The question

It was never disclosed to me when I purchased this home 4 years. All vegetation in yards has died 2 and through trying to replant found out about contamination. I notified mortgage lender suggesting another reason to modify loan and let me stay. What are my rights for non-disclosure. I would never have bought a home sitting on arsenic. City never recorded the epa reports. They said an oversight on their part that is why my realtor did not know.