• Sewer system

    The Massachusetts Water Resources Authority's sewage treatment system has undergone a nearly complete transformation under the federally mandated 11-year, $3.8 billion Boston Harbor Project. Learn how the sewer system works, explore Massachusetts sewer treatment facilities and sewer programs designed to reduce sludge and toxins, and get deals on nutrient-rich Bay State Fertilizer for use on lawns, shrubs, annuals, perennials, and vegetable gardens.
  • Waste prevention

    The Bureau of Waste Prevention (BWP) protects public health and the environment by ensuring that discharges and emissions, solid and hazardous wastes, toxic chemical use, and the health risks associated with them are reduced to the maximum extent possible and, when pollution or waste cannot be prevented, they are safely and effectively controlled or managed.
  • Wastewater and septic systems

    The Department of Environmental Protection's wastewater programs protect public health and the environment through regulation of discharges from treatment plants, industrial facilities, sewers, and other sources. This ensures the safety of septic systems and alternative septic treatment technologies and prevents pollution from stormwater runoff.
  • Wastewater and stormwater

    Septic systems, sewer systems, industrial wastewater, storm water, non-point source pollution, which comes from runoff from snow or rain, picking up pollutants as it travels on the ground -- all of these wastewater and storm water sources if left untreated can endanger drinking water supplies, wildlife habitat, and surface water bodies. Learn what Massachusetts is doing to protect your home and family from disease-causing pathogens.
  • Water, wastewater and wetlands

    MassDEP works to ensure that inland and coastal waters are monitored, protected, and safe for all to enjoy, and administers revolving loan programs that help the state's towns and cities improve their environmental infrastructure.
  • Cities & towns

    Access all sorts of data and information about cities and towns in Massachusetts.