For generations, West Hawaii’s picturesque coastlines have been a gathering place for fishing, swimming and ceremony. But those sacred waters are also gathering something else.
Using airborne mapping, field sampling and advanced statistical analysis, researchers at Arizona State University’s Center for Global Discovery and Conservation Science in Hawaii revealed that nearly half of West Hawaii’s coastline is being quietly contaminated with raw sewage.
As a result, coral reefs in bays like Hōnaunau are struggling to flourish, weakening ecosystems that people rely on for food, and harming their ability to protect coastline communities from erosion and rising sea levels. The sewage-contaminated ocean water not only threatens the environment but also exposes swimmers to E. coli, salmonella and other pathogens or parasites that sicken people.
The researchers collected water samples from 47 shoreline sites in the South Kohala, North Kona and South Kona regions. Of those sites, 42 percent had elevated levels of a bacteria that indicates sewage contamination, and the levels were high enough in nearly a quarter of the sites to threaten both the environment and human health, their study found.
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“The most alarming thing was how consistently we found contamination at popular swimming sites, places where families take their kids,” said Kelly Hondula, associate research scientist at the Center for Global Discovery and Conservation Science and lead author of the study. “Some of these sites regularly test above public-health thresholds, meaning swimming there poses a higher risk of disease.”
Cesspools and leaky septic tanks are a key reason for the water contamination, the researchers say.
Hawaii banned the creation of new cesspools in 2016, the last U.S. state to do so. But
more than 88,000 cesspools, which Hawaii’s Department of Health describes as “little more than holes in the ground,” still operate in the state. Each day, homes and businesses using this inexpensive but ineffective form of waste management discharge more than 53 million gallons of untreated sewage.
Andrea Kealoha, an assistant professor of marine biology and geochemistry at the University of Hawaiʻi at Mānoa, who wasn’t involved with the new study, notes that the use of injection wells in the state also contributes to sewage contamination in water.
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“They take the wastewater, all of the wastewater, to facilities in a community, they treat that water, but they don’t really remove the nutrients or the other pollutants,” she said.
What makes the West Hawaii region so vulnerable to coastline contamination is a phenomenon known as submarine groundwater discharge. West Hawaii is built upon the young lava flows of the Hualālai and Mauna Loa volcanoes. The hardened lava, once fluid, has dried up and is filled with cracks, tubes and voids. When homes, businesses and wastewater management plants discharge wastewater into the ground from cesspools, septic tanks or injection wells, it quickly travels through the lava tubes and fractures, emerging under the coast’s tideline.
That process disperses the substances carried along with the waste. Among them is nitrogen, a nutrient that helps plants grow but in higher concentrations can harm marine ecosystems. In such conditions, it’s harder for coral reefs to reproduce and recover after incidents like bleaching.
Coral reefs are seen in declining health in the waters near Puako, Hawaii. Credit: Greg Asner/ASU
“The nitrogen that leaks out into the ocean from groundwater contamination and into the reef system stimulates the growth of algae, the kind of algae that grows on the sea floor, like a weed. And that algae overtakes the coral,” said Greg Asner, director of Arizona State University’s Center for Global Discovery and Conservation Science and senior author of the study.
When that algae dies and decomposes on the coastline floor, it consumes oxygen in the water. Too much of that leaves fish and invertebrates unable to survive.
“If we continue on the pathway of not taking action, not improving water quality, we’re going to see more ecosystem loss,” said Jasmine Fournier, executive director of the Ocean Sewage Alliance, which aims to reduce the waste contamination problem. “The things we expect when we go into the water, we might not be seeing as much anymore. We’ll see more algal blooms, more fish kills, fishermen who can no longer maintain their livelihoods because the fish stocks are gone.”
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A 2017 law requires all cesspools to be converted to more effective waste management by 2050, but Kealoha said ASU’s findings should prompt more action.
“We have such a hard time as local communities to combat the whole greater climate issue—which comes with ocean warming and ocean acidification—but we do have power to combat these local stressors,” she said.
