- Board Considers Proposed Amendments to General Use Water Quality Standards for
Dissolved Oxygen
The Illinois Pollution Control Board is considering a proposal to amend the Board’s rule
establishing general use water quality standards for dissolved oxygen (35 Ill.
- Adm.
- Code 302.206, which the Board has docketed as R04-25.
- IAWA asserts that these standards are too restrictive.
- IAWA proposes amending
the rule so that during the months of July through February, dissolved oxygen must not be less
than a one-day minimum concentration of 3.5 mg/L, and a seven-day mean minimum of 4.0
mg/L, and that during the months of March through June, dissolved oxygen must not be less than
a one-day...
Board Considers Proposed Amendments to General Use... 
