Coimbra
Ribeira dos Covões
Very unhealthy
This water is badly degraded. Based on what neighbours noticed — we are somewhat sure.
9 reports from 5 people
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 (81% of 5 reports, 3 people), algae or scum (81% of 5 reports, 3 people), chemical smell or foam (25% of 5 reports, 1 person), heavy litter (81% of 5 reports, 3 people).
People and children
Avoid contact with the water
Nearby: Park (Mata Nacional do Choupal) 121 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
Avoid contact with the water
Nearby: Park (Mata Nacional do Choupal) 121 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
What neighbours saw
21 days ago · Moorhen 4882 · demo data
- Clear, I can see the bottom
- Flowing
- No smell
No warning signs
22 days ago · Otter 7933 · demo data
- Cloudy
- Barely moving
Sewage or rotten eggs, Green algae or scum, A lot of litter
26 days ago · Moorhen 4882 · demo data
- Clear, I can see the bottom
- Flowing
- No smell
No warning signs
26 days ago · Water Vole 5706 · demo data
- Cloudy
- Barely moving
Sewage or rotten eggs, Green algae or scum, A lot of litter
29 days ago · Dragonfly 3181 · demo data
- Cloudy
- Barely moving
Sewage or rotten eggs, Foam on the surface, Green algae or scum, A lot of litter
11 Sept 2026 · Trout 7727 · demo data
- Cloudy
- Barely moving
Sewage or rotten eggs, Foam on the surface, Dead fish, A lot of litter
10 Sept 2026 · Moorhen 4882 · demo data
- Clear, I can see the bottom
- Flowing
- No smell
No warning signs
8 Sept 2026 · Otter 7933 · demo data
- Cloudy
- Barely moving
Sewage or rotten eggs, Foam on the surface, Green algae or scum, 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)
Bad62% likely
Posterior mean 0.184 (90% CrI 0.060–0.348)
Data confidence 68%
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.