Please click on the "Supplier Registration" link above to register to bid on opportunities with Nassau County. To access a bid please go to Vendor Portal and click the "Nassau County Procurement".Enter the name, title, phone number and email address for the person completing the form. Sign and date the form in the designated boxes. Welcome to the Online Vendor Bid Site for suppliers and bidders interested in bidding opportunities for the commodities services and technology contracts. Before you start to fill out the bid form, read the bid carefully. Sign up to receive a text message or email when new bids are added! Water Authority of Western Nassau County - A water utility serving a population of approximately 120000 on Long Island in New York. D) Understanding of required design plan elements as outlined in the request (5 points).