Public Advocate Jumaane Williams says that NYCHA is the worst landlord in the city, with nearly 600,000 open Housing Preservation and Development (HPD) violations. He also talked about the top two worst landlords from the same company, A&E Real Estate, that have nearly 10,000 open violations. Williams says the annual worst landlords list is compiled using city data and HPD input, and serves as a powerful organizing tool for tenants.