Water quality status and bacteria risk rating
📍 Far west end of Kauaʻi, requires 4WD. About 1 hour from Līhuʻe.
Polihale has excellent water quality from a bacteria standpoint. This remote 17-mile beach on Kauaʻi’s dry west side has no stream discharge, no development, and no sources of runoff. The water is among the cleanest in Hawaii. However, DOH does not regularly monitor this remote beach — “No DOH Alerts” means no data exists, not that it was tested and found safe.
Important: Low bacteria risk does NOT mean this beach is safe for swimming. Polihale faces the open Pacific with extremely powerful surf, dangerous rip currents, and steep shore break. There are no lifeguards and the remote location means very long emergency response times. Multiple drownings have occurred here. The bacteria risk rating covers water quality only.
Based on: Remote location, no stream discharge, no development, dry west side climate, limited DOH monitoring
Even at low-risk beaches like Polihale, the Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. Polihale is on Kauaʻi’s dry west side and receives very little rainfall, making runoff events rare. Heavy rain also makes the dirt access road impassable, so the beach may be inaccessible during storms.
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⚠️ Important Disclaimer
Safe to Swim Hawaii is an independent passion project — it is not affiliated with the Hawaii Department of Health or any government agency. Water quality ratings on this site 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. DOH only monitors a fraction of Hawaii’s beaches, and some areas have no regular testing at all.
Always verify current water quality conditions with the Hawaii Department of Health Clean Water Branch before entering the water. This site is for informational purposes only and should not be the sole basis for any swimming decisions.
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When in doubt, don't go out. 🤙