Water quality status and bacteria risk rating
📍 Maniniʻōwali, Kohala Coast — Kekaha Kai State Park
Kua Bay (Maniniʻōwali) has some of the cleanest water in Hawaiʻi. The beach sits on the extremely dry Kohala Coast surrounded by lava fields with virtually zero development, no streams, and negligible rainfall. The crystal-clear turquoise water is fed entirely by clean open ocean, making bacteria risk essentially nonexistent under normal conditions.
Despite the pristine water quality, Kua Bay can have powerful shorebreak that creates dangerous conditions, especially during winter south and west swells. The steep sandy beach amplifies wave impact. Limited parking means arriving early is essential — the lot fills by mid-morning on most days.
Based on: Extremely dry lava coast, zero stream input, no nearby development, pristine ocean flushing
The Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. Kua Bay is on one of the driest coastlines in Hawaii and rain is extremely rare. On the rare occasions it does rain on the Kohala Coast, the porous lava rock absorbs most runoff. Water quality at Kua Bay is almost never affected by rain.
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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. 🤙