Water quality status and bacteria risk rating
📍 Wailua, near Kapaʻa — East Kauaʻi
Wailua Beach is a popular east shore Kauaʻi beach near Kapaʻa. The beach itself has decent open ocean exposure, but its location directly at the mouth of the Wailua River is the primary bacteria concern. Rivers funnel agricultural runoff, sediment, and bacteria from inland areas into the sea — especially after rain.
During extended dry periods, water quality is generally acceptable. The risk climbs significantly after any heavy rainfall on Kauaʻi’s central mountains. DOH testing history shows periodic exceedances tied to rain events.
Based on: DOH beach monitoring, proximity to Wailua River mouth, agricultural runoff potential
The Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. At Wailua Beach, the river mouth risk means you should extend that window if the river appears brown or swollen. Always inspect the water before entering — murky brown water near the river mouth is a clear warning sign.
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⚠️ Important Disclaimer
Safe to Swim Hawaii is an independent passion project — not affiliated with the Hawaii Department of Health or any government agency. Water quality ratings are estimates based on publicly available testing data and geographic analysis. They are not real-time measurements and may not reflect current conditions. “No DOH Alerts” means no advisory is currently posted — it does not mean the water was tested and found safe.
Always verify current conditions with the Hawaii Department of Health Clean Water Branch before entering the water. This site is for informational purposes only.
When in doubt, don't go out. 🤙