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Best Grease Trap Cleaning in New Hampshire Ranked
For restaurant owners and food service operators in the Granite State, maintaining a grease trap or interceptor is a critical operational and legal responsibility. Unlike some states with uniform regulations, New Hampshire's approach is highly localized, placing the onus on business owners to understand and comply with their specific town or city's rules. Proper grease trap maintenance prevents costly sewer blockages, avoids significant fines, and ensures your kitchen runs smoothly. This guide outlines the key regulations, best practices, and cost considerations for effective grease interceptor management across New Hampshire.

Felix, A Wind River Company
concord
Felix, A Wind River Company, is a septic, grease trap, and drain cleaning service provider based in Concord, NH. Serving Southeast New Hampshire, they offer residential, commercial, municipal, and industrial services backed by over 40 years of experience. Their team uses advanced tools and technology to handle septic system maintenance, pumping, and complex repairs. Felix is part of Wind River Environmental's Family of Brands and provides real-time reporting to clients. They also offer 24/7 pumping and repair services to meet urgent needs.

Granite State Sewer & Drain Cleaning
4 Candy Ln #10, Hudson, NH 03051
Granite State Sewer & Drain Cleaning is a family- and veteran-owned business serving Nashua, NH, and nearby areas. Since 1988, they have provided residential and commercial drainage solutions, including grease trap cleaning, sewer line services, and septic tank maintenance. Their team specializes in confined space entry and uses advanced camera technology to diagnose and address drainage issues efficiently. The company offers 24/7 emergency services to handle urgent situations at any time.

Maznek Septic Services LLC
manchester
Maznek Septic Services LLC provides comprehensive septic system services in Manchester, NH, and surrounding areas in central and southern New Hampshire. Their offerings include septic pumping, grease trap pumping for commercial clients such as hotels and restaurants, and septic repairs and upgrades like baffle replacement and leach field rejuvenation. The company also employs certified septic evaluators for inspections, camera scans, and system locating to assist with real estate transactions and pre-construction planning. Maznek Septic Services focuses on maintaining septic system health and preventing costly repairs through routine maintenance and expert evaluations.

Souhegan Septic Tank Services LLC
18 Lamy Dr, Goffstown, NH 03045
Souhegan Septic Tank Services LLC is a family-owned and operated business since 1978, providing septic and grease trap cleaning services in Manchester, NH. Their offerings include septic pumping and cleaning, line unclogging and jetting, catch basin cleaning, grease trap cleaning, and hydro excavation. They also provide specialized services such as camera inspection, pipe relining, and pipe thawing. The company serves a wide range of towns around Manchester, ensuring comprehensive coverage in the region.

