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RivuletCheck

Coimbra

Ribeira das Eiras

Very unhealthy

This water is badly degraded. Based on what neighbours noticed — we are somewhat sure.

5 reports from 3 people

Check this streamBack to the map

Includes demonstration reports while the pilot collects real ones.

One Health

Is it safe for people and animals nearby?

In the last 30 days, residents reported sewage smell (100% of 4 reports, 3 people), algae or scum (52% of 4 reports, 2 people), chemical smell or foam (52% of 4 reports, 2 people), heavy litter (100% of 4 reports, 3 people).

  • People and children

    Avoid contact with the water

    Nearby: Playground 118 m

    • Avoid touching the water and wash hands after being near it, especially children.
    • Keep children out of the water and away from scum at the edge.
    • Avoid skin contact and do not use the water for watering food plants.
    • Watch for glass or sharp objects on the banks.

  • Dogs

    Take care

    No mapped places that bring dogs to the water within 150 m.

    • Keep dogs from drinking or swimming here.
    • Keep dogs out of the water: some algal blooms are toxic to dogs even in small amounts.
    • Keep dogs out of the water and rinse them if they go in.
    • Watch for sharp litter on the banks.

  • Fish and wildlife

    Take care

    The stream itself is their home.

    • Sewage lowers oxygen in the water, which fish and insect larvae need.
    • Algal growth can strip oxygen from the water at night.
    • Chemicals can harm fish, amphibians and the insects birds feed on.
    • Litter can entangle or be swallowed by birds and other animals.
How we work this out

Concern combines hazard — warning signs in residents' reports from the last 30 days, weighted by each observer's trust and each report's quality — with exposure: playgrounds, schools, parks, bathing and fishing spots and allotments from OpenStreetMap within 150 m. A sign is possible from 20% of reports and likely from 50% reported by at least 2 different people. All of these thresholds are uncalibrated priors.

This is an early prompt to take care, based on what people can see and smell. It is not a medical or public health assessment and not an official bathing-water classification — follow your local health and environment authorities.

How it has changed

no reportsno reportsno reportsno reportsMayJunJulAugSeptOct
Higher is healthier.Dot = what that month's reports suggest; grey bar = how sure we are.

What neighbours saw

  1. 16 days ago · Damselfly 8184 · demo data

    • Cloudy
    • Barely moving

    Sewage or rotten eggs, Foam on the surface, Green algae or scum, A lot of litter

  2. 26 days ago · Trout 7727 · demo data

    • Cloudy
    • Barely moving

    Sewage or rotten eggs, A lot of litter

  3. 26 days ago · Trout 7727 · demo data

    • Cloudy
    • Barely moving

    Sewage or rotten eggs, A lot of litter

  4. 29 days ago · Damselfly 9908 · demo data

    • Cloudy
    • Barely moving

    Sewage or rotten eggs, Foam on the surface, Green algae or scum, A lot of litter

  5. 17 Sept 2026 · Trout 7727 · demo data

    • Cloudy
    • Barely moving

    Sewage or rotten eggs, Dead fish, A lot of litter

Seen from space

Citizen and satellite

No usable satellite pass in the last 30 days — cloud cover or too few water pixels. This is shown as unavailable, never as agreement.

For scientists: the numbers behind this

Indicative status (WFD class names)

Bad96% likely

Posterior mean 0.065 (90% CrI 0.004–0.188)

Data confidence 62%

Citizen and satellite

No usable satellite pass in the last 30 days — cloud cover or too few water pixels. This is shown as unavailable, never as agreement.