Versions of See prior versions of a law on LawServer 2024 Iowa Code 455B.199C – Alternative wastewater treatment technologies — legislative intent and purpose 2023 Iowa Code 455B.199C – Alternative wastewater treatment technologies — legislative intent and purpose 2022 Iowa Code 455B.199C – Alternative wastewater treatment technologies — legislative intent and purpose. 2020 Iowa Code 455B.199C – Alternative wastewater treatment technologies — legislative intent and purpose. 2018 Iowa Code 455B.199C – Alternative wastewater treatment technologies — legislative intent and purpose. 2016 Iowa Code 455B.199C – Alternative wastewater treatment technologies 2014 Iowa Code 455B.199C – Alternative wastewater treatment technologies – legislative intent and purpose. 2009 Iowa Code 455B.199C – Alternative wastewater treatment technologies — legislative intent and purpose