Our paper focused on the determination of heavy metals and nitrates in tomatoes (Lycopersicon esculentum). Four samples of tomatoes were analyzed by an accredited testing laboratory. The concentrations of heavy metals and nitrates in tomatoes spontaneously occurring on the landfill body meet the limits provided by law. Tomatoes from a chain store and private grower were used as standards. The conducted research complemented classic landfill monitoring (17 years) and long-term biomonitoring (6 years) of the landfill body and the nearest surroundings. Neither the concentrations of heavy metals in the tomatoes nor the concentrations of heavy metals in surface water, ground water, and leachate exceeded the limits stipulated by law. During the period of monitoring, no significant impact of the landfill on the environment was detected