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Jaylan Sims
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Jaylan Sims is a senior at Vanderbilt University, majoring in communication of science & technology and communication studies. An Appalachian native, Sims covers climate activism, agriculture and climate research out of Nashville. Previously, Sims covered the environment for The Nashville Banner, Minnesota Public Radio and outlets across Minnesota. Sims hosted The Vanderbilt Hustler’s VU History Podcast, earning the publication its first national audio-journalism award.
Authorities in Hawaii have charged a 36-year-old man with murder in the killings of three people in a remote community known for its eclectic, communal lifestyle.
Jacob Daniel Baker was charged with counts of first- and second-degree murder Saturday, the Hawaii Police Department said in a news release.
Baker remained jailed without bond Sunday and police said his first court appearance was scheduled for Monday. It was not immediately known if Baker had an attorney who could speak for him.
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Charges in the killings came two days after police apprehended Baker following a manhunt on Hawaii’s Big Island, where the three victims were found in the rural Puna community known for its tropical landscape and free-spirited residents.
Robert Shine, 69, was found dead Monday partially submerged in a cement pond, according to police. The second victim, a 79-year-old man, was discovered Tuesday a few hundred feet away. Friends identified him as Chitta Morse.
Police found the third victim, 69-year-old John Carse, late Tuesday at a property 19 miles from where the other two bodies were located.
Police have not given a suspected motive for the killings. Hawaii Police Chief Reed Mahuna has said investigators found no connections among the victims other than that two of them lived near each other.
In addition to the murder charges, Baker also faces counts of burglary, auto theft and criminal damage to property.
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The killings left residents on edge in Puna, a community set amid lush jungle and barren lava fields where people seeking to live off-grid commonly trade work for lodging.
Puna resident Stephen Shaffer said that Baker had worked for his ex-wife, climbing coconut trees on land where she grows fruit, in exchange for a place to live. After several months, Shaffer said, his ex-wife sought a restraining order against Baker, saying she felt threatened by him.
Donald Hyatt, a friend of Shaffer’s ex-wife and of two of the men killed, said Baker left the cabin where he had been living months ago. Hyatt said that Baker recently returned claiming “squatter’s rights” and threatened Shaffer’s ex.
Just days before the killings, two women had requested temporary restraining orders against Baker, saying he had threatened and harassed them, according to court records. A judge denied both applications, saying there was not enough proof of harassment.
Court records showed Baker named in 20 other cases in the past two decades, many of them traffic infractions. In most of those cases, Baker had no attorney and represented himself.
Hawaii is home to a wide range of towns that give older adults relaxing ways to enjoy their retirement years. Across the islands, retirees can find communities with easy access to healthcare and outdoor recreation. Coastal towns like Kailua-Kona and Līhuʻe offer ocean views and nearby medical care. Inland communities such as Waimea and Makawao provide cooler weather and an easier rhythm. Retirees may be drawn to smaller places with a strong community feel, while those wanting more services may prefer regional hubs like Hilo. Together, these Hawaiian towns offer a mix of natural beauty and everyday comforts.
Kailua-Kona
Keauhou Bay, Kailua-Kona, Hawaii.
Kailua-Kona is a coastal town on the Big Island of Hawaii with fewer than 25,000 residents. It continues to attract retirees thanks to its warm weather and ocean access. Areas like Kealakehe and Holualoa are still growing, with new subdivisions adding more housing options for people who want to stay long-term.
Most medical care is provided by the nearby Kona Community Hospital, and clinics throughout the Kona district offer additional services. Some of the main landmarks are Kailua Pier, Huliheʻe Palace, Kamakahonu Beach, and Kona Commons Shopping Center. These spots help residents stay active year-round.
Hilo
Overlooking Hilo, Hawaii.
Hilo is a well-known retirement-friendly community on Hawaii Island, known for being easy to walk around. With about 48,000 residents, according to recent Census data, Hilo is a regional center for healthcare, education, and government services, which helps create long-term stability for residents.
Hilo Benioff Medical Center is the main hospital for East Hawaii and provides most of the area’s healthcare. There are also outpatient and senior care services, such as the nearby Life Care Center of Hilo.
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People in Hilo often spend time at places like Wailoa River State Recreation Area, Hilo Farmers Market, Liliʻuokalani Gardens, and Rainbow Falls. These spots are close to neighborhoods like Waiākea and Keaukaha.
