Detroit has the highest number of combined known and potential lead service lines in Michigan

This table presents data provided to the Michigan Department of Environment, Great Lakes and Energy by public drinking water system providers detailing inventories of the lead service lines within their systems. Note:  "Potential" lead service lines include those with unknown material.  
  

Note: This data is the most recent published by EGLE, but it is outdated. Some communities may have replaced known lead service lines since this data was published. Check with your water system for the most up-to-date information. You can search this table for the most recently available data published for your water system. Because this data may be out of date, it's best to check with your community water system:
Note: This data is the most recent published by EGLE, but it is outdated. Some communities may have replaced known lead service lines since this data was published. Check with your water system for the most up-to-date information. ***/ Definitions of column headers: Known or Potential Lead Service Lines is the sum of the following categories: Known Lead, Known Galvanized Previously Connected to Lead, Unknown-Likely Lead, and Unknown - No information. Known Lead: Any portion of the service line contains lead. Known Galvanized Previously Connected to Lead: A galvanized service line that WAS previously connected to lead. Unknown - Likely Contains Lead: While not known for certain, service lines the water supply believes are likely to contain lead. Unknown – Material(s) Unknown: Service line materials are fully unknown. Supply has no information regarding the likelihood of lead being present in the service line. Unknown - Likely Does NOT Contain Lead: While not known for certain, service lines the water supply believes are NOT likely to contain lead. Contains neither Lead nor Galvanized Previously Connected to Lead: Service lines that are known to contain NO lead in any portion. These typically include copper, plastic, cast iron, or galvanized that was NEVER connected to lead. Total Service Lines - the sum of all the above
Source: Michigan Department. of Environment, Great Lakes and EnergyGet the dataCreated with Datawrapper