The regencys environment office revealed that the three-day effort sought to restore Jambe by cleaning the tons of rubbish along the river.
Waste-contaminated water from nearby river flooded the farming area during rainy days.
The government is expected to study and investigate the cause of mangrove's death in Ambon Bay.
The environmentally damaging activities was first reported in 2021.
Information about the 13 hotspots were immediately communicated to all concerning agencies.
Baswedan also encouraged owners of motor vehicles in Jakarta to take part in emission test.
"It's in a form of incentive."
The main objective is to assist the locals in finding solutions to the frequent abrasion in their area.
A fine of Rp500,000 (US$35) will be imposed to those who are found burning trash.
Walhi also recommended the formulation of a climate change law to help authorities deal with current environmental challenges.
The retention ponds will temporarily retain water to prevent flood and to reserve the water to later be processed by water company, or PDAM.
Unauthorized activities that continue to take place in the forest area have been causing land degradation in the province.