They will only trickle out info as it's discovered by the press or leaked
We are such a surveiled society, they definitely know more people are hurt, they know the impact of the spill, they know how many are impacted by the chemical spill and they likely fear it will come out how they probably worked to get regulation out of the way which allows a failure like this to spill into the river.
Does anyone know what I'm referencing when I say, "and then you just add a squirt of lattice, a squirt of napkins..." Or, "quit fake pressing buttons on the microwave!!"