2023 Washington Code 82.21.030 – Pollution tax

2022 Washington Code 82.21.030 – Pollution tax

2020 Washington Code 82.21.030 – Pollution tax

2019 Washington Code 82.21.030

2018 Washington Code 82.21.030 – Pollution tax

2016 Washington Code 82.21.030 – Pollution tax

2015 Washington Code 82.21.030 – Pollution tax

2014 Washington Code 82.21.030 – Pollution tax

2013 Washington Code 82.21.030 – Pollution tax

2009 Washington Code 82.21.030 – Pollution tax