Abstract: A well chemical treatment system includes a chemical dispenser having a control signal input and a chemical outlet in fluid communication with a well. A chemical dispenser controller operates the dispenser and detects a well fluid lift pump controller signal. The chemical dispenser controller transmits a control signal to the chemical dispenser at selected times and is configured to increment the counter and inhibit transmission of the control signal when a selected time occurs and a pump in operation signal is not detected. When the chemical dispenser controller detects a pump in operation signal at one of the selected times, the chemical dispenser controller sends a control signal to the chemical dispenser to dispense an amount of chemical into the well equal to a product of a number in the counter plus one and an amount of chemical to be dispensed into the well at each selected time.