The city has dismissed two of the three ethics complaints filed by Environmental Commission member John Hertko.
Hertko filed the complaints against two city administrators and outside consultants over cost estimates included in the 620-page report completed in November for the city's search for an alternate water source.
The DuPage Water Commission objected to cost estimates applied to its agency, and the city last week removed those numbers for the report.
But city lawyers recommended no action against Public Utilities Director Allison Swisher, one of the targets of Hertko's complaints along with interim City Manager Steve Jones.
Jones, who has authority over ethics complaints against staff, said he agreed with city lawyers and has dismissed the complaints against Swisher and consulting engineers who reviewed the cost estimate.
Outside contractors are not subject to the city ethics code, city lawyers said in a memo on the complaints.
Swisher and the city's consulting engineers have defended the accuracy of the cost estimates.
The complaint against Jones is pending.
"Since the City Council is my supervisor, any disposition of the complaints against me will be handled at the City Council level," Jones said in an email. "I cannot tell you when that will be done."