Grease Trap Regulations in Hawaii

Overview

Hawaii food businesses must follow FOG pretreatment rules. The Hawaii Department of Health Clean Water Branch sets state rules. County wastewater utilities run the day-to-day work. The Clean Water Branch protects the health of residents and tourists who use Hawaii's coastal and inland waters. It enforces the rules through permits, monitoring, and inspections.

Hawaii's marine ecosystems are sensitive and sewer systems are limited. That makes strict FOG compliance extra important for water quality.

Governing Authorities

FOG rules in Hawaii run through several layers:

• Hawaii Department of Health Clean Water Branch — runs state-level NPDES permits and water quality standards. The Hawaii Department of Health issues all non-federal ocean water permits.
• City and County of Honolulu Department of Environmental Services — runs wastewater plants that treat 96 million gallons a day. It enforces FOG rules through its Environmental Quality division.
• County of Maui Wastewater Reclamation Division — runs Chapter 14.21A General Pretreatment Regulations for grease traps and discharge permits.
• Hawaii County Department of Environmental Management Wastewater Division — treats 5 million gallons of wastewater per day.
• County of Kauai Wastewater Management Division — protects public health by running wastewater systems in Waimea, Eleele, Hanapepe, Lihue, Hanamaulu, Wailua, and Kapaa.

Key Requirements

Hawaii FOG rules vary by county but share common parts:

• Grease Interceptor Installation: All users must install and maintain a trap to separate and hold liquid waste with fats, oils, or grease.
• Pumping Frequency: Routine pumping is required every 90 days in Honolulu. Timing depends on site type and volume. The 25% rule applies. Traps must be cleaned before grease hits 25% of capacity.
• Certified Hauler Use: All FOG waste must be removed by licensed, permitted haulers and taken to approved sites.
• Record Retention: Each site must keep a service log of every trap pumping for the past twelve months. The log must show date, time, amount pumped, hauler, and disposal site. In Honolulu, three-year records are standard.
• Best Management Practices: Sites must keep written operation plans to show traps work as built. Plans should include kitchen practices that cut grease entering drains.
• Wastewater Discharge Permits: No food business can put process wastewater into the public sewer without a wastewater discharge permit.
• Interceptor Sizing: County authorities must approve trap sizing. Sizing is based on fixture units, flow rates, and site type under Uniform Plumbing Code rules.

Fines and Enforcement

Hawaii counties enforce FOG rules with rising penalties:

• Honolulu: Penalties can include permit suspension or loss, service shut-off, and a fine of at least $1,000 per violation per day. For sewer ordinance violations, fines run from $1,000 to $25,000 per violation per day. If the issue continues after notice, each day counts as a separate offense.
• Maui County: Violations bring violation notices, fines, penalties, and civil actions under Chapter 14.21A. Sites that need a trap must finish install within three months of the director's notice. Faster compliance is required for sites that cause main line blockages.
• Enforcement Mechanisms: County enforcement teams check compliance through site inspections and complaint reviews. They require fixes through orders or court action.
• Compliance Inspections: Surprise inspections check service records and trap condition. Poor trap upkeep can lead to cleanup cost recovery if blockages happen.

Major City FOG Programs

Honolulu (City and County of Honolulu)

Honolulu's Department of Environmental Services treats 96 million gallons of wastewater daily. It also collects trash and green waste across Oahu. The FOG Control Program requires all food businesses to install grease traps that meet city sizing rules. The Grease Interceptor Compliance Program keeps grease out of the sewer system. Without it, grease builds up in lines and causes backups and spills. Routine pumping every 90 days is standard. Sites must use certified haulers and keep three years of service records. Plan review and permit approval through the Department of Environmental Services Regulatory Control Branch are required before install.

Maui County (Wailuku, Kahului, Kihei, Lahaina)

Maui County runs under Chapter 14.21A General Pretreatment Regulations. The chapter sets rules for permits, discharge standards, monitoring, and fines. All food sites that send wastewater to county plants must get a Wastewater Discharge Permit. Food sites are Class IV dischargers. Permits are usually issued within a week if the paperwork is complete. They are good for two years. The county provides detailed grease trap sizing rules by site type. Sites must submit plans to the Wastewater Reclamation Division before construction starts.

Hawaii County (Hilo and Kona)

Hawaii County's Wastewater Division treats 5 million gallons of wastewater per day. It cleans and inspects about 20 miles of sewer lines each year. The county is rolling out a FOG and pretreatment program required by the NPDES permit for the Hilo treatment plant. The program will help the whole island by fixing operational and regulatory issues. It targets food businesses in sewered areas, including Hilo, Kona, and nearby communities. Hawaii County is also building the legal authority to enforce compliance as part of EPA-required wastewater upgrades.

Kauai County

The Kauai Wastewater Management Division protects public health and the environment by running wastewater systems. The county runs sewer systems in Waimea, Eleele, Hanapepe, Lihue, Hanamaulu, and along Kuhio Highway in the Wailua and Kapaa corridor. Food businesses in these areas must meet county wastewater rules, including grease trap install and upkeep. FOG program details are run through the Wastewater Management Division's Administration and Engineering Program.

Frequently Asked Questions

How often must I have my grease trap pumped in Hawaii?

Pumping timing varies by county and site. In Honolulu, the standard is every 90 days. Busy spots may need more frequent service. All Hawaii counties follow the 25% rule. Traps must be cleaned before grease hits 25% of trap capacity. Routine checks help set the right schedule for your site. Always use a county-permitted hauler and keep detailed service records.

What records must I keep for FOG compliance?

Hawaii food businesses must keep full service logs for each trap pumping. Records must show the date, time, amount pumped, hauler name and permit number, and disposal site. Honolulu requires three-year records. Maui County requires at least 12 months of pumping records. Logs must stay on-site in a clear spot. They must be ready right away when health or wastewater inspectors ask during compliance checks.

Do I need a permit to operate a grease interceptor in Hawaii?

Yes. All Hawaii counties require food businesses to get wastewater discharge permits before opening. In Maui County, food sites need a Class IV Wastewater Discharge Permit good for two years. Honolulu requires permits through the Department of Environmental Services. Before install, you must submit plans for county wastewater review and approval. Plan review checks proper sizing, location, and code compliance. Running without a valid permit can bring fines starting at $1,000 per day and possible sewer shut-off.

Find Grease Trap Service in Hawaii

Reliable, certified grease trap service is key for Hawaii food businesses. Our directory lists 16 qualified providers across the Hawaiian Islands, from Honolulu to Hilo and everywhere in between. These licensed pros know Hawaii's FOG rules. They work with county-permitted haulers and provide the records you need for compliance checks. Visit our Hawaii grease trap service directory to connect with experienced providers in your area who can keep your business compliant and your drains clear.