Biosolids Land Application Information
In Michigan, wastewater treatment plant sludge can be landfilled or incinerated or can be treated and land applied as biosolids. The graph below shows the tonnage in dry tons (dt) of each reported in Michigan.
Land Application of Biosolids is monitored by EGLE staff. The graph below shows the tonnage land applied as reported on the biosolids annual report.
Biosolids Metal Information
Biosolids undergo stringent monitoring for a variety of pollutants. Below is a table containing the Table 1 - Ceiling Concentration Limits for biosolids. The Ceiling Concentration is the maximum concentration level of heavy metals that may be land applied. If biosolids contain metal concentration greater than these limits, alternative disposal methods such as land filling or incineration must be used.
The graph below shows statewide average concentration rounded to the nearest whole number for each of the analytes. This information is reported annually on the discharge monitoring reports (DMR) as part of the Annual Report.