(415 ILCS 5/17.1) (from Ch. 111 1/2, par. 1017.1)
    Sec. 17.1. (a) Every county or municipality which is served by a community water supply well may prepare a groundwater protection needs assessment. The county or municipality shall provide notice to the Agency regarding the commencement of an assessment. Such assessment shall consist of the following at a minimum:
        (1) Evaluation of the adequacy of protection afforded
    
to resource groundwater by the minimum setback zone and, if applicable, the maximum setback zone;
        (2) Delineation, to the extent practicable, of the
    
recharge area outside of any applicable setback zones but contained within any area over which the county or municipality has jurisdiction or control;
        (3) Identification and location of potential primary
    
and potential secondary sources and potential routes within, and if appropriate, in proximity to the delineated recharge area for each such well;
        (4) Evaluation of the hazard associated with
    
identified potential primary and potential secondary sources and potential routes contained within the recharge area specified according to subparagraph (a)(2) of this Section, taking into account the characteristics of such potential sources and potential routes, the nature and efficacy of containment measures and devices in use, the attenuative qualities of site soils in relation to the substances involved, the proximity of potential sources and potential routes and the nature, rate of flow, direction of flow and proximity of the uppermost geologic formation containing groundwater utilized by the well;
        (5) Evaluation of the extent to which existing local
    
controls provide, either directly or indirectly, some measure of groundwater protection; and
        (6) Identification of practicable contingency
    
measures, including provision of alternative drinking water supplies, which could be implemented in the event of contamination of the water supply.
    (b) Upon completion of the groundwater protection needs assessment, the county or municipality shall publish, in a newspaper of general circulation within the county or municipality, notification of the completion of such assessment and of the availability of such assessment for public inspection. At a minimum, such assessment shall be available for inspection and copying, at cost, by the general public during regular business hours at the offices of such county or municipality. Information within the groundwater protection needs assessment which is claimed to be confidential, privileged or trade secret information shall be accorded protection by the county or municipality pursuant to the Freedom of Information Act, as amended. A copy of the assessment shall be filed by the county or municipality with the Agency and any applicable regional planning committee within 30 days of completion.
    (c) If a county or municipality has not commenced to prepare a groundwater protection needs assessment for a community water supply which is investor owned, then said owner may notify the county or municipality in writing of its intent to prepare such an assessment. The owner may proceed with the preparation of an assessment unless the county or municipality, within 30 days of the receipt of the written notice, responds in writing that an assessment will be undertaken. Upon receipt of such a written response, the owner shall not proceed for a period of 90 days. After this period, the owner may proceed to prepare an assessment if the county or municipality has not commenced such action. The owner shall provide notice to the Agency regarding the commencement of an assessment. An assessment which is prepared by such an owner shall be done in accordance with the provisions of subsection (a) of this Section. Upon completion of the assessment, the owner shall provide copies of such assessment to the county or municipality, any applicable regional planning committee and the Agency within 30 days.
    (d) The Agency shall implement a survey program for community water supply well sites. The survey program shall be organized on a priority basis so as to efficiently and effectively address areas of protective need. Each well site survey shall consist of the following at a minimum:
        (1) Summary description of the geographic area within
    
a 1,000 foot radius around the wellhead;
        (2) Topographic or other map of suitable scale of
    
each well site denoting the location of the wellhead, the 1,000 foot radius around the wellhead, and the location of potential sources and potential routes of contamination within this zone;
        (3) A summary listing of each potential source or
    
potential route of contamination, including the name or identity and address of the facility, and a brief description of the nature of the facility; and
        (4) A general geologic profile of the 1,000 foot
    
radius around the wellhead, including depth and age of the well, construction of the casing, formations penetrated by the well and approximate thickness and extent of these formations.
    (e) Upon completion of a well site survey, the Agency shall provide the county or municipality, any applicable regional planning committee and, where applicable, the owner and operator of the community water supply well, with a report which summarizes the results of the survey.
    (f) Upon receipt of a notice of commencement of a groundwater protection needs assessment from a county or municipality pursuant to subsection (a), or from an owner of an investor owned community water supply pursuant to subsection (c), the Agency may determine that a well site survey is not necessary for that locale. If the county, municipality or other owner does not complete the assessment in a timely manner, then the Agency shall reconsider the need to conduct a survey.
    (g) The Agency may issue an advisory of groundwater contamination hazard to a county or municipality which has not prepared a groundwater protection needs assessment and for which the Agency has conducted a well site survey. Such advisory may only be issued where the Agency determines that existing potential primary sources, potential secondary sources or potential routes identified in the survey represent a significant hazard to the public health or the environment. The Agency shall publish notice of such advisory in a newspaper of general circulation within the county or municipality and shall furnish a copy of such advisory to any applicable regional planning committee.
    (h) Any county or municipality subject to subsection (a) above, but having a population of less than 25,000 or 5,000 persons, respectively, may request, upon receipt of a well site survey report, the Agency to identify those potential primary sources, potential secondary sources and potential routes which represent a hazard to the continued availability of groundwaters for public use, given the susceptibility of the groundwater recharge area to contamination. Such Agency action may serve in lieu of the groundwater protection needs assessment specified in subsection (a) of this Section. The Agency shall also inform any applicable regional planning committee regarding the findings made pursuant to this subsection.
    (i) Upon request, the Agency and the Department of Natural Resources may provide technical assistance to counties or municipalities in conducting groundwater protection needs assessments.
(Source: P.A. 89-445, eff. 2-7-96.)