Hawaii Water Quality Today
DOH advisory information and separate environmental context. The page must confirm source availability before reporting current status.
Find dated bacteria samples, reported beach surf and measured rainfall, alongside original monitoring sources and historical guides. Each source keeps its own date and coverage.
Dated routine bacteria results from the official Beach Monitoring Results export, with the reported collection date, Hawaiʻi time, station, unit and laboratory method. Coverage varies by island and beach. These samples are separate from current advisories and do not establish swimming safety.
Check current DOH advisories →
Loading dated state laboratory results. Without JavaScript, use the original results source below.
Official Beach Monitoring Results · Original DOH results export (CSV)
This observation explorer does not include official DOH advisories or cancellation notices. Dated samples, surf reports and rainfall below cannot confirm whether an advisory is active or has been canceled.
Check current DOH advisories separately →
Check the official Hawaiʻi DOH advisory system, posted beach signs and lifeguard guidance before entering the water. Missing data does not establish clear conditions.
Choose an island or search a reported station name or identifier. County bacteria samples, dated BWTF community records, reported beach surf and rain-gauge totals retain their own source, date and coverage. They answer different questions and do not form a swimming verdict. BWTF numerical concentrations are withheld while source units remain unverified; exact station links and collection dates are available.
The interactive observations need JavaScript. The original source links above and our dated BWTF station directory remain available.
The sources below provide different kinds of evidence. Advisory status, bacteria samples, ocean conditions and forecasts remain separate:
Use each displayed sample date, observation time and retrieval time. Refresh attempts cannot make an old measurement current or restore missing official advisory information.
Hawaii DOH’s September 2024 Beach Monitoring Program document lists approximately 407 BEACH Act beaches statewide and reports that approximately 167 were monitored in 2023; frequency varies by tier and available resources. BWTF (Surfrider Foundation Blue Water Task Force) provides additional volunteer-run community testing across Kauaʻi, Oʻahu, and Maui. Laboratory methods and units vary. The reviewed BWTF feed does not state a unit. This explorer links dated station records and withholds numerical concentrations while units remain unverified. These programs overlap, so their site counts must not be added together as a statewide coverage total.
The reviewed BWTF feed has no Molokaʻi or Lānaʻi stations. That does not mean no one measures those islands’ waters: some programs collect physical or chemical observations, which do not replace bacteria tests. See the full coverage-gap explainer.
Each source has its own publication and collection schedule. The explorer shows source-specific dates and retrieval times. An unsuccessful refresh remains unavailable; historical pages do not become current because the website was checked again.
That requires comparable measurements over a stated period. The YoY trend page describes historical advisory records; advisory frequency also depends on monitoring coverage and reporting. Missing current records prevent a present-day statewide conclusion.
No. We never label any beach as safe — water-quality advisory data is one factor among several. Physical hazards (rip currents, shore break, surf, marine life) vary by beach and are independent of bacteria readings. Always check the individual beach page for current DOH advisories, posted warning signs, and lifeguard guidance before swimming.