2019 Washington Code > Chapter 70.119 – Public water supply systems — Operators

2018 Washington Code > Chapter 70.119 – Public water supply systems — Operators

2016 Washington Code > Chapter 70.119 – Public water supply systems–Operators

2015 Washington Code > Chapter 70.119 – Public water supply systems–Operators

2014 Washington Code > Chapter 70.119 – Public water supply systems — Operators

2013 Washington Code > Chapter 70.119 – Public water supply systems — Operators