Check formalin in fishes

Dear Editor,
I would like to request the Capital District administration to examine the purity of fishes being supplied from outside the state to determine presence of formalin.
I have an apprehension that there might be presence of chemicals to preserve the fishes, brought from outside the state that’s being sold in the markets of Itanagar which is a matter of grave concern.
Yours,
Nabam Khoda,
Nirjuli