Police in Cardiff Bay tackling drug crime say more than 60 people have been arrested in recent months.
Neighbourhood officers in the Butetown and Grangetown areas claim there has been a "noticeable increase" in information coming forward from concerned residents both in person and online.
According to South Wales Police, the number of arrests is the result of partnership work with local communities in both districts.
A spokesperson said: "We know drug dealing continues to be a concern in these areas."
"Please be reassured South Wales Police has a zero-tolerance approach to drug dealing this is just one example of the work we are doing."
"We can, and regularly do, act upon the information provided to us by the public, so please keep it coming."
Anyone with information about illegal drug supply should contact South Wales Police on 101 or use the live web chat.

Post Office Seeks New Operator in Dinas Powys as Village Faces Loss of Its Last Branch
Gardening team praised after helping police clear fallen tree near St Brides Major
Specsavers calls on children in Barry to design Wales Deaf Rugby World Cup shirts
Whitmore High Named One of UK’s Best Workplaces for Development
Steel Signing Marks Major Milestone in St Richard Gwyn School Redevelopment
Two Rescues in Record Heat as Volunteer Teams Respond to Afternoon Emergencies
Police find evidence of a large-scale cannabis cultivation at Riverside Place property fire
Network Rail confirm closure of Brookside level crossing in Dinas Powys
Police given powers to ask people to leave Comeston Lakes Country Park
Planned children’s role play centre could be given the go-ahead by Vale Council
Marie Curie Garden Fayre deemed huge success
Council seeks views on Future of Colcot Sports Centre and Buttrills Playing Fields
First Minister quizzed on further devolution, budget decisions, and misinformation in FMQs
Extreme heat leads to changes to services and closures
Severe Heat Warning Set to Disrupt Rail Travel Across South Wales This Week
Communities asked to support older people across Wales during severe heat warning
Caribbean Community Wales Brings Wales‑Wide Launch to Barry This Weekend
Community Award winner calls for sanitary bins in men’s toilets after living with prostate‑cancer‑related incontinence
Cardiff Airport Backs Holiday Safety Campaign Honouring Rhoose Teenager Tom Channon