Yearly Water Quality Data report tabulated by Chicago Department of Water Management. 

Reports by year

Reports by year

January 1 to December 31, 2023

January 1 to December 31, 2022

January 1 to December 31, 2021

January 1 to December 31, 2020

January 1 to December 31, 2019

January 1 to December 31, 2018

January 1 to December 31, 2017

January 1 to December 31, 2015

January 1 to December 31, 2014

January 1 to December 31, 2011