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 90 -300 gpm of water • Have pressure tanks and 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 Location Chlorine (mg/l) Fluoride (mg/l F) Hardness (mg/l Ca. CO 3) Nitrate (mg/l N) Sodium (mg/l Na) TDS (mg/l) p. H (std. units) SP-866 SP-870 SP-886 SP-888 SP-884 SP-800 SP-795 Ma x Min Park & Edison Campbell & Edison 1 st St. & Wilson 9 th St. & Warren 4 th & Tucson 1 st St. & 2 nd Ave. & Lester 0. 87 0. 9 8 0. 6 8 0. 52 0. 7 0 0. 1 5 Aver age 139 214 69 1. 85 3. 3 0 0. 6 6 46 56 32 290 405 183 7. 96 8. 1 3 7. 7 7 0. 94 3/12 /03 0. 58 3/13 /03 129 3/14 /03 1. 5 3/13 /03 50 3/14 /03 310 3/12 /03 8 3/12 /03 0. 9 3/5/03 0. 64 1/7/03 203 1/15/0 3 2. 8 1/7/03 55 1/15/0 3 195 7. 95 3/5/03 0. 68 3/5/ 03 0. 15 3/5/ 03 69 3/7/ 03 0. 66 3/5/ 03 32 3/7/ 03 183 3/5/ 03 7. 97 3/5/ 03 0. 98 2/26 /03 0. 49 2/26 /03 106 2/28 /03 1. 1 2/26 /03 48 2/28 /03 282 2/26 /03 8. 13 2/26 /03 0. 89 2/26 /03 0. 48 12/2 3/02 71 4/1/ 03 2 12/2 3/02 32 4/1/ 03 293 2/26 /03 8. 09 2/26 /03 0. 83 3/3/ 03 0. 6 3/3/ 03 184 3/7/ 03 1. 6 3/3/ 03 56 3/7/ 03 405 3/3/ 03 7. 77 3/3/ 03 0. 86 3/3/ 03 0. 7 1/3/ 03 214 1/7/ 03 3. 3 1/3/ 03 52 1/7/ 03 361 3/3/ 03 7. 81 3/3/ 03
Reclaimed Water Quality Nitrogen Forms Analysis Alkalinity (as Ca. CO 3) mg/l 247 Arsenic mg/l 0. 005 Boron mg/l 0. 3 Cadmium mg/l <0. 004 Calcium mg/l 72. 5 Chloride mg/l 103. 7 Copper mg/l 0. 02 Hardness (as Ca. CO 3) mg/l 227 Magnesium mg/l 13. 6 Phosphate (as P) mg/l 0. 95 Sodium mg/l 133 Sulfate mg/l 137 mg/l 3. 13 Nitrate (as N) mg/l 5. 12 Nitrite (as N) mg/l 0. 29 Organic Nitrogen mg/l 1. 9 Total (Calculated) Units Ammonia Nitrogen Inorganic Constituents mg/l 10. 46 Reuse Permit NTU 2. 92 cfu <2. 0 st. units 7. 49 Salt Level mg/l 671 Electrical Conductivity m. S/cm 1079 Residual Sodium Carbonate meq/l 0. 21 Other meq/l 3. 76 Turbidity Fecal Coliform p. H Total Dissolved Solids Sodium Adsorption Ratio (SAR)
Remember! • Water is a precious commodity! • Don’t waste it!
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