Waimea
Rolling green pastureland with white fences near Waimea, Hawaii’s Big Island.
Waimea is a small inland town on Hawaii Island with fewer than 10,000 residents. Because it sits at a higher elevation, the weather is cooler, with daytime temperatures usually between 70 and 80°F and nights that feel much cooler.
Residents have access to healthcare through local clinics and services linked to Queen’s North Hawai’i Community Hospital in Waimea, which provides essential care for the area. The town has strong connections to Parker Ranch, one of the country’s largest ranches, as well as nearby ranchlands. Waimea attracts retirees who want a quieter inland setting, strong community organizations, and fewer people.
Līhuʻe
A couple walks along Kalapaki Beach in Lihue, Kaua’i, Hawai’i.
Līhuʻe serves as Kauai’s administrative and service center and has fewer than 10,000 residents. The town plays a central role in healthcare and government operations across the island. It is just 30 minutes from Hanapepe and offers retirees a small-town feel, with natural scenery all around.
Wilcox Medical Center is the largest hospital on the island and provides care for residents throughout Kauai. Notable landmarks include Kalapaki Beach, Nawiliwili Harbor, Kauai Museum, and Kilohana Plantation. Together, these sites support recreation, tourism, and community events across the area.
Kapa’a
Shops in downtown Kapa’a in Hawaii. Image credit bluestork via Shutterstock.com
Kapaʻa sits on the east side of Kauai and has about 11,000 residents. It is easy to get around on foot, with everything you could need close by. The town serves as both a place to live and a hub for businesses in the area.
Residents can access healthcare at local clinics such as The Clinic at Kapaa or at Wilcox Medical Center in Līhuʻe. Some well-known spots in Kapaʻa are Kapaʻa Beach Park, the Sleeping Giant Trail, Coconut Marketplace, and Wailua River State Park. Coconut Marketplace has a Farmer’s Market twice a week, plus live local music. Hula classes and shows are also a local favorite offered at Coconut Marketplace.
Kailua
Overlooking Kailua, Oahu.
Kailua is a residential area on the windward side of Oahu with fewer than 50,000 residents. The town is known for its easy access to beaches and well-established neighborhoods such as Enchanted Lake and Coconut Grove.
Residents have access to healthcare through nearby hospitals in the Honolulu area. Adventist Health Castle, which is located in Kailua, is one of the main options. In addition, Kalapawai Market is a local favorite to grab coffee, ube scones, and other treats.
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Kailua is home to many beaches for swimming and watersports, including Kailua Beach Park. Lanikai Beach is a public beach within a residential neighborhood, with no lifeguards, restrooms, or public parking lot. For walking and biking, Kawainui Marsh Wildlife Sanctuary is a popular dog-friendly wildlife sanctuary with a scenic trail.
Haleʻiwa
Aerial view of Haleiwa, Hawaii.
Hale’iwa is known for its slower pace and strong connection to Oahu’s North Shore coastline. This historic North Shore town is said to be the quirkiest and has a population of under 5,000. It maintains a small commercial core while serving nearby rural communities.
Healthcare is available through clinics in Waialua and through The Queen’s Medical Center – Wahiawā in central Oahu.
Notable landmarks in Haleʻiwa include Haleʻiwa Beach Park, a popular spot for fishing and sunset views, and Waimea Bay, known for its large winter surf and summer swimming conditions. The nearby Banzai Pipeline draws surfers from around the world during big-wave season on Oahu’s North Shore. Residents also spend time at Haleʻiwa Aliʻi Beach Park, which has picnic areas and shoreline walking paths.
Wahiawa
Waikele Premium Outlets in Honolulu County, near Wahiawa, Hawaii. Image credit ARTYOORAN via Shutterstock.com
Wahiawa is a central Oahu community with a population of roughly 17,000. It sits between the island’s north and south regions, and provides a quieter inland setting while still allowing access to both Oahu’s north and south coasts.
Healthcare in Wahiawa is available through in-town facilities, such as The Queen’s Medical Center – Wahiawā.
