What Esi Environmental Services does

ESI Environmental Services Inc. is a US-based specialty services company headquartered in Gilford, New Hampshire, providing post-construction stormwater management and maintenance to property owners and industrial clients across the Northeast and Mid-Atlantic United States. The company deploys self-performing field crews to deliver a comprehensive service portfolio that includes industrial vacuumation (vactor), high-pressure jetting, sediment cleaning, water quality testing, CCTV underground pipe inspections, hydro excavation, and confined space entry services. ESI addresses regulatory compliance obligations such as NPDES permit support, stormwater credit optimization, and non-compliance resolution, and offers engineering, preventative maintenance programs, corrective repairs, and rehabilitation/retrofit work for both above-ground assets (retention and detention ponds, grassed swales, rip rap, green infrastructure) and below-ground infrastructure (storm sewers, vaults, catch basins, dry wells).

The company's underlying technology stack is physical and operational rather than software-based: high-pressure jetting equipment, industrial vacuumation trucks, hydro-excavation rigs, CCTV pipe inspection systems, and water quality testing instrumentation operated by certified technicians. Differentiated capabilities include non-invasive infrastructure cleaning, certified confined-space expertise, and a vertically integrated self-perform delivery model that avoids subcontractor layering. The full service surface under ESI's banner also extends into green infrastructure installation (bioretention, permeable pavement, native landscaping, regenerative stormwater conveyance), planning and permitting engineering, and stormwater credit trading support.

ESI operates on a professional services, quote-based revenue model: pricing is not publicly disclosed and engagements are scoped through direct consultation. Go-to-market is enterprise field sales targeting single-site and multi-site property owners, complemented by industrial clients requiring specialized cleaning and sediment management. Marketing channels are predominantly bottom-of-funnel direct consultation requests and a published phone line, supplemented by content assets (case studies, whitepapers, blogs, webinars) inherited from parent AQUALIS. In June 2021, ESI was acquired by AQUALIS, a nationwide provider of stormwater and lift station management services that serves retail, commercial, industrial, municipal, and governmental end-markets; ESI now operates as a wholly-owned subsidiary, with the same professional and certified team continuing to serve customers under the AQUALIS brand.

Name

Esi Environmental Services

Legal name

ESI Environmental Services Inc.

Website

https://esi-team.com

Company type

Private

Founded year

1997

Operating status

Acquired

Headcount range

11–50 employees

Short description

ESI Environmental Services provides post-construction stormwater maintenance and management services to property owners and industrial clients across the Northeast and Mid-Atlantic US, operating as a wholly-owned subsidiary of AQUALIS since June 2021.

Ownership category

akta.pro rank

Product category

Stormwater Management Services

NAICS

Environmental Consulting Services (541620)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Stormwater Drainage Network Operations & Maintenance (Cleaning, CCTV, Jetting) (EUANAEAB)

akta.pro secondary industries

Stormwater Collection & Conveyance (Inlets, Catch Basins, Pipes, Channels) (EUANAEAA), Natural Disaster Preparedness & Recovery (Storm/Flood/Wildfire) (BPABANAI)

Keywords

• Stormwater management services
• Industrial vacuumation services
• Underground pipe inspection
• Water quality testing
• Environmental compliance consulting

Headquarters

HQ city

Gilford

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Stormwater Management Services: Comprehensive post-construction stormwater management services including preventative maintenance programs, corrective maintenance, repairs, rehabilitation and retrofits, engineering services, compliance consultations, stormwater credits, inspections, and industrial vacuum and jetting services

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Esi Environmental Services provides post-construction stormwater management services for single-site and multi-site property owners across the Northeast and Mid-Atlantic United States. Self-performing crews deliver industrial vacuumation, high-pressure jetting, sediment cleaning, water quality testing, CCTV pipe inspections, hydro excavation, preventative maintenance programs, corrective repairs and rehabilitation, engineering services, compliance consulting, stormwater credits, confined space entry, and green infrastructure solutions covering both above-ground and below-ground stormwater assets.

Product overview

ESI Environmental Services provides a comprehensive suite of stormwater management services to the greater Northeast and Mid-Atlantic regions. The company operates as a service-oriented business with self-performing crews offering industrial vacuumation (vac), jetting, sediment cleaning, water quality testing, CCTV pipe inspections, hydro excavation, and stormwater system maintenance and repairs. Services span preventative maintenance programs, corrective repairs and rehabilitation, engineering services, compliance consulting, stormwater credits, inspections, and green infrastructure solutions. In June 2021, ESI was acquired by AQUALIS, strengthening geographic coverage while maintaining the same professional and certified team.

