Strategic Plan & Performance
GIS Maps and Data
Rain Gauge Data
Blue Notes Newsletter
Blue Notes Newsletter Sign-up
What We Do
Education and Outreach
Milwaukee Estuary AOC Projects
What You Can Do
Become a Fresh Coast Guardian
Home HazMat Collection
Water Drop Alert
What Not to Flush
Construction and CAD Standard Documents and Special Bid Attachments
Events & Outreach
Contract Compliance Login
Government & Business
Rules & Regulations
Private Property I & I
Pipe Check Contractor Resources
Industrial Waste & Pretreatment
Industrial Honor Roll
Total Maximum Daily Loads (TMDL)
2050 Facilities Plan
2020 Water Quality Initiative
The Milwaukee Metropolitan Sewerage District GIS group provides geospatial leadership, expertise, communication, and coordination to support the core business processes of the District. The GIS group administers the distribution of current, accurate, high-quality geospatial data and a platform of integrated GIS maps and tools to support the District’s Strategic Mission to protect public health and environment through world-class, cost-effective water resource management, leadership, and partnerships.
MMSD is a participating member of Wisconsin’s One-Call Center, Diggers Hotline, and operates as a receiving station for tickets responding to planned as well as unanticipated excavation activities. The District is responsible for assessing the information in the tickets and taking action to protect District facilities, human life and the environment.
View MMSD Facilities Map Legend for Diggers Hotline.
How to interpret a MMSD Planning Print
MMSD Open Data Portal
The purpose of the MMSD Open Data Portal is to provide the public with access to the geographic data available through the Milwaukee Metropolitan Sewerage District. Users may use this site to access and/or download geographic data and the associated metadata. Users who wish to access or download data agree to understand and abide by the terms and conditions of the MMSD data disclaimer.
If you are looking for municipal sewer data, please contact the municipality directly. Learn the differences between MMSD Metropolitan Interceptor Sewers and municipal sewers on our sewer page.
For all other requests, please refer to Records Request.