Stop flushing anything else into the toilet.
Tell your friends and family to do the same.
Document contamination episodes - take photos and videos.
If you are the responsible authority, acknowledge that the city has a problem and work to tackle it.
Share information about the problem - online (facebook, twitter, instagram, your own page, etc) and offline.
Use #BadalonaMar hashtag.
Politely challenge misinformation by the media and the responsible authorities, pointing out that rain doesn't contaminate waters, sewage overflow does.
If you are the responsible authority, encourage the use of accurate simple language.
Contact your councillor or local authority and raise the problem with them. Write them an email, letter or see them face-to-face.
Demand protocols of the EU bathing water directive to be followed and timely information about the cause, approximate duration and plans to prevent future contamination to be stated during short-term contamination episodes.
Connect with others: waste management experts, communities affected by water contamination and people passionate about water quality and environment.