Water quality status and bacteria risk rating
📍 West Oʻahu near Kapolei. About 30 min from Waikiki.
White Plains Beach has generally clean water quality. This former military beach is now open to the public and features open ocean exposure with good water flushing on the west side of Oʻahu.
Some development is nearby but there is no major stream discharge directly into the beach area. The west side of Oʻahu receives less rainfall than the windward side, which means less frequent runoff events. Popular with bodyboarders and families for its consistent shore break and sandy bottom. Lifeguards are on duty.
Based on: Ocean circulation patterns, no major stream discharge, development proximity
After heavy rain, the Department of Health recommends staying out of the ocean for at least 72 hours. While White Plains Beach has no major stream discharge, the west side can still be affected by urban runoff from nearby development after significant storms. The good news is that the Ewa plain gets less rain than most of Oʻahu, so runoff events are less frequent.
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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. 🤙