35 ILCS 105/
2021 Illinois Compiled Statutes|Chapter 55 - COUNTIES|55 ILCS 5/ - Counties Code.|Article 5 - Powers And Duties Of County Boards

, except newly constructed buildings and newly installed impervious paved surfaces.  Disputes regarding an exception shall be determined by a mutually agreed upon arbitrator paid by the disputing party or parties.(e)                     Before the stormwater management planning committee recommends to the county board a stormwater management plan for the county or a portion thereof, it shall submit the plan to the Office of Water Resources of the Department of Natural Resources for review and recommendations. The Office, in reviewing the plan, shall consider such factors as impacts on the levels or flows in rivers and streams and the cumulative effects of stormwater discharges on flood levels. The Office of Water Resources shall determine whether the plan or ordinances enacted to implement the plan complies with the requirements of subsection (f). Within a period not to exceed 60 days, the review comments and recommendations shall be submitted to the stormwater management planning committee for consideration. Any amendments to the plan shall be submitted to the Office for review.(f) Prior to recommending the plan to the county board, the stormwater management planning committee shall hold at least one public hearing thereon and shall afford interested persons an opportunity to be heard. The hearing shall be held in the county seat. Notice of the hearing shall be published at least once no less than 15 days in advance of the hearing in a newspaper of general circulation published in the county. The notice shall state the time and place of the hearing and the place where copies of the proposed plan will be accessible for examination by interested parties. If an affected municipality having a stormwater management plan adopted by ordinance wishes to protest the proposed county plan provisions, it shall appear at the hearing and submit in writing specific proposals to the stormwater management planning committee. After consideration of the matters raised at the hearing, the committee may amend or approve the plan and recommend it to the county board for adoption.The county board may enact the proposed plan by ordinance. If the proposals for modification of the plan made by an affected municipality having a stormwater management plan are not included in the proposed county plan, and the municipality affected by the plan opposes adoption of the county plan by resolution of its corporate authorities, approval of the county plan shall require an affirmative vote of at least two-thirds of the county board members present and voting. If the county board wishes to amend the county plan, it shall submit in writing specific proposals to the stormwater management planning committee. If the proposals are not approved by the committee, or are opposed by resolution of the corporate authorities of an affected municipality having a municipal stormwater management plan, amendment of the plan shall require an affirmative vote of at least two-thirds of the county board members present and voting.(g) The county board may prescribe by ordinance reasonable rules and regulations for floodplain or stormwater management and for governing the location, width, course, and release rate of all stormwater runoff channels, streams, and basins in the county, in accordance with the adopted stormwater management plan. Land, facilities, and drainage district facilities used for production agriculture as defined in subsection (d) shall not be subjected to regulation by the county board or stormwater management committee under this Section for floodplain management and for governing location, width, course, maintenance, and release rate of stormwater runoff channels, streams and basins, or water discharged from a drainage district.  These rules and regulations shall, at a minimum, meet the standards for floodplain management established by the Office of Water Resources and the requirements of the Federal Emergency Management Agency for participation in the National Flood Insurance Program. The Commission may not impose more stringent regulations regarding water quality on entities discharging in accordance with a valid National Pollution Discharge Elimination System permit issued under the Environmental Protection Act.(h) In accordance with, and if recommended in, the adopted stormwater management plan, the county board may adopt a schedule of reasonable fees as may be necessary to mitigate the effects of increased stormwater runoff resulting from new development based on actual costs. The fees shall not exceed the cost of satisfying the onsite stormwater retention or detention requirements of the adopted stormwater management plan. The fees shall be used to finance activities undertaken by the county or its included municipalities to mitigate the effects of urban stormwater runoff by providing regional stormwater retention or detention facilities, as identified in the county plan. The county board shall provide for a credit or reduction in fees for any onsite retention, detention, drainage district assessments, or other similar stormwater facility that the developer is required to construct consistent with the stormwater management ordinance. All these fees collected by the county shall be held in a separate fund, and shall be expended only in the watershed within which they were collected.(i) For the purpose of implementing this Section and for the development, design, planning, construction, operation, and maintenance of stormwater facilities provided for in the stormwater management plan, a county board that has established a stormwater management planning committee pursuant to this Section may cause an annual tax of not to exceed 0.20% of the value, as equalized or assessed by the Department of Revenue, of all taxable property in the county to be levied upon all the taxable property in the county or occupation and use taxes of 1/10 of one cent. The property tax shall be in addition to all other taxes authorized by law to be levied and collected in the county and shall be in addition to the maximum tax rate authorized by law for general county purposes. The 0.20% limitation provided in this Section may be increased or decreased by referendum at a general election in accordance with the provisions of Sections 18-120, 18-125, and 18-130 of the Property Tax Code