Manahan Park Beach

Managed by New Hampshire Department of Environmental Services

Manahan Park Beach is a large sandy swimming area that features restrooms and a play area. Franklin Pierce lake covers an area of approximately 519 acres. In rough measures it is about 2 miles long and a half mile wide and its maximum depth is 9.6 meters.

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Water Quality

No data available
Current Status
This status is based on the latest sample. New Hampshire Department of Environmental Services updates the status of this beach as soon as test results become available.

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Monitoring Frequency

Source Information

The New Hampshire Department of Environmental Services monitors water quality at beaches in the state from Memorial Day to Labor Day. Water samples are collected several times a week throughout the swimming season. When advisories are issued, they are posted on the DES website and on its beach advisory Twitter feed (@NHDES_Beaches).

NHDES posts their latest test results to Swim Guide during the monitoring season as soon as they become available.

A beach is marked Green when test results are below water quality standards of 88 counts of E. coli per 100ml or when the geometric mean of at least three samples collected in a 60-day period meets the standard of 47 counts of E. coli per 100ml of water..

A freshwater beach is marked Red when two consecutive samples exceed 88 counts of E. coli per 100ml or when the geometric mean of at least three samples collected in a 60-day period exceeds 47 counts of E. coli per 100ml of water.

A beach is marked Grey when current or reliable information is unavailable.

Water Quality Graph

Other Beaches Near This One

Beach	Location	Water Quality
Beard's Brook Town Beach Hillsboro, New Hampshire	Hillsboro, New Hampshire	Current Status
Emerald Beach Hillsboro, New Hampshire	Hillsboro, New Hampshire	Current Status
Eastman Park Beach Hillsboro, New Hampshire	Hillsboro, New Hampshire	Current Status
Hummingbird Beach Hillsboro, New Hampshire	Hillsboro, New Hampshire	Current Status

	Green means the beach’s most recent test results met relevant water quality standards.

	Red means the beach’s most recent test results failed to meet water quality standards.

	Grey means water quality information for the beach is too old (more than 7 days old) to be considered current, or that info is unavailable, or unreliable.

	Green means the beach passed water quality tests 95% of the time or more.

	Yellow means the beach passed water quality tests 60-95% of the time.

	Red means the beach failed water quality tests 40% of the time or more.

	This means that this site has been issued a Blue Flag status for the current swimming season. This status does not indicate current water quality.

	Red means the water at the site has water quality issues or there is an emergency.

	Grey means there is no current water quality information, the beach is under construction, there has been an event that has rendered water quality information unreliable or unavailable.