Service Description: Every two years, DEQ is required by the federal Clean Water Act to conduct a comprehensive analysis of Idaho's water bodies to determine whether they meet state water quality standards and support beneficial uses or if additional pollution controls are needed. This analysis is summarized in Idaho's Integrated Report from data derived from Idaho 305(b) Streams/Lakes, and DEQ's ATTAINS (Water Quality Assessment Database). The Clean Water Act protects and preserves water quality in the United States by protecting the uses designated for specific waterbodies. The results of the 305(b) assessments are not raw data but rather statements of the degree to which each water body supports the uses designated in state or tribal water quality standards. For example, two rivers may have the exact same chemical and physical makeup, but one of the rivers may be considered as impaired because of different water quality standards
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Description: Sections 305(b) and 314 of the Clean Water Act (CWA) require states, territories, and authorized tribes to provide biennial reports to EPA on the condition of waters within their boundaries. EPA regulations at 40 CFR 130.7 require states to provide biennial submissions of impaired waters lists. EPA provides guidance on these reports in a way that supports the Agency's strategy for achieving a broad-scale, national inventory of water quality conditions. The guidance is from EPA to states, territories, authorized tribes, and interstate commissions ("jurisdictions") to help states prepare and submit Section 305(b) reports to EPA. Use of the integrated report (IR) format provides jurisdictions a recommended reporting format and suggested content to be used in developing a single document that integrates the reporting requirements of Sections 303(d), 305(b), and 314. This format allows jurisdictions to report on the water quality standards attained for all waters, document the availability of data and information for each segment, identify certain trends in water quality conditions, and set priorities for protecting and restoring the health of the nation's aquatic resources. Section 305(b) of the Clean Water Act requires each state to conduct water quality surveys to determine a water body's overall health, including whether or not basic uses are being met. States, tribes, and other jurisdictions define appropriate uses for a waterbody and incorporate these uses into water quality standards that are approved by EPA. Water body uses include aquatic life protection, fish and shellfish production, drinking water supply, swimming, boating, fishing, and agricultural irrigation, among others. 2022 Final ID 305B Streams and Waterbodies.
Copyright Text: Idaho DEQ,, EPA May 2022
Spatial Reference: 102605 (8826)
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