Reclaimed Water Quality

Tucson Water uses some of its recycled water to produce reclaimed water, which is specially treated for applications such as irrigation, dust control, fire fighting, and industrial uses. Reclaimed water is primarily used for the irrigation of turf grass and landscape plants.

Reclaimed water is not treated for use in drinking or bathing. Like all water we deliver, the reclaimed water Tucson Water provides to customers is regulated by the Arizona Department of Environmental Quality exiting Tucson Water website (ADEQ). Reclaimed water delivered by Tucson Water is rated as Class A by ADEQ.

Parameter 2018 1
Inorganic Constituents
Alkalinity (as CaCO3) 207 mg/l
Arsenic 0.0046 mg/l
Boron 0.2545 mg/l
Cadmium 2 < 0.001 mg/l
Calcium 92.6 mg/l
Chloride 142 mg/l
Copper 2 < 0.02 mg/l
Hardness (as CaCO3) 300 mg/l
Magnesium 16.66 mg/l
Phosphate (as P) 0.42 mg/l
Sodium 140 mg/l
Sulfate 171 mg/l
Nitrogen Forms
Ammonia Nitrogen 0.96 mg/l
Nitrate (as N) 4.67 mg/l
Nitrite (as N) 0.79 mg/l
Organic Nitrogen (Calculated) 1.5 mg/l
Total (Calculated) 7.92 mg/l
Reuse Permit
Turbidity 0.666 NTU
E. Coli 2 <1 MPN
pH 7.18 S.U.
Total Dissolved Solids 757 mg/l
Electrical Conductivity 1198 μS/cm
Residual Sodium Carbonate -1.86 meq/l
Sodium Adsorption Ratio (SAR) 3.52 meq/l
Water Quality Abbreviations
CaCO3calcium carbonate
cfu — colony forming units
mg/l — milligrams per liter
meq/l — milliequivalents per liter
μS/cm — microSeimens/centimeter
N — nitrogen
NTU — nephelometric turbidity units
P — phosphorus
S.U. — standard unit


1  Annual Average. Source: Tucson Water’s Water Quality Laboratory.
2  Average is less than the detection limit