AP news guide: The Flint water crisis emails
The disclosure Tuesday was the 10th and final mass-release of such records, which total nearly a half-million pages and revealed his administration's inner dialogue over the crisis.
The disaster began when the poverty-stricken city of nearly 100,000 residents left Detroit's water system and started using improperly treated Flint River water in April 2014 while under state management.
Snyder says they were made public to increase transparency and in response to public records requests, lawsuits and criminal investigations.
Michigan was forced to help Flint return to Detroit water eight months later, after elevated lead levels were confirmed in children.
In March 2015, Flint's then-emergency manager, Jerry Ambrose, sent to a deputy state treasurer a news story that said the county where Flint is located could see water bills rise as much as 16 percent after the Detroit system approved rate increases.
Snyder spokesman Ari Adler said other emails — even those responding to Flint-related emails — are not related to the crisis and were redacted since the governor's office is exempt from the Michigan Freedom of Information of Act.
The latest emails include about 270 pages of a form letter just over one page long sent by Snyder's constituent relations division from Dec. 21 to Dec. 28 to recipients whose names are redacted for privacy reasons.
Criminal charges have been filed against two state environmental regulators, but will the probe ensnare the governor's office?
State agencies have spent an unspecified amount on software or other services to help process FOIA and legal discovery requests.