35 Ill. Adm. Code 378.203
Unprotected Waters
Section 378
Section 378.203 Unprotected
Waters
Unprotected waters are not
required to comply with the fecal coliform standards of 35 Ill. Adm. Code
302.209 and 302.306. Characteristics of unprotected waters include but are not
limited to the following, and waters must possess one or more of these characteristics
to be classified as unprotected waters:
a) Waters with average depths of two feet or less and no
pronounced deep pools during the summer season;
b) Waters containing physical obstacles sufficient to prevent
access or primary contact activities; or
c) Waters with adjacent land uses sufficient to discourage
primary contact activities.