Water Quality Data Archives

Every month Tucson Water collects samples at 247 locations within 10 different water quality zones of the main water system. The following monthly reports show data collected by sample points and water quality zone for these inorganic parameters: hardness, total dissolved solids (TDS), sodium, pH, and water temperature. Inorganic parameters may affect the taste, odor and feel of tap water and are not regulated.

Access Inorganic Water Quality Archives for years 1997 through 2008.

The USEPA requires Tucson Water, along with all public water systems nationwide, to monitor, detect and eliminate bacteria and viruses such as coliform and E. coli. The following monthly reports show data by sample point and water quality zone for the presence or absence of total coliform bacteria and E. coli bacteria, water temperature and the level of chlorine disinfectant.

Access Microbiological Water Quality Archives for years 1997 through 2008.

The following monthly reports show the variability in pH, chlorine, water temperature, TDS, and sodium concentrations that occur among water quality zones. Seasonal changes, the amount of chlorine present, and the influences of different water sources may affect the variability of these parameters.

Access Descriptive Statistics Water Quality Archives for years 1997 through 2008.