TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE F: PUBLIC WATER SUPPLIES
CHAPTER I: POLLUTION CONTROL BOARD
PART 611 PRIMARY DRINKING WATER STANDARDS
SECTION 611.524 SANITARY SURVEYS
Section 611.524 Sanitary Surveys
a) Requirement to conduct a sanitary survey.
1) Suppliers that do not collect five or more routine samples per month must undergo a sanitary survey at least once every five years, except that non-CWS suppliers using only disinfected groundwater, from a source that is not under the direct influence of surface water, must undergo a sanitary survey at least once every ten years. The Agency or, for a non-CWS, Public Health must review the results of each sanitary survey to determine whether the existing monitoring frequency is adequate and what additional measures, if any, the supplier needs to undertake to improve drinking water quality.
2) In conducting a sanitary survey of a PWS using groundwater, information on sources of contamination within the delineated wellhead protection area that was collected in the course of developing and implementing the wellhead protection program should be considered instead of collecting new information, if the information was collected since the last time the PWS was subject to a sanitary survey.
b) Sanitary surveys must be performed by the Agency. The PWS is responsible for ensuring that the survey takes place.
c) A sanitary survey conducted by the Agency for the purposes of Subpart S of this Part may be used to meet the sanitary survey requirements of this Section.
BOARD NOTE: Derived from 40 CFR 141.21(d) (2006), as amended at 71 Fed. Reg. 65574 (Nov. 8, 2006).
(Source: Amended at 31 Ill. Reg. 11757, effective July 27, 2007)