2024 Massachusetts General Laws ch. 21 sec. 34A – Board of certification of operators of wastewater treatment facilities; members; duties

2023 Massachusetts General Laws ch. 21 sec. 34A – Board of certification of operators of wastewater treatment facilities; members; duties

2022 Massachusetts General Laws ch. 21 sec. 34A – Board of certification of operators of wastewater treatment facilities; members; duties

2020 Massachusetts General Laws ch. 21 sec. 34A – Board of certification of operators of wastewater treatment facilities; members; duties

2019 Massachusetts General Laws ch. 21 sec. 34A – Board of certification of operators of wastewater treatment facilities; members; duties

2017 Massachusetts General Laws ch. 21 sec. 34A – Board of certification of operators of wastewater treatment facilities; members; duties

2016 Massachusetts General Laws ch. 21 sec. 34A – Board of certification of operators of wastewater treatment facilities; members; duties

2015 Massachusetts General Laws ch. 21 sec. 34A – Board of certification of operators of wastewater treatment facilities; members; duties

2014 Massachusetts General Laws ch. 21 sec. 34A – Board of certification of operators of wastewater treatment facilities; members; duties

2013 Massachusetts General Laws ch. 21 sec. 34A – Board of certification of operators of wastewater treatment facilities; members; duties

2009 Massachusetts General Laws ch. 21 sec. 34A – Board of certification of operators of wastewater treatment facilities; members; duties