Local landmarks include Lake Wilson, where residents fish and kayak, and the Wahiawa Botanical Garden, known for its large tropical trees and walking paths. Nearby Schofield Barracks remains one of the largest military installations in Hawaii and shapes much of the area’s economy. Residents also rely on Whitmore Village for local businesses, neighborhood services, and access to agricultural areas outside town.
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Makawao
The town of Makawao sits on the slope of the Haleakala volcano in Maui.
Makawao is a small town in upcountry Maui with fewer than 10,000 residents. Its higher elevation gives the area cooler temperatures than much of coastal Maui, especially during the evenings.
Makawao maintains a rural atmosphere while still keeping residents close to shopping and healthcare in nearby Kahului and central Maui for routine and specialized care.
Residents enjoy art galleries, and nearby access routes to Haleakalā National Park, which draw both residents and visitors into Maui’s upland landscapes. The community also gathers around Oskie Rice Event Center, which hosts rodeos and local events throughout the year, while Pukalani Country Club provides golf and recreation with views of central Maui.
Pāhoa
Downtown Pahoa, Hawaii. Image credit Chris Allan via Shutterstock
Pāhoa is a small town on Hawaii Island with fewer than 1,000 residents. The community has a slower pace of life and a strong local character shaped by East Hawaii’s volcanic landscape. Residents access healthcare through clinics in nearby Hilo and facilities connected to Hawaiʻi Health Systems Corporation in East Hawaii.
Local landmarks include Lava Tree State Monument, where lava formations surround walking paths through tropical forest, and the historic downtown which still contains several older storefronts and small local businesses such as Tin Shack Bakery. Nearby Pohoiki Black Sand Beach has become a popular coastal gathering area following recent volcanic activity, while the former Ahalanui Park site (destroyed by the Kīlauea lava flow in 2018) remains an important part of the region’s history and shoreline identity.
Honoka’a
Overlooking Honoka’a, Hawaii.
Honokaʻa is a small plantation-era town on the Big Island of Hawaii. With fewer than 3,000 residents, its historic main street reflects its sugar industry past with preserved storefronts and a compact town center that still serves the surrounding Hamakua Coast communities.
Residents access healthcare through Queen’s North Hawai’i Community Hospital in nearby Waimea, which provides essential services for the region.
Along the main corridor, residents frequent shops such as Tex Drive-In, known for its malasadas, and Cafe Il Mondo, a long-running local café. The nearby Kalōpā State Recreation Area offers forest trails and native vegetation, while the Hamakua Coast provides scenic coastal drives with waterfalls and ocean views. Routes toward Akaka Falls connect the town to one of the island’s most visited natural landmarks.
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Hawaii Retirement Across the Islands
Retirement spots in Hawaii are found across the islands, each with its own pace of life. Towns like Kailua-Kona and Līhuʻe keep residents close to healthcare, services, and coastal scenery, while places such as Waimea, Makawao, and Honokaʻa offer quieter inland settings with strong local character. Others, including Hilo, Kapaʻa, and Haleʻiwa, balance everyday conveniences with beaches, parks, markets, and community gathering places. As people in Hawaii look for more space, fewer crowds, and reliable access to care, these towns show how varied retirement living can be across the state.
HONOLULU (HawaiiNewsNow) – A new optical illusion is taking shape in Kalihi.
Commissioned by Kamehameha Schools, the mural will feature plants and trees native to the area. The artwork aims to highlight how forestry can exist within urban areas.
Coincidentally, the new artwork sits adjacent to one of Kalihi’s most famous murals: Wave 01/101.
The artist Kai’ili Kaulukukui plays with depth and shadow, creating an optical illusion on the flat face of a building.
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“The painting style is called ” trompe-l’œil”, it means ‘trick the eye’,” says Kaulukukui. “It’s been around for 2000 years. They have images of trompe-l’œil style murals at Pompeii, so it’s a very old style.”
Kaulukukui said he’s always been intrigued by the art style, though this is his first time painting it.
“They’re both kind of environmental themed murals,” he said. “This is bringing an image of what a forest could look like in the city. That is like an homage to Pipeline and our beautiful waves that we have here.”
The 55-foot-tall mural is expected to be completed by Sunday, May 31.
After this project, Kaulukukui will start an ocean-themed mural just one street over, bringing a bit more nature into urban Honolulu.
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