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Welcome to the MiSWIM System

Surface Water Information Management System banner This page can be accessed as www.mi.gov/miswim.

Welcome to the Michigan Surface Water Information Management (MiSWIM) System. This application is an interactive map-based system that allows users to view information about Michigan's surface water. It was developed through a cooperative effort by the Michigan Department of Technology, Management, and Budget (DTMB), Michigan Department of Environmental Quality (DEQ), and Michigan Department of Natural Resources (DNR). Users are able to view and download data collected by the DEQ and DNR from surface water monitoring sites located throughout Michigan.

Enter the  MiSWIM  System

Enviro. Monitoring - This layer contains water/sediment chemistry, aquatic macroinvertebrate community and physical habitat data that have been collected by the MDEQ (or its contractors/grantees) for various Michigan surface waters.

Beach/River E.coli - This layer contains bacteriological data that have been collected by the MDEQ and local county health departments for various Michigan surface waters, including public bathing beaches. Information about beach closings and water quality standard exceedances is also provided.

Fish Contaminant - This layer contains fish contaminant data that have been collected by the MDEQ (or its contractors/grantees) for various Michigan surface waters. Fish contaminant data are used by the MDEQ to: determine whether fish from specific waterbodies are safe for human and wildlife consumption, assess spatial and temporal water quality trends, and as surrogate measures of bioaccumulative chemical concentrations in surface water.

USGS Gage Stations - This layer contains location information for the United State Geological Survey (USGS) flow gage stations in Michigan. Daily flow values summarized from time-series flow measurements taken each day for the period of record at the USGS gage stations are also provided.

High Flow - Data from the DEQ's High Flow Discharge Information database.

Low Flow - Data from the DEQ's Low Flow Discharge Information database.

Wastewater Discharges - This layer contains location and other information for all permitted discharges of wastewater to Michigan surface waters and groundwater. Anyone discharging, or proposing to discharge wastewater into Michigan surface water or groundwater is required by law to obtain a National Pollutant Discharge Elimination System (NPDES) or a State Groundwater permit.

Non-Point Source (NPS) Grants - This layer contains location and other information about nonpoint source water quality protection grants that have been awarded by the MDEQ to local units of government and nonprofit entities in Michigan.

Septage Haulers - This layer contains location and other information about the domestic septage land application sites in Michigan. The licensing and handling of domestic septage is regulated under 2004 Public Act 381, which amended Part 117, Septage Waste Services, of the Natural Resources and Environmental Protection Act, 1994 PA 451, as amended.
Lakes & Streams/Rivers - General information regarding lakes, streams, and rivers, collected and summarized by the DNR. Lake name, surface area, maximum depth, perimeter, fetch (longest unobstructed distance across the lake), type of waterbody, Town-Range-Section, and lake ID code.

Valley Segments - Michigan rivers and streams have been subdivided into ecologically similar units called Valley Segments. Within each Valley Segment, the river has a similar drainage area, discharge (flow, in cubic feet per second), nutrient concentration, summer water temperature, valley character, channel character, and key fish species. More information on Valley Segments is in the 1997 DNR report by Seelbach and colleagues (http://rivers.snre.umich.edu/mri/2036rr.pdf).

Coldwater Streams - Designated Trout Streams show those portions of rivers and streams officially designated as trout streams by a Fisheries Order of the Director of the MDNR as set forth in DNR-DFI 101 FO-210.01. The map layer was prepared using the list of streams in DNR-DFI 101 FO-210.01; that list (but not the map) has been subsequently modified. The current official list of Designated Trout Streams is set forth in DNR-DFI 101 FO-210.04, which can be found on-line at the following URL:

http://www.michigandnr.com/law/law_book/orders/Fisheries%20Orders.html#FO210 

Natural Rivers - Natural Rivers are officially designated portions of rivers protected under the DNR Natural Rivers Program, established by the Natural River Act (Part 305 of P.A. 451 of 1994). The purpose of Natural Rivers designation is to preserve and enhance a river's values for a variety of reasons, including aesthetics, free-flowing condition, recreation, boating, historic, water conservation, floodplain, and fisheries and wildlife habitat.

URL for MDNR Natural Rivers:
/dnr/0,1607,7-153-30301_31431_31442---,00.html 

Reports - DNR Fisheries Division reports about that waterbody.

Fish Stocking Information - The number of fish stocked in that waterbody by date and species.

Fish Species - List of game fish species found in that waterbody by Fisheries Division.


Please send comments or questions to Jason Smith at smithj18@michigan.gov or at 517-284-5556.

Hills Creek scenic