5 Environmental Compliance Firms Worth Knowing in the US

Kenneth Meechai
Written by
Kenneth Meechai
Last edited: Oct 29, 2026

You need an environmental compliance partner who understands regulations and keeps your operations running. Here are five firms worth knowing.

The Environmental Compliance Landscape

Environmental compliance is no longer a back-burner issue. With regulations like RCRA, TSCA, and EPCRA constantly evolving, you need experts who can navigate the complexities. From air quality to hazardous waste, the stakes are high. That's why choosing the right firm matters more than ever.

How We Evaluated These Firms

We looked at service scope, industry experience, client feedback, and regulatory expertise. Each firm brings something unique to the table. Koman stands out with its Alaska Native ownership and focus on sustainability. ECS Limited offers a broad range of environmental services. APTIM brings global reach and integrated solutions. Cedar Corporation excels in municipal and industrial compliance. Fehr Graham provides personalized service across the Midwest.

Here's a quick comparison of the five firms to help you see who does what.

ProviderBest For
ECS LimitedComprehensive environmental services
KomanSustainability-focused compliance
APTIMGlobal environmental solutions
Cedar CorporationMunicipal and industrial compliance
Fehr GrahamLocalized compliance support

A Closer Look at Each Firm

#1 ECS Limited

Screenshot of ECS Limited website A screenshot of the ECS Limited website.

ECS Limited is a powerhouse in environmental compliance, offering a wide array of services from Phase I ESAs to air permitting. They have a strong presence across the US and a reputation for thoroughness. Their team includes experts in geotechnical, materials, and environmental engineering. If you need a one-stop shop for compliance, ECS is a solid choice. They also provide employee training and emergency planning. With decades of experience, they've worked on projects of all sizes.

#2 Koman

Screenshot of Koman website A screenshot of the Koman website.

Koman Eco Services is an SBA-certified 8(a) Alaska Native company, which means they bring diversity and unique perspectives to environmental compliance. They specialize in air quality, stormwater management, and hazardous waste. Their past performance includes work at Offutt Air Force Base, showing they can handle federal contracts. They also offer environmental training and auditing. If you value sustainability and small business partnerships, Koman is worth a look. Their focus on integrated solutions sets them apart.

#3 APTIM

Screenshot of APTIM website A screenshot of the APTIM website.

APTIM is a global leader in environmental and sustainability solutions. They handle everything from remediation to resilience planning. Their compliance consulting services are backed by deep technical expertise. They work with clients in oil and gas, government, and infrastructure. If you need a firm with international reach and innovative approaches, APTIM delivers. They also emphasize safety and quality in every project.

#4 Cedar Corporation

Screenshot of Cedar Corporation website A screenshot of the Cedar Corporation website.

Cedar Corporation is a regional firm with a strong focus on environmental compliance for municipalities and industries. They assist with wastewater sampling, hazardous waste management, and stormwater pollution prevention plans. Their expertise extends to EPCRA reporting and ISO 14001 audits. If you're in the Midwest and need a hands-on partner, Cedar is a great fit. They also offer sustainability planning and environmental training.

#5 Fehr Graham

Screenshot of Fehr Graham website A screenshot of the Fehr Graham website.

Fehr Graham provides environmental compliance services with a personal touch. They serve clients in Iowa, Illinois, and Wisconsin, focusing on regulatory training and safety compliance. Their team helps with wastewater engineering and brownfield redevelopment. If you want a firm that knows the local landscape, Fehr Graham is a smart choice. They combine engineering expertise with environmental know-how.

How to Choose the Right Compliance Partner

Start by defining your needs. Are you dealing with air quality, waste management, or water issues? Look for a firm with direct experience in your industry. Check their certifications and past projects. Consider their location—sometimes local knowledge is key. Don't be afraid to ask for references. And always ensure they understand the latest regulations. A good fit will save you time and headaches.

Streamlining Compliance with Automation

Many firms now use automation to track compliance deadlines and reporting. For example, environmental management systems can help you monitor air emissions and waste disposal. Some firms offer digital tools for training and audits. Ask potential partners about their tech capabilities. Automation can reduce errors and keep you ahead of regulatory changes.

The Bottom Line

Choosing an environmental compliance firm is about trust and expertise. Whether you need a global partner like APTIM or a specialized firm like Koman, do your homework. Each of these five firms has strengths that could align with your goals. Reach out, ask questions, and find the one that feels like a true partner in compliance.

Kenneth Meechai

About the Author

A writer and marketer for over a decade, Kenneth Meechai loves digging deep to find hidden gems on the web. When he's not online, he's usually walking his dogs.