Explore public data
Read water-quality measurements, monitoring dates, units, and linked scientific sources in a clearer format.
What do these numbers mean? →Rivistry · Public river water quality
Rivistrymakes river water understandable.
Explore official monitoring data, find rivers near you, and help track changing conditions — no account required.
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About Rivistry
What Rivistry does
Rivistry combines public environmental data with carefully reviewed community observations. It is an educational and informational resource—not an official swimming-safety or emergency-alert service.
Find nearby rivers
Search by place and discover rivers and watersheds near your community rather than needing an exact river name.
Share observations
Contribute photos of wildlife, algae, erosion, litter, or changing conditions. AI offers a suggestion and submissions are reviewed before publication.
What the numbers reveal
Water quality is a
connected system.
No single number tells the whole story. The composite score on the map above is one useful signal — Rivistry breaks it down into three measure categories below, so seasonal patterns and differences between locations are easier to see.
Nutrients
Follow what feeds growth.
Phosphorus and nitrogen help explain algae, plant growth, and changing conditions across a watershed.Aquatic life
See how a river breathes.
Dissolved oxygen and temperature reveal the conditions fish and other organisms experience.River chemistry
Read the water’s signature.
pH, conductivity, and suspended solids show how geology, roads, weather, and communities shape the river.Built on public science
Each dashboard keeps measurements connected to the organization, station, sampling date, unit, and published source.
Explore rivers
From your townto its river.
Choose a state, narrow to a region or watershed, and select a river to open its monitoring dashboard.
Open river finder →1
StateMA · CT · NH
✓2
RegionChoose a watershed
→3
RiverOpen the data
→A few rivers to explore
Recommended rivers.
Massachusetts
Sudbury River
Explore public water-quality data, monitoring context, and recent river highlights for the Sudbury River in Massachusetts.
Open dashboard →MassachusettsConnecticut River
Explore the Connecticut River through western Massachusetts with public monitoring context and river science explanations.
Open dashboard →MassachusettsCharles River
Explore water-quality context for the Charles River from the western suburbs through Boston Harbor.
Open dashboard →MassachusettsMerrimack River
Follow the Merrimack River across northeastern Massachusetts and explore its monitoring context.
Open dashboard →MassachusettsAssabet River
Follow the Assabet River through central Massachusetts with Rivistry's public monitoring summaries and river science context.
Open dashboard →MassachusettsConcord River
Explore the Concord River and learn how public measurements help explain changing conditions across the watershed.
Open dashboard →MassachusettsHousatonic River
Explore Housatonic River monitoring context from the Berkshires to the Connecticut border.
Open dashboard →New · Community observations
Your camera can help
tell the river’s story.
Upload a wildlife, plant, water-condition, or cleanup photo. AI offers a careful first suggestion, and every contribution waits for review.
Share a sighting →◎
Possible identificationGreat blue heronAI suggestion · confirm before saving
Review →