Question 1

Is Coconut Island safe to swim?

Accepted Answer

Coconut Island (Moku o Lo'e) in Kane'ohe Bay has a Moderate bacteria risk rating (3 out of 5). Kane'ohe Bay has well-documented water quality issues from multiple stream inputs, urban runoff, and historical pollution. The bay's enclosed nature means contaminants do not flush as efficiently as open-ocean coastline. Always check conditions visually and avoid the water after heavy rain.

Question 2

What are the water quality issues in Kane'ohe Bay?

Accepted Answer

Kane'ohe Bay receives runoff from multiple streams draining the windward Ko'olau mountains and surrounding residential areas. The bay has a history of water quality problems from urban development, agriculture, and past sewage issues. Multiple streams including Kaneohe Stream carry contaminants into the bay after rain. The bay's barrier reef slows water exchange with the open ocean, meaning pollutants can accumulate.

Question 3

What is the water quality like at Coconut Island?

Accepted Answer

During extended dry weather, water quality around Coconut Island can be acceptable. The island is home to the Hawaii Institute of Marine Biology (HIMB), which conducts marine research. However, the surrounding Kane'ohe Bay water is affected by stream runoff and the bay's limited flushing. After rain, bacteria levels in the bay can rise significantly. DOH monitors some Kane'ohe Bay locations but testing may not always be current.

Question 4

How does Coconut Island compare to other Windward beaches?

Accepted Answer

Coconut Island sits within Kane'ohe Bay, which generally has more water quality concerns than open-coast Windward beaches like Kailua and Lanikai. Kailua Beach has better flushing due to open ocean exposure. Lanikai also benefits from open-ocean conditions. Kane'ohe Bay beaches, including the area near Coconut Island, tend to have higher bacteria risk due to the bay's enclosed nature and multiple stream inputs.

Question 5

Can you visit Coconut Island?

Accepted Answer

Coconut Island (Moku o Lo'e) is primarily used by the Hawaii Institute of Marine Biology (HIMB) for research. Public access to the island itself is limited, but the surrounding Kane'ohe Bay waters are accessible for swimming and kayaking. The public beach area near Coconut Island at He'eia State Park provides access to the bay. Always check water quality conditions before entering Kane'ohe Bay, especially after rain.