Suspected agrochemical pollution, coupled with illegal mining activities, has led to the death of fish in the Sissili River in the Builsa South District in the Upper East Region.
A disturbing sight of dead fish floating on the surface of the river in March this year triggered concern among the residents living along the bank of the river, who subsequently reported the situation to the appropriate authorities.
Responding to the concern, a research team, including experts from the Fish Health Unit of the Northern Sector directorate of the Veterinary Services, Water Resources Commission and the Fisheries Commission, were dispatched to the scene to conduct field and laboratory examinations.
Disclosing the findings of the investigation last Monday to the Regional Minister, Donatus Akamugri Atanga, the leader of the team, Dr Stanley Hughes-Obresi said empty agrochemical containers were found along the bank of the river, raising suspicions of contamination.
Also, he said that evidence of illegal mining activities upstream was observed and stressed that almost all the fish had liver lesions, including abnormal frothy material in the intestines and haemorrhaging in the testes.
He explained that such symptoms strongly suggested exposure to harmful substances, particularly agrochemicals or heavy metals such as mercury, adding: “Preliminary laboratory tests by the Ghana Standards Authority confirmed traces of mercury in water samples taken from the river.”
Dr Hughes-Obresi said further tests on tissue samples were ongoing to confirm the presence of additional toxins, and mentioned that “while the source of the contamination remains under investigation, the possibilities range from the indiscriminate use of agrochemicals near the river and illegal mining that introduce heavy metals into the ecosystem.”
He warned that if, indeed, the incident was from illegal mining activities, then the danger is long-term, as continuous exposure to mercury could lead to cancers and even congenital malformations.
He called for strict regulation of agrochemical usage near waterbodies and sustainable mining practices to mitigate environmental degradation.
Swift response
Mr Atanga lauded the technical team for their swift response to the life-threatening situation and urged immediate community sensitisation to forestall further harm among the people.
Some of the dead fishes discovered during the investigation
“We must educate the residents on the risks associated with the consumption of fish under such circumstances,” he said, adding, “I entreat you to make the final report available to guide broader preventive measures.”
Further, he emphasised the need to share the findings with the North East Region, since the river flows through the area.
Writer’s email: gilbert.agbey@graphic.com.gh
