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MUM Water Filters
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MUM Water Filters
MUM Water Filters    
MUM has several dozen water filter systems around campus.  See the table below for locations of these systems.

Types of water filter systems

The University maintains the following types of water filter system on campus:
  • 1-stage:  A system with a single filter, an OmniPure K2586, which reduces chlorine taste and odor, particles larger than 0.5 micron, and lime scale. 
  • Fast 2-stage:  A system with two filters, a Pentek CW-F and a Pentek CBR2-10, which eliminate sediment, MTBE (a gasoline additive often found in groundwater), VOCs (volatile organic compounds), lead, cysts, and most chlorine.
  • Slow 2-stage:  A 2-stage system with two filters, a Pentek CW-F and a Pentek CBR2-10R, which filter out the same contaminants as the fast 2-stage system.  The water flows more slowly, giving better filtration but slower service.
  • DuPont 2-stage: A system with two filters, a DuPont Quick Twist 3 micron filter and a DuPont Quick Twist 0.5 micron filter, which reduce chlorine, sediment, heavy metals, cysts, and VOCs (volatile organic compounds).
  • 3-stage:  A special system for dining hall cooking water that eliminates more chlorine than a 2-stage system.
  • RO: A reverse osmosis filtration system.
  • Rain:  A special rain water catchment and RO filtration system in the Sustainable Living Center.
See below for detailed specs on these filters.

Water filter system locations
 Building Location within building  1-stage 
 Slow 2-stage  DuPont 2-stage  3-stage  RO  Rain
 Argiro  South dining, northwest corner    x          
 Argiro  South dining, northeast corner    x          
 Argiro  North dining    x          
 Argiro  Cafe (for use by MUM students only)            x  
 Argiro  Outside student lounge  x            
 Argiro  Kitchen          x    
 Art Center
 Upper floor, near north bathrooms  x            
 Art Center  Upper floor, near south bathrooms  x            
 Dome Market  North produce area ($0.20/gal)
 Dreier  Basement, near bathrooms    x          
 Dreier  First floor, near bathrooms    x          
 Dreier  Second floor, near bathrooms    x          
 Headley  Kitchen      x        
 Henn  Kitchen      x        
 Hildenbrand  North wing, basement bathroom      x        
 Hildenbrand  North wing, kitchen near meditation room       x      
 North wing, room 135 (tea room)
 Hildenbrand  North wing, opposite room 124        x      
 Hildenbrand  North wing, opposite room 224        x      
 Hildenbrand  North wing, opposite room 236        x      
 Hildenbrand  South wing, basement kitchen      x        
 Ladies' Dome  Inside lobby    x          
 Library  Basement, outside southwest bathrooms  x            
 Library  Upstairs, near east entrance  x            
 McLaughlin  First floor, north corridor      x        
 Men's Dome  Bathroom corridor    x          
 Rec Center  Outside women's room  x            
 Rec Center  Outside men's room  x            
 Science Wing  North corridor  x            
 Sust. Living Bldg.  Main corridor              x
 Swimming Pool  Bathhouse lobby  x            
 Veda Bhavan  Main lobby      x        
 Verrill  Outside northwest bathrooms
 Verrill  Outside southeast bathrooms  x            
 106  Sink near laundry      x        
 107  Sink near laundry      x        
 109  Sink near laundry      x        
 110  Sink near laundry      x        
 111  Sink near laundry      x        
 112  Sink near laundry      x        
 113  Kitchen      x        
 140  Laundry      x        
 141  Laundry      x        
 142  Laundry      x        
 143  Laundry      x        
 144  Laundry      x        
 145  Kitchen      x        
 146  Kitchen      x        
 147  Kitchen      x        
 148  Kitchen      x        
 149  Kitchen      x        
 150  Kitchen and sink near laundry      x        
 152  Kitchen      x        
 153  Kitchen      x        


All water filter systems on this list, except the systems in the Sustainable Living Building, the Dome Market, and the Argiro Cafe, are maintained by MUM Facilities Management.  The rain water catchment and filtration system in the Sustainable Living Building is maintained by the MUM Sustainable Living department. The reverse osmosis system in the Dome Market is maintained by Coster Engineering.  The reverse osmosis system in the Argiro Cafe is maintained by Student Government.

Blue tag

At most of water filter system locations, there is a blue tag that tells you when the filters were last changed.  This tag is as near as practical to the faucet that gives the filtered water.  If there is a cabinet under the faucet, the tag is usually in the cabinet.


The Golden Dome Market carries several brands of spring water in 1 liter and 1 gallon bottles.

Everybody's has several 6-stage reverse osmosis (RO) machines and charges 25 cents per gallon for water from these machines. For those who wish to add minerals to RO water, Everybody's carries ConcenTrace Trace Mineral Drops, which can remineralize water for about 10 cents a gallon.  

Everybody's also carries several brands of spring water in 1 liter, 1 gallon, 2.5 gallon, and 5 gallon bottles.  

Crystal Clear Water Company (641-472-4004, delivers bottled water anywhere in Fairfield.
Sudden bad taste in filtered water
Occasionally, filtered water on campus may suddenly acquire a bad taste. This is usually due to the Fairfield Water Department adding extra chlorine to the water. This is called a “chlorine shock”. A chlorine shock usually lasts no more than a day, after which water taste returns to normal. The purpose of a chlorine shock is to prevent growth of bacteria, and it is usually done when the weather suddenly warms. Since MUM filtered water starts with Fairfield tap water, the extra chlorine is passed on to MUM's filters, which remove most but not all of the chlorine.
Sudden changes in filtered water quality are generally not due to deterioration of filters. Filter deterioration usually results in slow degradation of water quality, which is normally avoided with regular water filter changes by MUM Facilities Management.

Detailed specs on the water filters we use on campus

The OmniPure K2586 water filter (used in the 1-stage systems listed above) is an activated carbon and polyphosphate filter that reduces chlorine taste and odor, particles larger than 0.5 micron, and lime scale.
  • Reduces chlorine by 90–95%
  • Reduces bad taste and odor
  • Flow rate: 0.5 GPM (gallons per minute)
  • Temp Range: 35–100° F 
The Pentek CW-F string wound polypropylene whole house filter (used in the 2-stage systems listed above) is designed to reduce extra fine sand, dirt, silt, rust, and scale particles.
  • 10 micron rating 
  • Reduces sand, rust, sediment, silt, dirt and scale particles 
  • Flow rate: 10 GPM
  • Temp Range: 40–165° F 
The Pentek CBR2-10 (used in the fast 1-stage systems listed above) is a carbon-briquette multimedia water filter that removes lead, volatile organic compounds (VOC), MTBE (a gasoline additive often found in groundwater), extra-fine sediment, bad taste and odor, and chlorine taste and odor.
  • 0.5 micron rating 
  • Temperature range: 40–165° F 
  • Flow rate: 0.5–1.0 GPM 
  • NSF Standard 42 test and certified 
  • Removes chlorine taste and odor, cysts, lead, VOC, MTBE, extra fine sediment, lead, and mercury
  • Removes 99.95% of cryptosporidium, giardia, entamoeba, and toxoplasmacysts 
The Pentek CBR2-10R (used in the slow 1-stage systems listed above) is the same as the CBR2-10 filter described above, except that the flow is restricted to 0.6 GPM.  This allows for better contact of the water with the filter media, which improves filtration.
In the Dome Market, the water machine in the north produce area is a multistage RO (reverse osmosis) system made by Coster Engineering . The multistage process includes sediment filter, carbon filter, RO, UV light, and remineralization. See .
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