Pre-2024 Assessment Summaries

Assessments for cycles prior to 2004 were conducted using a different methodology than those conducted for later cycle. This methodology differed significantly from more recent assessment procedures, and do not contain the same detailed information newer assessments have. Additionally, these assessments were conducted before the introduction of the "integrated report”, which combined both the Section 305(b) report and Section 303(d) list. Therefore, these assessments do not use the familiar "Overall Assessment Category" designations.

Due to the limited amount of information and its incompatibility with the current assessment format, no summarization is provided for these assessment cycles.

The original format of the individual assessments is preserved as much as possible to reflect the official submission for those 305(b) and 303(d) reports.

Additional information for the 2000 assessment cycle

The 2000 assessment cycle was unique in that although the US EPA rules at the time required submittal of 303(d) lists every two years, states were not required to submit a 2000 list due to uncertainty over proposed EPA 303(d) rules. The rule changes were later withdrawn.

Iowa conducted its own 305(b) and 303(d) lists, but the official EPA record does not contain summary information for the 2000 cycle.