Last Updated 08/24/2026
Annual BMP Maintenance Report
“To ensure that the maintenance of privately owned stormwater management facilities is conducted per the BMP Maintenance Agreement and the Stormwater Management Facilities Report (SWMFR), MSD requires that an Annual BMP Maintenance Report is submitted to the District for all commercial and residential homeowner association maintained facilities. The Annual Report should provide documentation that maintenance was performed in accordance with the Stormwater Management Facilities Report submitted to and approved by MSD for the development project. An MSD inspector will also periodically inspect the BMP.
The Annual Report should consist of a completed inspection checklist and/or maintenance log, narrative description of corrective action measures taken, photographs, and any other documentation appropriate for demonstrating compliance with the BMP Maintenance Agreement and your SWMFR. In the Annual Report, also provide the current property owner’s name, address, phone, and other relevant contact information.
For consistency and for your convenience, MSD has developed an Annual BMP Maintenance Report Form and BMP Inspection Checklists. The report form and the inspection checklists are not mandatory for use by BMP owners, and are being provided as templates to ensure compliance with minimal maintenance requirements. Links to both can be found be on this page. Use of the inspection checklists provided here, will not exempt BMP owners from design and maintenance requirements specified in the SWMFR. If the system in place is a proprietary system, please contact the manufacturer for the inspection checklist for the specific system. MSD does not have a preferred BMP vendor list for BMP inspections, maintenance and/or annual reporting.
To avoid compliance enforcement actions, the Annual BMP Maintenance Report should be submitted no later than March 31st of the year following the reporting year.
The Annual Report should be submitted to:
Metropolitan St. Louis Sewer District
Division of Environmental Compliance
c/o Phase II Stormwater Management Program
10 E. Grand Avenue
St. Louis, MO 63147
View State Page
Frequently Asked Questions
Who requires stormwater BMP maintenance reporting in St. Louis?
The Metropolitan St. Louis Sewer District (MSD) oversees this requirement, not the city directly. MSD requires an Annual BMP Maintenance Report for all commercial and residential homeowner association-maintained stormwater facilities, to confirm that maintenance is happening in line with each property’s BMP Maintenance Agreement and its previously approved Stormwater Management Facilities Report (SWMFR).
What has to be included in the Annual BMP Maintenance Report?
The report needs a completed inspection checklist or maintenance log, a narrative description of any corrective action taken, and photographs or other documentation showing the property is meeting its BMP Maintenance Agreement and SWMFR obligations. Property owners also need to include current contact information, including the owner’s name, address and phone number, so MSD can reach the responsible party directly if questions come up.
When is the Annual BMP Maintenance Report due?
The report is due no later than March 31 of the year following the reporting year. Missing this deadline can trigger compliance enforcement action, so it’s worth building this date into a property’s standing calendar well ahead of time rather than treating it as a once-a-year scramble.
Does MSD inspect stormwater facilities beyond the annual report?
Yes. An MSD inspector periodically inspects BMPs directly, independent of the reports property owners submit. This means the annual report isn’t the only checkpoint. It’s paired with the district’s own on-site verification, so documentation and actual field conditions need to match.
Is there a required format for the Annual BMP Maintenance Report?
MSD provides an Annual BMP Maintenance Report Form and BMP Inspection Checklists as templates, but their use isn’t mandatory. Property owners can use their own documentation format as long as it satisfies the underlying SWMFR and maintenance agreement requirements. If a property’s BMP is a proprietary system, the manufacturer’s own inspection checklist should be used instead, since MSD doesn’t maintain a preferred vendor list for BMP inspections or maintenance.
Where do I submit the Annual BMP Maintenance Report?
Reports go to the Metropolitan St. Louis Sewer District, Division of Environmental Compliance, c/o Phase II Stormwater Management Program, 10 E. Grand Avenue, St. Louis, MO 63147.
Where can I find MSD's maintenance guides and reporting templates?
MSD publishes maintenance guides by BMP type, along with the Annual BMP Maintenance Report Form and inspection checklists. General stormwater program information is available on MSD’s Stormwater Management page, and countywide resources are available through St. Louis County’s Stormwater Resources page.
The information on this page is provided for general informational purposes only and is not legal advice. Regulations change frequently — AQUALIS makes no warranty as to the accuracy or completeness of this content, and any reliance on it is at your own risk. Consult a qualified professional or your local regulatory authority to confirm requirements applicable to your specific property.
