Protecting Hawaiʻi's Land & Water for Future Generations
Serving the Kona Corridor with professional IWS design, cesspool conversion, and environmental site planning, from the initial evaluation through final DOH certification. One engineer, working directly with you.
"I put down roots in this community because I wanted to be closer to family and friends, and to do work that matters to the people around me. When I help a Kona property owner take care of their wastewater, it isn't just professional service; it's one neighbor looking out for another, and for all the generations who will call this island home after us."
— Matthew Jaroslawski, PE, Founder, Engineered Septic Solutions, Holualoa, Hawaiʻi
Meet Matthew →Every project managed by a licensed PE who handles the DOH permitting process on your behalf, from the first site visit to the final approval letter.
An Individual Wastewater System (IWS) is Hawaii's term for an engineered on-site septic or aerobic treatment system. Whether building a new home or developing commercial property, a licensed PE must design and permit your IWS with the State DOH Wastewater Branch.
Under Hawaii Act 125 (2017), codified in HRS §342D-72, requires every cesspool in the state to be upgraded by January 1, 2050. Cesspools discharge untreated waste directly into the soil with zero treatment, threatening the drinking water aquifers and nearshore reefs our community depends on.
Converting your cesspool is one of the most meaningful environmental contributions a Kona property owner can make.
More Services
Service 03
Professional perc testing per HAR Chapter 11-62, Appendix C. Required for all new IWS designs.
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Service 04
On-site inspections and obtainment of the DOH Approval to Use letter for your completed system.
Learn More →Under HRS §342D-72, every cesspool in the state must be upgraded to an Individual Wastewater System or connected to sewer. This requirement is not just a legal obligation; it is a responsibility to our community and our island.
Matthew manages all DOH permitting, design, and construction oversight.
When you work with ESS, you're working with a neighbor. Someone who lives in this community, whose family and friends depend on the same water table, and who has a personal stake in getting your project right. There are no project managers or hand-offs here. When you have a question, you speak directly with Matthew.
Submit your project inquiry. Matthew reviews your property details and follows up within 3–5 business days.
Matthew visits your property to assess topography, soil, groundwater, setbacks, and feasibility, then recommends the right IWS for your site.
Matthew prepares complete PE-stamped design plans and manages all DOH Wastewater Branch communications, responding to comments, tracking status, and securing plan approval.
Matthew inspects the completed installation and files the final Construction Inspection Report. Once DOH issues your Approval to Use letter, your IWS is certified.
Matthew Jaroslawski is a licensed Professional Engineer with over 12 years of dedicated wastewater engineering experience, spanning collection systems, treatment infrastructure, and individual wastewater system design across multiple states.
Based in Holualoa on the Big Island, Matthew founded Engineered Septic Solutions to bring PE-stamped IWS engineering directly to the Kona community, without the hand-offs or delays that come with a larger firm.
"I'm not here to close a deal and move on. I'm here to serve my family, friends, and community, and do work that I'm proud to leave behind. When your system is certified and your water is clean, that matters to me, not just professionally, but as your neighbor."
Matthew lives in this community alongside his family and friends. He plans to be in Kona for a long time. Reach out and he will follow up personally within 3–5 business days, ready to talk through your project and find the right path forward.
Matthew is a neighbor in this community, not just a service provider. Whether you're planning new construction, navigating a cesspool conversion, or just starting to understand your options, reach out. This is exactly the kind of conversation he is here for.
No commitment required. Matthew lives here and plans to for a long time. There is no pressure to decide anything quickly. The inquiry form simply helps him understand your situation before he follows up, so your first conversation is useful from the start.
