Water Systems Marilynn Garibay and Tara Taylor

Where the UA gets its water: The University of Arizona uses water from three distinct sources. We pump water from out own regional aquifer wells We buy City of Tucson potable water We buy City of Tucson reclaimed water

Main Campus Source of water is from 3 wells and 5 booster pump stations connected to City of Tucson water system A new well is scheduled to come on line in June 2003 Distribution system is made up of 7 miles of pipe and serves 185 buildings.

Arizona Health Sciences Campus (AHSC) Source of water is 2 wells and 2 booster pump stations connected to the City of Tucson 2 miles of pipe Serves 40 buildings UMC Hospital is not a user

Water Usage throughout the UA Main Campus and AHSC campus: There are five main uses of the water system at the UA: Residential Use Commercial Use Industrial Use Irrigation Use Academic Building Use

Residential Use There are 20 dormitories on the Main campus. Water used at the dorms is for drinking, personal hygiene, and a little irrigation around them. Water use for this community is greater during fall and spring semesters

Commercial Use This use includes the Student Union, bookstores and intercollegiate athletics. Several facilities were not measured in 2002 Student Recreation center was one of them, and it is served by the City of Tucson water system Uses include drinking, cooking, restrooms, dishwashing, cleaning and swimming pools

Industrial Use One of the largest district chilled water loops in the world Used for cooling buildings, equipment and some refrigeration for cold rooms 13 cooling towers and 3 cooling plants are the major consumers of this water One reclaimed and the rest potable

Irrigation Use 50-55% of the irrigation on campus is supplied by reclaimed water Most turf areas are baseball and softball fields and the football practice field NO cross connections exist with the potable system Irrigation valve box colors are purple

Academic Building Use 163 academic buildings on the main campus and 40 on the AHSC campus have connections to potable water systems Uses: classrooms, research and teaching laboratories, restrooms, offices and water features, and labs

Campus Wells 7 wells Aggie, Architecture, CRB, Huachuca, Martin St., North and South Vary in depth from 480 ft to 700 ft deep Produce from valley fill aquifers Disinfections takes place at each well Produce gpm of water Have pressure tanks and sand separators New well will be about 700 ft deep and produce 400 gpm Idled wells because of low production are Martin St. and Aggie

City of Tucson Water Backup System The main campus potable water system is backed up by 5 connections. On the AHSC campus, two connections to city water back up the two wells

Reclaimed Water System Fed by two 12 inch mains that cross Campbell and just south of University They both feed a meter station near the east end of Hillebrand Pool The backbone main runs down the mall and around the north side of Old Main. Serves the Main Campus plant, baseball field, softball field, and practice football field

De-ionized Water System 13 buildings are supplied with de-ionized (DI) water for use in cleaning lab-ware and research It is supplied by the Main Campus plant’s reverse osmosis unit

City of Tucson Water Quality Sample Point SP-866 SP-870SP-886SP-888SP-884SP-800SP-795 Location Aver age Ma xMin Park & Edison Campbell & Edison 1 st St. & Wilson 9 th St. & Warren 4 th & Tucson 1 st St. & 2 nd Ave. 2 nd Ave. & Lester Chlorine (mg/l) /12 / /5/ /5/ /26 / /2 6/ /3/ /3/ 03 Fluoride (mg/l F) /13 / /7/ /5/ /26 / / 23/ /3/ /3/ 03 Hardness (mg/l CaCO 3 ) /14 / /15/ /7/ /28 /0371 4/1/ /7/ /7/ 03 Nitrate (mg/l N) /13 / /7/ /5/ /26 /032 12/ 23/ /3/ /3/ 03 Sodium (mg/l Na) /14 /0355 1/15/ /7/ /28 /0332 4/1/ /7/ /7/ 03 TDS (mg/l) /12 / /5/ /5/ /26 / /2 6/ /3/ /3/ 03 pH (std. units) /12 / /5/ /5/ /26 / /2 6/ /3/ /3/ 03

Reclaimed Water Quality Inorganic Constituents UnitsAnalysis Alkalinity ( as CaCO 3 ) mg/l247 Arsenicmg/l0.005 Boronmg/l0.3 Cadmiummg/l<0.004 Calciummg/l72.5 Chloridemg/l103.7 Coppermg/l0.02 Hardness (as CaCO3) mg/l227 Magnesiummg/l13.6 Phosphate (as P)mg/l0.95 Sodiummg/l133 Sulfatemg/l137 Nitrogen Forms Ammonia Nitrogenmg/l3.13 Nitrate (as N)mg/l5.12 Nitrite (as N)mg/l0.29 Organic Nitrogenmg/l1.9 Total (Calculated)mg/l10.46 Reuse Permit TurbidityNTU2.92 Fecal Coliformcfu<2.0 pHst. units7.49 Salt Level Total Dissolved Solids mg/l671 Electrical Conductivity  S/cm 1079 Residual Sodium Carbonate meq/l0.21 Other Sodium Adsorption Ratio (SAR) meq/l3.76

Remember! Water is a precious commodity! Don’t waste it!