| One-day beach | Extended beach | Permanent beach | |
| Year | closure and advisories | closure (6-12 weeks) | closure (12 or more weeks) |
| (number) | (number) | (number) | |
| 1988 | 484 | 0 | 3 |
| 1989 | 1,052 | 0 | 5 |
| 1990 | 1,592 | 1 | 4 |
| 1991 | 2,008 | 7 | 14 |
| 1992 | 2,619 | 6 | 8 |
| 1993 | 2,438 | 5 | 9 |
| 1994 | 2,279 | 12 | 15 |
| 1995 | 3,522 | 9 | 16 |
| 1996 | 2,596 | 16 | 20 |
| 1997 | 4,153 | 17 | 55 |
| 1998 | 7,236 | 41 | 36 |
Source: Natural Resources Defense Council, Testing the Waters - 1999: A Guide to Water Quality at Vacation Beaches (NRDC, New York, NY, 1999).
Notes: NRDC counts every day of an advisory/closure as one "beach closing." Number refers to the mininum number of closings and/or advisories. Because of inconsistencies in monitoring and closing practices among states and over time, it is difficult to make comparisons between states or to assess trends.
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