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Investigation ·

Cochadas, Tocha, Cantanhede, Coimbra, Portugal

40.37310, -8.73191Insufficient data

Guided assessment

No photograph — observations come from the guided checklist, attributed to the reporter.

Observation

What is visible

  • ColourConfirmed

    90%

    the water appears blue with a slight greenish tint

  • ClarityConfirmed

    80%

    the water is relatively clear, with gentle ripples and the riverbed not clearly visible

  • SurfaceConfirmed

    90%

    the surface shows calm movement with small ripples and reflects the sky, with no visible foam or scum

  • DebrisConfirmed

    90%

    no floating debris or litter is visible on the water surface

Evidence

What sources state

No sourced claims were extracted for this investigation.

Assessment

Insufficient data

INSUFFICIENT DATA

confidence 30%

30%

The available evidence does not support a risk conclusion either way.

Inference

The photograph shows clear, blue‑green water with no visible foam, debris, or discoloration, and the nearby wastewater treatment plant is downstream of the site. No authoritative water‑quality data or incident reports for this specific point were found in the available sources. Because there is no reliable, location‑specific evidence of contamination, a risk level cannot be determined.

Risk factors considered

  • absence of water‑quality measurements for this location
  • proximity of a wastewater treatment plant (downstream) but no evidence of impact
  • no visible signs of pollution in the image

What to do next

Treat this water as untested. Avoid drinking or domestic use until a laboratory test can be carried out, and ask your local environmental authority whether recent sampling exists for this location.

What this cannot tell you

  • cannot assess chemical, bacterial, or heavy‑metal contamination
  • cannot verify the user‑reported smell or dead fish
  • no government or agency water‑quality reports for this exact site
  • limited source authority and coverage

Interoperability

Context

Nearby mapped features

  • Estação de Tratamento de Águas Residuais de CantanhedeWastewaterDownstream442 m

Proximity is context only. Nothing here indicates that a listed feature affects this water.

Sources

Where the information came from

(A): Location of Fervença River, Bragança city, sampling ...researchgate.netScientificdate unknownUrban rivers are vulnerable to contamination from wastewater discharges and diffuse urban inputs. This study investigates the spatial-temporal distribution of ...Fervença river water quality evaluationbibliotecadigital.ipb.ptUnverifieddate unknownThe water quality of the Fervença River in Bragança, Portugal, was assessed to use the WQI by monthly collections between January 2022 and June 2022. Samples ...Tracking Urban Impact on the Fervença River via Water ...bibliotekanauki.plUnverifieddate unknownFervença River flows through the city of Bragança, the water quality indices decrease in most campaigns, particularly after Point 5.Tracking Urban Impact on the Fervença River via Water ...inz-min.onlineUnverifieddate unknownThis study utilized The WQI was used to evaluate the water quality of the Fervença River in Bragança, Portugal, from January to June 2022. Water ...Olhos Da Fervença – Water Qualitywildopenwater.comUnverifieddate unknownOfficial bathing water quality data and pollution warnings for Olhos Da Fervença. It can incapacitate even strong swimmers within seconds and ...PR12 – SEI/ROTA DA FERVENÇAvisitseia.ptUnverifieddate unknownPróximo do cabeço da Carnazeda, as águas da ribeira da Fervença precipitam-se numa cascata, proporcionando neste local uma ampla vista sobre o vale e a aldeia.Município de Cantanhede tem nova estação de tratamento ...aguasdocentrolitoral.ptUnverifieddate unknownA empreitada, de mais de 9 milhões de euros, vai permitir tratar efluentes domésticos e industriais de Cantanhede, complementando outra obra ...Águas Residuais |inova-em.ptUnverifieddate unknownPresentemente, o Concelho de Cantanhede possui em funcionamento, nove sistemas autónomos de drenagem e tratamento de águas residuais e uma parte do ...Município de Mira saúda entrada em funcionamento da ...cm-mira.ptUnverifieddate unknownEstação de Tratamento de Águas Residuais (ETAR) de Cantanhede, inaugurada esta segunda-feira, uma infraestrutura de 12,8 milhões de eurosEmissário e Estação de Tratamento de Água Residuais do ...participa.ptUnverifieddate unknownAlguns objetivos do Projeto : Aumentar a capacidade de drenagem e tratamento de águas residuais; Resolver as debilidades atuais do sistema de saneamento; ...Central de captação e reservatórios de água da Fervença ...cm-cantanhede.ptUnverifieddate unknownO executivo municipal aprovou o projeto de remodelação da central de captação e reservatórios de água da Fervença, que a INOVA-EM irá ...ETAR de Cantanhede vai custar quase dez milhõesindustriaeambiente.ptUnverifieddate unknownA futura ETAR irá tratar todo o efluente proveniente do município de Cantanhede, enquanto que as águas residuais afluentes do município de Mira ...

Exports

Cochadas, Tocha, Cantanhede, Coimbra, Portugal · Hydros