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Clear River Environmental installs I/A OWTS systems to modernize, improve, and replace outdated septic setups. These eco-friendly, code-compliant systems protect groundwater and meet the standards of Long Island. Ideal for both residential and commercial properties across Long Island (Nassau County and Suffolk County).
We guide you through every phase, from permitting and site assessment to installation and final inspections. Whether you’re upgrading a single-family home or a commercial facility, our team ensures your system is installed properly and built to last. Helping you avoid costly fines, environmental issues, and code violations.
EXCELLENT Based on 174 reviews Posted on Bryan McHughTrustindex verifies that the original source of the review is Google. They came right away. Jake had great energy and professionalism. Found my new company!!Posted on Rob Z.Trustindex verifies that the original source of the review is Google. The plumber who was assigned to fix a bad pipe leak in my home was Eddie. He was awesome, inspecting all aspects of what may cause the leak. He fixed the issue in a short amount of time. I absolutely recommend him.Posted on Steve GTrustindex verifies that the original source of the review is Google. Professional friendly excellent service. Highly recommended 👌Posted on Jason PontieriTrustindex verifies that the original source of the review is Google. Clear River was phenomenal. Sewer was backing up, we called Clear River, they had someone on site right away to assess the issue. James was their field representative, very professional, and knowledgeable. He completed the septic system maintenance, backfilled the area and left everything neat and clean. Would highly recommend this company.Posted on Nancy BroderTrustindex verifies that the original source of the review is Google. Clear River just replaced my cesspool and over flow. They did an amazing job! Highly recommend!!Posted on rommel kongTrustindex verifies that the original source of the review is Google. I had an excellent experience with Clear River Environmental Service. This was my first time getting my septic system cleaned since purchasing my home, and I wasn’t sure what to expect. Their technician, Jake, was awesome from start to finish. He was professional, friendly, and incredibly knowledgeable. Jake took the time to answer all my questions and explain how my septic system works in a way that was easy to understand. As a first-time homeowner with a septic, that meant a lot. The service was efficient, thorough, and left me feeling confident about how to properly maintain everything moving forward. Highly recommend Clear River Environmental Service—and especially Jake—for anyone looking for reliable, honest, and top-quality septic service.Posted on Hector ReyesTrustindex verifies that the original source of the review is Google. To say that I am happy with the service provided by Clear River Environmental and the work performed by Jason would be an understatement. i’ve had a historically rocky relationship with plumbers in the past, so it always gives me a bit of anxiety when I have to call one, but from the first conversation with the young lady that called me till the completion of the job this company was professional, communicative, and a pleasure to work with. When there was a slight hiccup, Rob came back out the next day to ensure everything was working properly. That piece of mind is something that is priceless to know that a company stands behind their work Thank you to clear river environmental for the amazing jobPosted on denise raioTrustindex verifies that the original source of the review is Google. Very professional and contacted me by phone prior to arrival. Jake was excellent and answered all my questions regarding the cesspool pumping and chemical application.
Clear River Environmental provides professional I/A OWTS installation services across Long Island, delivering innovative wastewater solutions that meet strict Nassau, Suffolk County and New York State requirements. Our systems are designed to replace outdated cesspools and failing septic systems with advanced treatment technology that protects groundwater, improves water quality, and supports long term property value for homeowners and businesses alike.
From initial site evaluation and system design to permitting, installation, and final inspection, our experienced team manages the entire process with precision and transparency. We work closely with engineers, inspectors, and local authorities to ensure every I/A OWTS installation is compliant, efficient, and built to perform reliably on Long Island soil conditions.
Property owners choose our I/A OWTS services because we focus on real world performance, regulatory compliance, and long term reliability.
With Clear River Environmental, you receive dependable guidance, skilled workmanship, and a wastewater treatment system designed to protect your investment while meeting today’s environmental standards and tomorrow’s regulatory expectations. Our goal is simple, install systems that work correctly, pass inspection, and provide peace of mind for years to come, locally trusted.






Our I/A OWTS units are designed to reduce nitrogen and protect Long Island’s groundwater. With advanced technology and reduced environmental impact, these systems are approved by Suffolk County and meet today’s highest sanitary standards while helping to preserve your property and the local ecosystem for future generations.
All installations are performed by fully licensed, bonded, and insured technicians who specialize in alternative wastewater systems. Our team works closely with Suffolk County health departments to ensure your system meets every code and inspection requirement the first time—no delays, no rework, just results.
We believe in complete pricing transparency. You’ll receive a clear estimate before any work begins, along with a full breakdown of system components, permitting, labor, and testing. No hidden costs, no inflated fees—just honest pricing that reflects the scope of your septic system upgrade.
Not sure if you're eligible for an I/A OWTS system or rebate? We’ll come to your property, assess site conditions, review local code requirements, and provide expert recommendations at no charge. It’s the easiest way to get started without any upfront commitment or pressure to move forward.
Take advantage of available grants and rebates from Suffolk County and NYS. Our team helps you apply for I/A OWTS funding, guiding you through the paperwork and submission process to improve your chances of approval. You could save thousands on your system installation through local incentives.
Every I/A OWTS system we install is chosen for its long-term performance and compatibility with Long Island’s unique soil and drainage conditions. These systems are engineered to withstand heavy seasonal use and are backed by a manufacturer’s warranty and our workmanship guarantee for peace of mind.







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Available 24/7 for emergency calls across Suffolk and Nassau County. Speak with our licensed technicians for real-time updates or to schedule service, repairs, and inspections for your system.
We proudly serve Long Island communities including Huntington, Brookhaven, Smithtown, Riverhead, Islip, and Southampton. Residential and commercial I/A OWTS service specialists near you.
Need help fast? Call us directly or send an email for free estimates, grant guidance, or permit support. Our team responds quickly with expert help and full compliance documentation.