Dubliners are being invited to find out exactly how dirty their city's rivers, lakes and canals really are.
A new project by Dublin City University's Water Institute, in partnership with Earthwatch Europe, sees the first ever Dublin WaterBlitz take place later this month.
From September 20-23, the project is encouraging Dubliners to test the water in waterways around the capital to help gain an insight into its quality.
Those who register to be part of the WaterBlitz on the Earthwatch site will receive a free testing kit in the post.
Over the four days, they can test the water as many times as they like and input their results on the Freshwater Watch app.
Earthwatch will then compile a report from the data collected that will give a picture of our local waterways. This report will then be sent to all volunteers.
The project comes at a time when our waterways are facing increasing threats from development, as well as from human waste pollution, industrial pollution and fertilisers.
The Dublin WaterBlitz was launched yesterday at DCU's Water Institute by two of Met Eireann's top scientists - head of forecasting Evelyn Cusack and head of climatology and observations Seamus Walsh.
Speaking at the launch, Ms Cusack said: "We're fortunate here in Ireland that we have an abundance of rainfall and clean fresh water, and we want to keep it that way.
"Everyone has a responsibility to ensure our water remains clean and healthy."
Mr Walsh added: "People need to take ownership of the scientific aspect of water, because... it's a fundamental aspect of our daily lives."
The deadline for registration is September 15.