TideClaw
Real-time water quality monitoring for coastal towns
Solar-powered sensor buoys that give coastal towns continuous water-quality data in every season.
A Seaside Labs project, designed in Wareham, Massachusetts. Proposed first site: Swifts Beach, Wareham. Designed for municipal harbormasters, conservation groups, and shellfish associations.
Continuous water-quality data for coastal towns
Most coastal communities rely on summer volunteer sampling — weekly spot-checks for bacteria during beach season. From October through April, most locations have no water quality data at all.
TideClaw changes that. A solar-powered sensor buoy takes 15-minute readings of dissolved oxygen, pH, temperature, and turbidity in every season, with readings published to a public web page once the buoy is deployed. It catches the overnight oxygen crashes, the nutrient spikes, and the early algae bloom signals that weekly sampling misses.
What TideClaw monitors
- Dissolved oxygen — the primary indicator of ecosystem health. Crashes signal blooms, nutrient overload, and fish kills
- pH levels — shifts reveal active photosynthesis from algae blooms and acidification trends
- Temperature — warm water drives bloom growth. Critical for predictive early warning
- Turbidity — water clarity drops when blooms are dense. Replaces manual Secchi-disk readings
- 15-minute intervals — continuous data rather than weekly snapshots
- Algae bloom detection — the combination of dissolved oxygen, pH, and turbidity trends can indicate a developing bloom
At a glance.
Shellfish beds, swimming beaches, marinas, and marshes, most of which have no continuous monitoring today.
Most volunteer sampling programs stop in October and resume in May. Nutrient loading and low-oxygen events continue through the winter.
Continuous readings catch the overnight and between-sampling events that weekly spot-checks miss.
Dissolved oxygen, pH, temperature, and turbidity, published to a public web page once deployed.
Early warning for harmful algae blooms
Harmful algae blooms are a growing threat to Buzzards Bay and coastal communities across New England. Warming waters, nutrient runoff, and aging septic systems are making blooms more frequent and more toxic. Continuous readings can show a bloom developing before it is visible.
Spikes during photosynthesis, crashes overnight
A bloom's daily oxygen cycle is visible in continuous data and missed by weekly samples.
Active bloom metabolism shifts the water's chemistry
Sustained pH climb is one of the earliest chemical signals a bloom is building — often days before it's visible.
Water clarity drops as blooms grow dense
Turbidity trends over a few days tell you whether a bloom is forming, holding, or clearing.
For permanent stations, a professional multiparameter sonde adds chlorophyll-a and phycocyanin sensors for direct measurement of algae biomass and cyanobacteria.
A prototype first, then permanent stations.
Step 1. A prototype buoy — low-cost open hardware, four sensors, solar-powered — that can be deployed within weeks. It collects 90 days of continuous readings to validate accuracy and support grant applications.
Step 2. A professional-grade monitoring station with laboratory-comparable accuracy, six- to nine-month maintenance cycles, and optional chlorophyll-a sensors for direct algae detection. Permanent stations would be funded through monitoring grants.
What a permanent station adds
- Laboratory-comparable sensors for regulatory-grade readings
- Six- to nine-month maintenance cycles
- Optional chlorophyll-a and phycocyanin sensing for direct algae detection
Swifts Beach, Wareham MA
Swifts Beach on Buzzards Bay is the proposed site for the first buoy, a community directly affected by water-quality changes and harmful algae blooms. With a partner and funding in place, 90 days of continuous readings would support the case for permanent stations.
The plan
One prototype buoy at Swifts Beach, validated against existing monitoring data. If the validation holds up, it supports additional buoys and scientific review with local environmental organizations.
Three ways to help launch TideClaw.
The first buoy needs a site, a partner, and funding.
Host a deployment
A municipality, watershed group, shellfish commission, or nonprofit that can anchor a single-beach or single-harbor deployment.
Co-apply with us
An eligible 501(c)(3), tribe, estuary program, or academic partner who wants to lead a monitoring grant application.
Fund the first buoy
An investor, family office, marina group, waterfront business, or environmental backer who wants to fund the first deployment.
The prototype hardware costs about $550. Ninety days of continuous readings would support a multi-site grant application.
Contact
Tell us about your community or waterway and how you would like to be involved. We reply directly.
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