Annual Sewer Act Enforcement Summary
September 3, 2025 to June 25, 2026
The Department of Environmental Facilities (“DEF”) provides the following report summarizing actions and measures taken to enforce compliance with the Laws of Westchester County (“LWC”) Chapter 824 (the “Sewer Act”) during the period identified above, for the Blind Brook, Port Chester, Mamaroneck, and New Rochelle Sewer Districts.
DEF sent a reminder to all noncompliant municipalities on October 20, 2025 noting that annual municipal sewer maintenance and repair reports had been due on September 1 in accordance with LWC § 824.72(7). DEF also sent a reminder to all municipalities on January 9, 2026 stating that annual map filings were due January 15 in accordance with LWC § 824.73(2).
Town/Village of Harrison:
DEF received neither a map nor a report from the Town/Village of Harrison. A notice of noncompliance was sent on June 12, 2026 and a hearing scheduled for July 8, 2026. Harrison sent the annual report on June 23, 2026 and advised the map will be sent shortly.
Village of Larchmont:
DEF received an annual report on August 29, 2025 and a map filing from the Village of Larchmont on January 27, 2026. As to the Village’s flows, DEF corresponded with the Village, indicating that the flow monitoring report it provided under its Inter-Municipal Agreement (“IMA”) with the County was insufficient and did not demonstrate compliance with the Sewer Act. At the Village’s request (joint with the other NRSD municipalities as part of a Consortium), DEF has met and discussed the flow monitoring report, including the deficiencies therein. The Consortium has agreed to do a new round of flow monitoring, to address DEF’s concerns, so as compliance with the Sewer Act can be better ascertained. DEF has provided specific guidance to the Consortium as to what needs to be included in a flow study, and has continued to correspond with the Consortium regarding status and next steps.
Town of Mamaroneck:
DEF received an annual report on October 15, 2025 and a map filing on January 12, 2026 from the Town of Mamaroneck. As to the Town’s flows, DEF corresponded with the Town, indicating that the flow monitoring report it provided under its IMA with the County was insufficient and did not demonstrate compliance with the Sewer Act. At the Town’s request (joint with the other NRSD municipalities as part of a Consortium), DEF has met and discussed the flow monitoring report, including the deficiencies therein. The Consortium has agreed to do a new round of flow monitoring, to address DEF’s concerns, so as compliance with the Sewer Act can be better ascertained. DEF has provided specific guidance to the Consortium as to what needs to be included in a flow study, and has continued to correspond with the Consortium regarding status and next steps.
Village of Mamaroneck:
DEF sent a notice of noncompliance to the Village of Mamaroneck regarding the Village’s failure to submit a sewer map and annual report, as well as flow in excess of the allowable amount. A videoconference to address the Village’s non-compliance has been scheduled for July 27, 2026
City of New Rochelle:
DEF has taken several actions with respect to the City of New Rochelle. With respect to the City’s failure to timely submit its annual report, DEF corresponded with the City, which led to the City filing the annual report. As to the City’s flows, DEF corresponded with the City, indicating that the flow monitoring report it provided under its IMA with the County was insufficient and did not demonstrate compliance with the Sewer Act. At the City’s request (joint with the other NRSD municipalities as part of a Consortium), DEF has met and discussed the flow monitoring report, including the deficiencies therein. The Consortium has agreed to do a new round of flow monitoring, to address DEF’s concerns, so as compliance with the Sewer Act can be better ascertained. DEF has provided specific guidance to the Consortium as to what needs to be included in a flow study, and has continued to correspond with the Consortium regarding status and next steps.
In addition, on June 12, 2026 DEF sent a notice of noncompliance to the City of New Rochelle regarding its failure to submit a map. A hearing to address the noncompliance has been scheduled for July 9, 2026. New Rochelle responded to DEF on June 22, 2026 and advised it will send the documents imminently.
Village of Pelham Manor:
DEF received an annual report from the Village of Pelham Manor on August 20, 2025 and a map filing on January 13, 2026. As to the Village’s flows, DEF corresponded with the Village, indicating that the flow monitoring report it provided under its IMA with the County was insufficient and did not demonstrate compliance with the Sewer Act. At the Village’s request (joint with the other NRSD municipalities as part of a Consortium), DEF has met and discussed the flow monitoring report, including the deficiencies therein. The Consortium has agreed to do a new round of flow monitoring, to address DEF’s concerns, so as compliance with the Sewer Act can be better ascertained. DEF has provided specific guidance to the Consortium as to what needs to be included in a flow study, and has continued to correspond with the Consortium regarding status and next steps.
Village of Port Chester:
DEF received neither a map nor a report from the Village of Port Chester. A notice of noncompliance was sent on June 12, 2026 and a hearing scheduled for July 9, 2026. Port Chester responded on June 23, 2026, transmitted the maps and advised the report will be sent imminently.
City of Rye:
DEF received an annual report from the City of Rye on January 21, 2026 and a map filing on January 15, 2026. DEF is in receipt of the City’s flow monitoring data and is finalizing an analysis to assess compliance with flow limits.
Village of Rye Brook:
DEF received neither a map nor a report from the Village of Rye Brook. A notice of noncompliance was sent on June 12, 2026 and a hearing scheduled for July 9, 2026. Rye Brook contacted the County on June 22, 2026 and agreed to provide the required documents.
Village of Scarsdale:
DEF received an annual report from the Village of Scarsdale on September 4, 2025 but did not timely receive a map filing. A notice of noncompliance was sent on June 12, 2026. Scarsdale contacted DEF on June 17, 2026 and provided the maps.
City of White Plains:
DEF received an annual report from the City of White Plains on September 6, 2025 but has not received a map filing. A notice of noncompliance was sent on June 12, 2026 and a hearing scheduled for July 9, 2026. White Plains responded on June 17, 2026 and advised the documents will be sent imminently.