The Madison Health Department and Water Pollution Control Authority are involved in numerous activities to monitor and protect water quality.

• Water samples from streams and beaches are collected and tested on a regular basis and data going back over 20 years indicates good, and in some areas, improved water quality.
• Septic system plans are reviewed and all installations are inspected, septic failures are followed until corrected and septic tank pumping frequency is monitored.
• Several public water supply wells are located along the Hammonasset River and a sizable portion of town is considered an Aquifer Protection Zone. We work with the Connecticut Department of Environmental Protection to monitor commercial activities within this area to protect against potential chemical pollution.
• In cooperation with the Connecticut Department of Agriculture and the Madison Shellfish Commission we monitor commercial and recreational shell fishing in town waters. (See more detailed information about the Shellfish Program.)
• We participate in a hazardous waste program with the Regional Water Authority that allows residents to safely dispose of household hazardous waste.
• The town and schools follow Integrated Pest Management guidelines to minimize the use of chemicals on town owned property.