Real-Time Algal Bloom
Monitoring & Marine Sensing

Now piloting continuous pond and marine monitoring with science backed by Woods Hole Oceanographic Institution, NSF, NOAA, DOE.

Join Our Freshwater Algal Bloom Pilot Cohort

Partner with us to co-design the future of real-time pond monitoring

What You’ll Do & Get

  • 24/7 Algal Bloom & Water Chemistry Monitoring: We’ll deploy a solar-powered buoy streaming live cyanobacteria and key lake-condition data.

  • Real-Time Alerts & Trend Dashboard: Optional texts/email notifications when blooms are detected plus an easy-to-use website tracking bloom status, seasonal trends, and drivers.

  • Bi-Monthly Science Briefs: Concise, actionable reports from Senior WHOI scientist, Dr. Matt Long.

  • Highly Discounted Two-Year Pilot Partner Rate: $600 / mo (April–November) – no charge during winter months, locked in for both seasons. Subtidal covers over 75% of pilot costs.

  • Your Role: All we ask is that you share feedback to help us refine and improve this service for lake associations and residents.

Broader Marine & Coastal Monitoring

Our buoys thrive in the toughest conditions—and their full feature set can be tailored to any application

  • Rugged, Field-Tested: 18+ months surviving gale-force winds and complete ice cover.

  • Comprehensive Marine Sensing: Monitor waves, currents, wind speed & direction, humidity, temperature, plus water chemistry—scaled down or customized for your needs.

  • Carbon & Growth Metrics for Kelp Farms: Partnering with GreenWave and Schmidt Marine Technology Partners in (Long Island Sound, to measure the carbon sequestration potential of kelp aquaculture and tracked the drivers of healthy kelp growth (nutrient flux, light, temperature).

  • Waquoit Bay Deployment (WBNERR/NOAA): Partnering to pinpoint drivers of marine algal mats, inform local remediation strategies, and validate our marine monitoring technology against gold standard NOAA marine observing stations.

Case Studies & Partners

Real deployments. Real impact.

Waquoit Bay Algal Mats: Waquoit Bay is experiencing widespread algal mat coverage, and local stakeholders are mobilizing to identify and remediate root causes. We’re partnering with WBNERR to pinpoint bloom drivers and inform practical remediation strategies.
Read the Cape News article to learn more »

GreenWave, Long Island Sound: As part of a two-year R&D project in conjunction with GreenWave and Schmidt Marine Technology Partners, we completed 5-week pilot this spring analyzing the total carbon removal potential of GreenWave’s kelp farms and contributors to fertile, productive kelp farms.

Partners

Meet Our Team

At Subtidal, we’re united by our passion for the oceans, regeneration, and data-driven innovation. A proud spinout from the world-renowned Woods Hole Oceanographic Institution, we leverage 20 years of deep expertise from our Co-Founder & Chief Scientific Officer, Dr. Matt H. Long, who pioneered advanced marine carbon and ecosystem monitoring solutions.

  • CO-FOUNDER & CEO

    Casey has spent the last 15 years building startups with a social good. She was formerly COO @ Greener Grazing, where her team was working to eliminate methane in cows through ocean-based Asparagopsis seaweed farming, and was previously Head of Product @ Spire, the first wearable to track mental and physical health via respiratory monitoring. She was named Most Influential Foreigner in China in 2010 for founding China’s first person-to-person microfinance platform, Wokai.

  • CO-FOUNDER & CHIEF SCIENTIFIC OFFICER

    Matt has spent the last 15 years figuring out how to solve hard carbon flux measurement problems in our oceans. Hailing from Woods Hole Oceanographic Institution (WHOI), Matt is a world leader in biogeochemistry, ocean engineering, and fluid dynamics to combine existing technologies to create transformational ocean technologies.