2024 Iowa Code 455E.4 – Groundwater protection goal

2023 Iowa Code 455E.4 – Groundwater protection goal

2022 Iowa Code 455E.4 – Groundwater protection goal

2020 Iowa Code 455E.4 – Groundwater protection goal

2018 Iowa Code 455E.4 – Groundwater protection goal

2016 Iowa Code 455E.4 – Groundwater protection goal

2014 Iowa Code 455E.4 – Groundwater protection goal.

2009 Iowa Code 455E.4 – Groundwater protection goal