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 excellent for the irrigation of turf, ornamental landscaping, food crops, orchards, and vineyards. The nitrogen and phosphorus in the water provide fertilizer for plants and grass.

Reclaimed water is not treated for use in drinking or bathing. If you come into contact with reclaimed water, wash with soap and water from a drinking water faucet. If you or your child have consumed reclaimed water, it is unlikely to cause ill effects. However, if you or your child should get sick after consuming this water, inform your medical provider that reclaimed water was ingested. She/he will be able to determine if the illness is related to the water.

Like all water we deliver, the reclaimed water Tucson Water provides to customers is regulated by the Arizona Department of Environmental Quality (ADEQ). Reclaimed water delivered by Tucson Water is rated as Class A by ADEQ.

Parameter 2015 1
Inorganic Constituents
Alkalinity (as CaCO3) 164 mg/l
Arsenic 0.0041 mg/l
Boron 0.26 mg/l
Cadmium 2 < 0.001 mg/l
Calcium 75.9 mg/l
Chloride 157 mg/l
Copper 2 < 0.02 mg/l
Hardness (as CaCO3) 270 mg/l
Magnesium 19.5 mg/l
Phosphate (as P) 2.78 mg/l
Sodium 143 mg/l
Sulfate 175 mg/l
Nitrogen Forms
Ammonia Nitrogen 1.6 mg/l
Nitrate (as N) 7.45 mg/l
Nitrite (as N) 0.92 mg/l
Organic Nitrogen (Calculated) 1.5 mg/l
Total (Calculated) 7.99 mg/l
Reuse Permit
Turbidity 0.76 NTU
E. Coli 2 <1 MPN
pH 7.38 S.U.
Total Dissolved Solids 739 mg/l
Electrical Conductivity 1192 μS/cm
Residual Sodium Carbonate -2.11 meq/l
Sodium Adsorption Ratio (SAR) 3.79 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