Sewer District #1 is located in North White Plains. The department maintains the manholes and trunk lines, all wastewater is conveyed into Westchester County Treatment Plants.
Sewer District #1B is located in the Quarry Heights section of North White Plains. Sewage is conveyed through the Town of Harrison to a Westchester County treatment plant.
Sewer District #2 is located in the downtown Armonk area. The district includes five sewer pump stations along with collection lines and manholes. All flow ends up at the wastewater plant which has recently been upgraded to treat 500,000 gallons per day.
Sewer District #3 is located in the vicinity of Route 120 & New King Street. The district consists of three sewer pump stations where sewage is collected and pumped to a Westchester County system.
Sewer District #4 is located at Old Orchard Street in Quarry Heights. It is a small collection system and pump station which conveys sewage through the Town of Harrison to a Westchester County treatment plant.