2024 40 CFR 20.6 – State certification

2023 40 CFR 20.6 – State certification

2022 40 CFR 20.6 – State certification

2021 40 CFR 20.6 – State certification

2020 40 CFR 20.6 – State certification

2019 40 CFR 20.6 – State certification

2016 40 CFR 20.6 – State certification

2015 40 CFR 20.6 – State certification

2014 40 CFR 20.6 – State certification