Sustainable Environmental Management, LLC

What Sustainable Environmental Management, LLC does

Sustainable Environmental Management, LLC (SEM) was a privately held waste and recycling hauling company headquartered at 755 Governor Lea Road, New Castle, Delaware. Founded in 2016, SEM operated for nearly 10 years as a regional collection service provider serving residential and commercial customers across Delaware, Pennsylvania, and Maryland, including municipalities such as Wilmington, Newark, Dover, Bear, Brookhaven, Avondale, and West Chester. The company was acquired by Casella Waste Systems, Inc. (NASDAQ: CWST) effective June 2, 2025, and is no longer operating as an independent entity.

SEM's service portfolio covered the full spectrum of solid waste and recycling operations: scheduled curbside waste collection for households and businesses, single-stream recycling, food waste and mattress recycling, organics management with Earthlife soil products, roll-off dumpster rental for construction and remediation, special waste handling, and a CNG-powered collection fleet. Supporting offerings included the FoodCycler home food-waste appliance, the Recycle Better educational program, and consulting/professional services for municipalities and businesses. Customer billing was managed through a KUBRA payment portal supporting ACH, credit card, autopay, and multi-account linking.

SEM's go-to-market was fleet-based direct collection with local drivers, serving a horizontally segmented mix of residential and commercial customers with no publicly disclosed pricing. Revenue, headcount, certifications, and management team details were not disclosed. The acquisition by Casella was framed as a customer-service and continuity-driven exit, with Casella retaining the same drivers, routes, and rates during transition.

Name

Sustainable Environmental Management, LLC

Legal name

Sustainable Environmental Management, LLC

Website

https://semwaste.com

Company type

Private

Operating status

Acquired

Headcount range

11–50 employees

Short description

Sustainable Environmental Management, LLC was a privately held waste and recycling hauling company serving residential and commercial customers across Delaware, Pennsylvania, and Maryland, acquired by Casella Waste Systems in June 2025.

Ownership category

akta.pro rank

Product category

Solid Waste & Recycling Services

NAICS

Waste Collection (56211), Other Waste Collection (562119), Hazardous Waste Treatment and Disposal (562211)

SIC

Refuse Systems (4953), Sanitary Services (4950)

akta.pro primary industry

Municipal Solid Waste Collection (Residential/Commercial) (IMAIAFAA)

akta.pro secondary industry

Commercial & Institutional MSW Collection (BPALAAAB)

Keywords

• Waste collection services
• Recycling services
• Organics management
• Roll-off dumpster rental
• Solid waste hauling

Headquarters

HQ city

New Castle

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales, Technology or R&D

Distribution channels1 record

Core offering

Sustainable Environmental Management, LLC (SEM) was a waste and recycling service provider operating scheduled curbside and commercial collection routes across Delaware, Pennsylvania, and Maryland. The company collected residential, commercial, and industrial waste and recyclables, including single-stream recycling, food waste recycling, and mattress recycling, and offered roll-off dumpster rental, special waste handling, and organics management services. SEM also operated a CNG-powered collection fleet and supported customers through a KUBRA-hosted payment portal.

Product overview

This is a waste and recycling management company offering a comprehensive suite of collection, disposal, and sustainability services. The core offerings include residential, commercial, and industrial waste collection; comprehensive recycling programs (including food waste, mattress recycling, and single-stream); organics management with Earthlife soil products; dumpster rental; special waste handling; and CNG-powered collection fleet. Educational programs like Recycle Better and products like FoodCycler complement the service portfolio. The company operates landfills and transfer stations, and provides professional consulting services for municipalities and businesses.

Differentiator

Problem solved

Functional benefit

Products and services

• Waste Collection Services Scheduled curbside and on-call collection services for residential, commercial, and industrial waste materials, including transportation of waste to disposal facilities. Targeted at households and businesses in Delaware, Pennsylvania, and Maryland.
• Recycling Services Comprehensive recycling programs including single-stream recycling, food waste recycling, and mattress recycling designed to divert materials from landfills. Targeted at residential and commercial customers across the Mid-Atlantic region.
• Organics Management Organics collection and processing services including food waste recycling and Earthlife products for soil enhancement. Targeted at residential, commercial, and agricultural customers.
• Dumpster Rental Roll-off dumpster rental services for construction, remediation, and temporary waste management needs. Targeted at contractors, developers, and businesses with project-based waste requirements.
• Special Waste Services Handling and disposal of special waste materials requiring specialized processing or compliance measures. Targeted at businesses and municipalities with non-standard waste streams.
• Professional Services Consulting and professional waste management services for businesses and municipalities. Targeted at organizations needing expert guidance on waste strategy and compliance.
• Compressed Natural Gas Collection Fleet Collection services delivered via a fleet of vehicles powered by compressed natural gas (CNG) for environmentally conscious waste collection operations. Targeted at customers prioritizing lower-emission waste hauling.
• FoodCycler By Casella Home food waste recycling appliance that processes food scraps into nutrient-rich material for gardens. Targeted at residential households seeking on-site food waste reduction.
• Earthlife Products Organics-derived soil products for landscaping and agricultural applications. Targeted at landscapers, gardeners, and agricultural customers.

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Partnerships

One partnership is on record.

• Casella Waste Systems, Inc.coreStrategic or Co-development Partner · 2 June 2025Casella acquired Sustainable Environmental Management (SEM) as of June 2, 2025. SEM's customer base and service operations were transitioned to Casella, with Casella becoming the new service provider for all SEM customers. The acquisition was described as SEM's choice because Casella places high value on customer service and has strong commitment to local communities. SEM had operated for nearly 10 years before this transition.

Scale indicators2 records

Recent moves4 records

Expansion highlights3 records

Market position

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/sem-waste

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sustainable Environmental Management, LLC