Differentiator

Problem solved

Functional benefit

Products and services

• Industrial Vacuumation (Vac) Services Self-performing industrial vacuumation services for non-invasive cleaning of underground stormwater infrastructure, provided to property owners and industrial clients.
• Jetting Services High-pressure water jetting services for cleaning and maintaining stormwater infrastructure and underground pipes.
• Sediment Cleaning Services Professional sediment cleaning services for stormwater control measures (SCMs) and infrastructure maintenance.
• Water Quality Testing Comprehensive water quality testing services for stormwater, wastewater, drinking water, and industrial applications.
• CCTV Pipe Inspections Underground video pipe inspection services using closed-circuit television technology to assess pipe conditions.
• Stormwater Preventative Maintenance Comprehensive preventative maintenance programs for single-site or multi-site property owners to maintain post-construction stormwater management systems.
• Stormwater System Repairs & Rehabilitation Corrective maintenance including repairs, rehabilitation, and retrofits for stormwater infrastructure including sinkholes, pond management, erosion control, and pipe failure repairs.
• Stormwater Engineering Services Engineering services including planning, analysis, evaluation, sustainable design, permitting, and flood management for stormwater systems.
• Compliance and Consulting Compliance consulting including permit review, regulatory requirement assessments, inspection and audit support, and NPDES permit compliance.
• Hydro Excavation Non-invasive hydro excavation services using high-pressure water and vacuum technology for safe digging and infrastructure exposure.
• Stormwater Credits Stormwater credit management services to help property owners with credit acquisition and optimization.
• Confined Space Entry Services Specialized confined space entry services for inspection and maintenance of stormwater infrastructure.
• Green Infrastructure Services Green stormwater infrastructure solutions including bioretention cells, permeable pavement, native landscaping, and regenerative stormwater conveyance.

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• AQUALIScoreStrategic or Co-development Partner · 1 June 2021In June 2021, AQUALIS acquired ESI Environmental Services Inc., headquartered in Gilford, NH. This acquisition strengthened AQUALIS's geographic coverage and regional density to further support the greater Northeast and Mid-Atlantic markets. The same professional and certified team continues to serve customers now under the AQUALIS brand.

Scale indicators1 record

Recent moves3 records

Expansion highlights4 records

Direct peers

• Apex Companies: National environmental consulting and field services firm offering stormwater compliance, industrial services, and water-related field operations across multiple US regions — directly comparable to ESI in service mix (inspections, maintenance, compliance) and customer base (commercial, industrial, municipal).
• Montrose Environmental Group: Public environmental services company providing air, water, and stormwater testing, inspection, and compliance services to commercial, industrial and government clients — overlapping with ESI in water quality testing, stormwater inspections, and regulatory compliance consulting.
• Hydro International: Provider of stormwater treatment products, hydrodynamic separation systems, and associated maintenance services for stormwater control measures — comparable to ESI as a specialist in stormwater asset performance, particularly in green/sustainable stormwater infrastructure.

Broad incumbents

• Tetra Tech: Large global engineering and environmental consulting firm with significant US municipal water and stormwater practice. Comparable to ESI at the consulting, engineering, and permitting end of the value chain, though operating at much broader scale and across many end markets.
• Veolia North America: Major water, wastewater and environmental services operator in the US serving municipal, commercial and industrial customers. Comparable to ESI as a large-scale operator of water/stormwater infrastructure services, though at significantly broader geographic and service scope.
• Brown and Caldwell: Environmental engineering and consulting firm focused on water, wastewater and stormwater infrastructure for municipalities and utilities. Comparable to ESI's engineering services, permitting support, and infrastructure rehabilitation offerings, with a stronger municipal/government tilt.
• AQUALIS: Parent company of ESI and the platform through which ESI now operates. AQUALIS is a nationwide provider of stormwater management, lift station services, and water quality testing, making it the most direct broader-portfolio peer and the natural benchmark for ESI's capabilities and geographic reach.

Others

• Advanced Drainage Systems (ADS): Leading manufacturer of stormwater pipe and drainage products used in the same underground infrastructure ESI inspects, cleans and repairs. Adjacent rather than direct — relevant as an enabler/infrastructure supplier to ESI's installed base rather than a service competitor.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/esi-environmental-services-inc-

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 Esi Environmental Services