Interpretation of time series:
Trend analysis was not appropriate for BEACH Act data.
Interpretation of gauge:
A gauge was not appropriate for this data.
Description of beach closure:
Beach closures are the number of days when beach water and/or air quality is determined to be unsafe. Unsafe water and air quality may have significant impacts on human health, local economies, and the ecosystem. The Environmental Protection Agency (EPA) supports coastal states, counties and and tribes in monitoring beach water quality, and notifying the public when beaches must be closed. Beach water quality is determined by the concentration of bacteria in the water (either Enterococcus sp.or Escherichia coli).
The information presented is from states, counties, and tribes that submit data to the EPA Beach Program reporting database. Not all US beach closures are captured in this database. We present a summary of known EPA Beach Program closure days by year for Alaska, California Current, Gulf of Mexico, Northeast, Hawai’ian Islands, and the Southeast regions..
- 0 - 10: The five-year beach closure days average is very low compared to the median value.
- 10 - 25: The five-year beach closure days average is much lower than the median value.
- 25 - 50: The five-year beach closure days average is lower than the median value.
- 50: The five-year beach closure days average equals the median value.
- 50 - 75: The five-year beach closure days average is higher than the median value.
- 75 - 90: The five-year beach closure days average is much higher than the median value.
- 90 - 100: The five-year beach closure days average is very high compared to the median
Source and analysis of data:
Data obtained from the EPA BEACON website have been provided to EPA by the coastal and Great Lakes states, tribes and territories that receive grants under the BEACH Act. Data was refined to closure, by state or territory, by year. Data that were not identified to a water body or identified as inland water were not included. Data compiled by states or territory and combined in regions defined as IEA regions except PI includes Guam and Marianas. Caribbean and South Atlantic data stand alone. Not all beaches in a state or territory are monitored through the EPA BEACH Act. Data for beaches monitored by state and local municipalities is not included. Changes in the number of beach closure days may be driven by changes in the number of beaches monitored under the BEACH Act versus by state and local municipalities.