The Federal Government has issued a warning over rising groundwater contamination in Kogi, Lagos and Kebbi states after recent assessments revealed dangerous chemical and microbial pollutants in several communities.
The Nigeria Hydrological Services Agency (NiHSA) announced the findings at a press briefing in Abuja. Director-General Umar Mohammed said tests conducted on wells and boreholes showed alarming concentrations of lead, cadmium, nitrite, fluoride and harmful microorganisms.
He explained that the contamination—linked to sewage infiltration, waste leaching and corroded pipelines—poses serious health risks such as neurological disorders, kidney damage, blue-baby syndrome and bone deformities.
In Lokoja, Kogi State, lead levels were found to range between 0.56 and 12.0 mg/L, far exceeding safety standards. E. coli, Streptococcus and Salmonella were also detected, pointing to faecal pollution and increased risk of waterborne diseases.
NiHSA attributed part of the problem to damaged drainage systems and floodwater intrusion in riverine communities.
In Lagos, areas including Ikeja and Ikoyi recorded both chemical and microbial contamination.
In Kebbi State, groundwater samples from Argungu Local Government Area showed arsenic concentrations between 0.75 and 4 mg/L—levels that could cause arsenicosis, liver damage and severe intestinal illness with prolonged exposure.
Water engineer Mathew Ajisafe advised residents in the affected areas to stop using water from wells and boreholes until declared safe, urging state governments to supply treated water through their water boards.
Acting Director of Hydrogeophysics at NiHSA, Sunday Husseini, said the agency has briefed the state governments involved.
Kebbi has agreed to conduct a full investigation to identify pollution hotspots and integrate treatment facilities into its water supply network, while discussions with Lagos and Kogi are ongoing.
Husseini added that NiHSA is working on new hydrological regulations to improve water quality management, reduce disaster risks and link monitoring systems with flood forecasts.
He urged Nigerians to comply with official advisories and adopt safe water practices to protect public health.
