P.O. Box 669, Billings, MT 59103-0669    e-mail: bhcc@msubillings.edu

  
   
   

Water Quality: pH (Yearly Average) 
  

   
YEAR

SU
90-91 7.46
91-92 7.38
92-93 7.34
93-94 7.37
94-95 7.19
95-96 7.43
1996 7.37
1997 7.42
1998 7.42
1999 7.45
2000 7.5
2001 8.1

Trend:   INCREASING

* pH = solution's Hydrogen-ion Acid/Alkaline concentration

Source:  Billings Public Utilities Dept. 406-657-8346
http://ci.billings.mt.us/government/utilities/parameters.html

Caveats and Definitions
The Maximum Contaminant Level (MCL) set by the State of Montana for pH = 6.9 to 9.0. (7 is basic.) 

The Billings Public Utilities Department changed from a fiscal year to a calendar year in 1996.