | 33 | 14 | 19 |
| Charlevoix | 19 | 13 | 6 |
| Cheboygan | 24 | 6 | 18 |
| Cheppewa | 37 | 7 | 30 |
| Delta | 55 | 2 | 53 |
| Emmet | 34 | 11 | 23 |
| Gogebic | 10 | 0 | 10 |
| Grand Traverse | 45 | 6 | 39 |
| Houghton | 24 | 7 | 17 |
| Huron | 42 | 12 | 30 |
| Iosco | 24 | 8 | 16 |
| Keweenaw | 28 | 1 | 27 |
| Leelanau | 67 | 3 | 64 |
| Luce | 18 | 0 | 18 |
| Mackinac | 60 | 1 | 59 |
| Macomb | 14 | 4 | 10 |
| Manistee | 18 | 9 | 9 |
| Marquette | 9 | 5 | 4 |
| Mason | 19 | 7 | 12 |
| Menominee | 11 | 2 | 9 |
| Monroe | 13 | 5 | 8 |
| Muskegon | 19 | 12 | 7 |
| Oceana | 16 | 6 | 10 |
| Ontonagon | 19 | 2 | 17 |
| Ottawa | 15 | 9 | 6 |
| Presque Isle | 37 | 3 | 34 |
| Sanilac | 23 | 4 | 19 |
| Schoolcraft | 15 | 1 | 14 |
| St. Clair | 25 | 14 | 11 |
| Tuscola | 0 | 0 | 0 |
| Van Buren | 9 | 4 | 4 |
| Wayne | 7 | 2 | 5 |
| Totals | 971 | 211 | 760 |
2006 Summary Results
How many beaches had notification actions?
Figure 2: Monitored beaches with and without notification actions in 2006.
Health departments use the daily and 30-day geometric mean of E. coli levels to determine if a beach closure or an advisory should be issued. When a beach closure or advisory is issued, the health department notifies the owner of the beach, the public, and local and state officials. Of the 211 coastal beaches that were monitored in 2006, 42, or 20 percent, had at least one advisory during the 2006 season (Figure 2).
How many notification actions were reported and how long were they?
Figure 3: Beach notification actions by duration.
A total of 53 beach notification actions were reported in the 2006 swimming season. Most actions were of relatively short duration, with only 7 lasting longer than 7 days. Figure 3 presents breakdowns of action durations.
What percentage of days were beaches under a notification action?
Figure 4: Beach days with and without notification actions.
For Michigan's 2006 swimming season, EPA determined there were a total of 20,129 beach days associated with the 211 monitored beaches. Actions were reported on 478 of those days or about 2 percent of the time (Figure 4).
How do 2006 results compare to previous years?
Beginning in 2003, states are required to submit data to EPA under the BEACH Act for beaches which are in coastal and Great Lakes waters. Table 2 compares 2006 data with data reported in previous years.
| Year | 2004 | 2005 | 2006 |
|---|---|---|---|
| Number of monitored beaches | 219 | 214 | 211 |
| Number of beaches affected by notification actions | 26 | 27 | 42 |
| Percentage of beaches affected by notification actions | 12% | 13% | 20% |
For More Information
General information about beaches | For information about beaches in Michigan 
You can also see the Earth911 Beach Water Quality site for MI .
