Services providedWater and Sewer City of ChelseaWebsitehttps://www.chelseama.gov/Phone617-466-4209Community Letter 2023 /node/6436Current Year (2023) Annual Water Quality Test Result/Community LetterPrevious Annual Water Quality Test Results/Community LettersChelsea 2022 Annual Water Quality Test Result/Community LetterChelsea 2021 Annual Water Quality Test Result/Community LetterChelsea 2020 Annual Water Quality Test Result/Community Letter [PDF/103KB]Chelsea 2019 Annual Water Quality Test Results/Community Letter [PDF/108KB]Chelsea 2018 Annual Water Quality Test Results/Community Letter [PDF/48KB]Chelsea 2017 Annual Water Quality Test Results/Community Letter [PDF/3.6MB]Chelsea 2016 Annual Water Quality Test Results/Community Letter [PDF/103KB]Chelsea 2015 Annual Water Quality Test Results/Community Letter [PDF/81KB]Chelsea 2014 Annual Water Quality Test Results/Community Letter [PDF/108KB]Chelsea 2013 Annual Water Quality Test Results/Community Letter [PDF/228KB]Chelsea 2012 Annual Water Quality Test Results/Community Letter [PDF/78KB]Chelsea 2011 Annual Water Quality Test Results/Community Letter [PDF/167KB]