Coimbra
Rio Ceira
Very unhealthy
This water is badly degraded. Based on what neighbours noticed — we are fairly sure.
10 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 (94% of 6 reports, 4 people), chemical smell or foam (35% of 6 reports, 2 people), heavy litter (94% of 6 reports, 4 people).
People and children
Avoid contact with the water
Nearby: School (Escola Básica do 2º e 3º Ciclo de Ceira) 121 m
- Avoid touching the water and wash hands after being near it, especially children.
- 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 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.
- 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 · Trout 7727 · demo data
- Cloudy
- Barely moving
Sewage or rotten eggs, A lot of litter
22 days ago · Otter 6071 · demo data
- Cloudy
- Barely moving
Sewage or rotten eggs, A lot of litter
23 days ago · Water Vole 6453 · demo data
- Cloudy
- Barely moving
Sewage or rotten eggs, Foam on the surface, A lot of litter
24 days ago · Beaver 7951 · demo data
- Cloudy
- Barely moving
Sewage or rotten eggs, Green algae or scum, A lot of litter
25 days ago · Moorhen 4882 · demo data
- Clear, I can see the bottom
- Flowing
- No smell
No warning signs
29 days ago · Trout 7727 · demo data
- Cloudy
- Barely moving
Sewage or rotten eggs, Foam on the surface, A lot of litter
1 Sept 2026 · Moorhen 4882 · demo data
- Clear, I can see the bottom
- Flowing
- No smell
No warning signs
31 Aug 2026 · Trout 7727 · demo data
- Cloudy
- Barely moving
Sewage or rotten eggs, 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)
Bad91% likely
Posterior mean 0.103 (90% CrI 0.021–0.230)
Data confidence 72%
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.