The Kona Storm has passed, and beaches are bustling with spring break visitors. However, the ocean water might not be as safe as it seems. Many tourists to Hawaii are unaware that active sewage spill advisories, brown water warnings, and high bacteria alerts are still in effect across Oahu, Maui, and Kauai. Just because a beach is open doesn’t guarantee the water’s safety.
The storm ended. The advisories did not.
It’s easy for visitors to misinterpret the situation. Hawaii doesn’t close its beaches when the Department of Health issues warnings; instead, it posts advisories and leaves the swimming decision to individuals. It seems fair until you imagine a vacationing family glancing at an open beach with no warnings—no barriers, no lifeguard stopping them—and water that might look fine by mainland standards. Just because a beach is open doesn’t mean it’s cleared for swimming. It simply means that the state isn’t making the final call for you.
As of April 1, the Clean Water Branch still had multiple active advisories related to the storm and its aftermath. The general recommendation is to avoid brown or murky water and wait 48 to 72 hours after rain stops for the beach to get plenty of sunshine. But that advice can feel irrelevant when advisories remain longer than that, leading visitors to believe the danger is gone simply because the rain has stopped.
Oahu is particularly problematic. The brown water advisory for the entire island has been in effect since March 20. Additionally, there are multiple sewage spill advisories and four high bacteria warnings since March 31 on the North Shore. For instance, Haleiwa Beach Park recorded 288 enterococci CFU per 100 mL, far above the safe threshold of 130.
The list of sewage spills on Oahu raises red flags. One advisory pertains to a 115,000-gallon spill affecting Wailupe Stream and Maunalua Bay. Another involves a 30,000-gallon incident at Nuupia Pond. There’s also an ongoing advisory for the Kailua Regional Wastewater Treatment Plant that has been active since March 14.
Other advisories remain for Puha Stream near Waimanalo Beach and several other locations in Honolulu and East Oahu. Some advisories remain open with unknown spill volumes, and a few are over two weeks old.
Kauai’s earlier islandwide brown water advisory was lifted on March 31, but it was replaced with two localized alerts, affecting areas from Nawiliwili to Kalapaki Beach and Lydgate Beach to Wailua Beach. This still applies to areas popular with tourists, potentially misleading someone arriving after the weather has improved.
Maui also has one advisory, which is islandwide and has been in place since March 16. While Maui could appear perfectly normal, the state is still warning about brown water conditions island-wide, creating a dilemma for visitors who might not see any visible signs of the advisory unless they actively seek it.
The Big Island is currently free of advisories, but one shouldn’t assume everything is clear across the entire state. The level of risk can vary greatly between islands—and even between beaches on the same day. A trip to Hawaii can seem normal in one area while posing significant water safety risks just a short flight away.
Why visitors can miss this.
This is where Hawaii can be misleading, especially for travelers from the mainland. Many visitors might not be accustomed to swimming in less-than-perfectly clear water. In some regions, brownish water isn’t alarming; it might just mean stirred-up sand or river runoff. However, in Hawaii, brown water following heavy rains can signal contaminated run-off that includes bacteria and other harmful materials.
So, a visitor looks at an open, possibly crowded beach in sunny weather, and the crowd can make it feel safe. An open beach offers reassurance, while real closures are what many expect for serious risks. Unfortunately, that can lead to dangerous choices.
The timing of spring break amplifies the problem. Tourists have often already paid for their trips, and beach days are a major part of the experience. Few want to spend their vacation refreshing advisory pages before heading into the water. Consequently, visitors might inadvertently wade into contaminated waters without realizing they missed a warning, sometimes because they never saw one.
Hawaii beach water quality information is not what most visitors expect.
When brown water advisories are active, the monitoring that visitors typically desire isn’t occurring in the way they might think. Hawaii’s Clean Water Branch has indicated that monitoring beaches during brown water events is impractical, given the broad possibilities and limited testing capacity. Historical trends show that bacteria levels often exceed acceptable limits during these events.
Moreover, Hawaii does not routinely test every beach. According to the state’s own monitoring program, it’s not feasible to check every spot. Only around 57 of the over 250 beaches receive regular testing. This leaves gaps in data for those who assume that all major swimming areas are routinely checked, as they often find themselves choosing between incomplete data and broader storm-related advisories.
One practical solution is SafeToSwimHawaii.com, a site created by a Hawaii resident. It compiles real-time advisory data and test results so visitors can check the conditions at specific beaches before heading into the water.
The problem goes far beyond one storm.
Hawaii’s water quality issues predate this particular rainfall event. The state still has around 83,000 cesspools discharging an estimated 52 million gallons of untreated wastewater daily into the environment. Heavy rain exacerbates this issue, moving the waste closer to groundwater and ocean areas. The storm highlighted an ongoing problem but didn’t create it.
Visitors to Hawaii generally don’t expect to think about wastewater systems before swimming. However, on Oahu, Maui, and Kauai, that’s not always the case. If there’s an active advisory where you plan to swim, don’t dismiss it just because the beach seems busy. A hotel, crowds, or good weather don’t guarantee that the water is safe. Always check advisories, steer clear of the ocean after rain, and allow it more time than your vacation mindset would like.
Have you ever checked Hawaii’s water quality before getting in the ocean?
