Hawaii Sewage Spills

A sewage spill is an unintentional release of untreated or partially-treated wastewater. Hawaii DOH Clean Water Branch posts a notice with location, estimated volume, cause, and beaches affected.

The risks from direct exposure to spill-affected water:

• Fecal bacteria (enterococcus, E. coli) above the 130 MPN/100mL Beach Action Value
• Pathogens: giardia, cryptosporidium, norovirus, hepatitis A
• Chemical contaminants depending on spill source
• Heightened risk for children, anyone with open cuts, immune-compromised individuals, and pregnant people

The wait time: DOH lifts spill notices after (1) the source is contained AND (2) follow-up water testing shows bacteria below 130 MPN/100mL. That typically takes 3–10 days for a small spill, longer for rain-driven releases. Even after the lift, give the area another day or two and verify visually before swimming.

16 sewage spills have been posted by DOH in the last year. By island:

• O‘ahu: 14 spills
• Kaua‘i: 2 spills

Most spills are rain-driven. Heavy storms overwhelm aging wastewater infrastructure, and Hawaii's roughly 88,000 active cesspools leak under high rain. Hawaii state law requires cesspool conversion by 2050; until then, expect spike events during Kona Low and major storm cycles.

Source: All sewage-spill data on this page is sourced from the Hawaii Department of Health Clean Water Branch. The list above is auto-refreshed weekly from our data pipeline plus a client-side live fetch on every page load. The DOH page is the authoritative live status — link out to it for the official notice on any specific event.