Lake’s Septic Service LLC
concord
Lake's Septic Service LLC is a licensed and insured provider of septic system services based in Concord, NH. They serve homeowners and businesses in several nearby communities, including Andover, New London, Wilmot, Danbury, Bristol, Hill, Salisbury, and Warner. Their services cover residential and commercial septic pumping, system installations and replacements, repairs, grease trap pumping, emergency calls, and effluent pump replacements. The company draws on extensive field experience and knowledge of local soil conditions and septic regulations to deliver effective solutions.
Understanding New Hampshire's Localized Regulatory Landscape
In New Hampshire, there is no single, statewide grease trap cleaning statute. Instead, authority is delegated to municipalities, each with its own Public Works Department, Health Department, or Sewer Division that enforces a Fats, Oils, and Greases (FOG) program 1 2. This means the requirements in Manchester, Concord, or Nashua can differ from those in Seabrook, Portsmouth, or a smaller town.
The first and most crucial step for any food service business is to contact your local municipal authority. They will provide the specific ordinance that applies to your property. Typically, these local regulations mandate the installation of an approved grease removal device (GRD), which includes both indoor grease traps and larger outdoor grease interceptors 3 4. The city or town must often approve the design and minimum size of your trap during the permitting process for a new establishment or a renovation 1 4.
Key Cleaning Rules and Frequency Requirements
While local rules vary, they generally build upon a common industry standard. Understanding these core principles will help you navigate your specific requirements.
- The 25% Rule: This is the universal benchmark for cleaning. A grease trap should be pumped out when the combined volume of fats, oils, greases (FOG) and settled solids reaches 25% of the trap's total liquid capacity 1 5. Exceeding this level drastically reduces the trap's efficiency, allowing grease to pass into the sewer lines.
- Mandatory Minimum Schedules: Many municipalities set a maximum time between cleanings, regardless of the 25% measurement. It is very common for local codes to require service every 30 to 90 days 1 3. High-volume kitchens, such as those in busy restaurants or institutional cafeterias, will almost always need monthly service to stay compliant and functional.
- Local Examples: For instance, the town of Seabrook mandates a minimum monthly cleaning schedule for grease traps, making the date on the calendar as important as the trap's fill level 6 7.
- Documentation is Mandatory: Simply having the service performed is not enough. You are required to keep detailed records, often called manifests or service reports, from your licensed pumping provider. Many towns now require or accept digital copies of these records 1 8. These documents are your primary proof of compliance during a health or sewer department inspection.
Signs Your Grease Trap Needs Immediate Attention
Waiting for a scheduled pump-out can be risky. Be proactive and watch for these warning signs that indicate your trap needs service ahead of schedule:
- Slow Draining: Sinks, especially prep and dish sinks, that drain slowly are a primary indicator that the trap is nearing or at capacity 8.
- Foul Odors: Persistent, unpleasant smells emanating from drains or near the trap location signal a buildup of decomposing organic matter.
- Pest Activity: An increase in flies, gnats, or other pests around floor drains or the kitchen can be linked to grease trap contents.
- Visible Grease or Backup: Any visible grease in downstream drains or, in severe cases, sewage backup is a clear emergency.
- Inspector Notification: If a municipal inspector warns you about grease trap issues, immediate action is required to avoid fines 9.
Cost of Grease Trap Cleaning Services in New Hampshire
The cost for professional grease trap pumping in New Hampshire depends on several factors: the size and type of trap, its location (indoor vs. outdoor), your geographic area, and the service urgency.
- Standard Pumping (Indoor Traps): For a typical indoor grease trap, routine pumping costs generally range from $250 to $400 per service 10 11. This is the expected cost for a scheduled maintenance visit.
- Outdoor Grease Interceptors: Larger in-ground outdoor interceptors cost more to service due to their size and the equipment required. Prices for these units can range from $325 to over $1,000 per pump-out 11 12.
- Emergency Service: If you require service outside of normal business hours or for an urgent blockage, expect to pay a premium. Emergency grease trap cleaning can cost between $800 and $1,200 or more 10 13. Proactive, scheduled maintenance is the most cost-effective strategy.
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A Step-by-Step Compliance Plan for NH Businesses
To ensure you meet all legal and operational requirements, follow this practical plan:
- Identify Your Local Ordinance: Find the contact information for your town's Public Works or Sewer Department. Request a copy of the FOG control ordinance and any specific requirements for your business type 1 2.
- Verify Trap Approval: Ensure your existing grease trap or interceptor was installed with municipal approval. If you are planning a new installation, submit design plans for approval before work begins 4.
- Select a Licensed Provider: Hire a reputable, licensed grease trap pumping company familiar with your area's regulations. Companies like B.H. Cameron and Service Pumping & Drain Co. service New Hampshire and understand local documentation needs 1 14.
- Establish a Proactive Schedule: Work with your provider to set a pumping schedule that meets or exceeds your town's minimum requirement (e.g., every 30, 60, or 90 days). Adjust this schedule based on your actual kitchen volume and the observed fill rate of your trap.
- Maintain Impeccable Records: File every service manifest digitally and/or physically. Create a dedicated logbook or folder. This record-keeping is not just bureaucratic; it is your legal shield during inspections and is often required for permit renewals 8 2.
- Train Your Staff: Educate kitchen staff on best practices for minimizing FOG discharge. This includes scraping plates into trash bins, using sink strainers, and avoiding pouring grease down any drain.
Consequences of Non-Compliance
Failing to properly maintain your grease trap has serious repercussions. Municipalities can issue significant fines for violations, which escalate for repeat offenses 1. More critically, grease that escapes into the public sewer system can cause blockages, leading to sanitary sewer overflows (SSOs). If your business is found to be the source of such an overflow, you can be held liable for the extensive cleanup costs and environmental remediation fees, which can dwarf any routine maintenance expense.
Frequently asked questions
Sources
Footnotes
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Grease Trap Cleaning Services for NH Restaurants and Commercial ... - https://bhcameron.com/2025/06/grease-trap-cleaning-services-for-nh-restaurants-and-commercial-kitchens/ ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8
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FOG (Fats, Oils, & Greases) In Our Sewers | Concord, NH - https://www.concordnh.gov/1356/Fats-Oils-Greases-In-Our-Sewers ↩ ↩2 ↩3
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Restaurant Grease Trap Cleaning FAQs - https://www.mahoneyes.com/restaurant-grease-trap-cleaning-faqs/ ↩ ↩2
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Regulations for Grease Traps in New Hampshire Fat, Oil and ... - https://gsowa.org/wp-content/uploads/2020/01/Gordon_RegulationsGreaseTraps.pdf ↩ ↩2 ↩3
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How Often to Clean a Grease Trap - Wind River Environmental - https://www.wrenvironmental.com/blog/2019/february/how-often-to-clean-a-grease-trap/ ↩
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Sewer Department, Industrial Pretreatment Program - https://seabrooknh.info/wp-content/uploads/faq.pdf ↩
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How to Clean a Grease Trap (and How Often You Should) - https://greaseconnections.com/how-to-clean-a-grease-trap-and-how-often-you-should/ ↩
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Grease Trap Pumping Services | Maznek Septic - https://maznekseptic.com/pumping-services/grease-trap-pumping-services/ ↩ ↩2 ↩3
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Grease Trap Cleaning & Pumping: Your Ultimate Commercial Guide - https://elvisservicecompany.com/news/the-ultimate-guide-to-grease-trap-cleaning-pumping-everything-your-business-needs-to-know/ ↩
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Ultimate Grease Trap Pumping Cost Guide: Essential Money-Saving ... - https://www.texwaywastewater.com/grease-trap-pumping-cost/ ↩ ↩2
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Grease Trap Cleaning in Suncook, NH - Costs 11 / 2025 - Homeyou - https://www.homeyou.com/nh/grease-trap-cleaning-suncook-costs ↩ ↩2
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Grease Traps & Pump-Out Scheduling: Keeping Sewers Happy at Food Festivals - https://www.ticketfairy.com/blog/grease-traps-pump-out-scheduling-keeping-sewers-happy-at-food-festivals ↩
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Grease Trap Pumping Cost vs. Grease Trap Maintenance Cost - https://www.stateindustrial.com/video/cost-comparison-pumping-v-chemicals-to-maintain-a-grease-trap/ ↩
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New Hampshire Grease Trap Cleaning - Service Pumping & Drain Co - https://www.servicepumpingdrain.com/service-areas/new-hampshire/ ↩