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Water Quality Report

2007 AVERAGES - WATER TREATMENT PLANT - RAW AND FINISHED WATERS
CITY OF GRAND JUNCTION ENVIRONMENTAL LABORATORY SERVICES DIVISION
INORGANIC PARAMETERS
  
Kannah CreekFlowline(Raw Water)
Purdy MesaFlowline(Raw Water)
Finished City Water
Finished KannahCreek Water
 USEPA Limit
Turbidity 5.9 N.T.U. 2.3 N.T.U. 0.04 N.T.U.. 0.07 N.T.U. 0.3 N.T.U.
pH 8.0 S.U. 7.9 S.U. 7.6  S.U. 8.1 S.U. 6.5 - 8.5 S.U. 1
Temperature 12°C 11°C 11°C 8°C n/a
Fluoride 0.06 mg/L 0.1 mg/L 0.86 mg/L 0.09 mg/L 4.0 mg/L
Nitrate (as nitrogen) 0.2 mg/L 0.05 mg/L 0.06 mg/L None detected 10 mg/L
Nitrite (as nitrogen) None detected None detected None detected None detected 1.0 mg/L
Total Dissolved Solids 66 mg/L 124 mg/L 122 mg/L 134 mg/L 500 mg/L 1
Total Alkalinity 58 mg/L 83 mg/L 77 mg/L 82 mg/L n/a
Total Hardness  (as CaCO3) 55 mg/L 100 mg/L 96 mg/L 96 mg/L n/a
Calcium Hardness 40 mg/L 66 mg/L 67 mg/L 66 mg/L n/a
Magnesium Hardness 15 mg/L 34 mg/L 28 mg/L 30 mg/L n/a
Chloride 0.6 mg/L 1.3 mg/L 3.4 mg/L 2.1 mg/L 250 mg/L 1
Sulfate 5 mg/L 30 mg/L 28 mg/L 29 mg/L 250 mg/L 1
Chlorine residual WTP N/A N/A 1.4 mg/L 1.2 mg/L n/a
Orthophosphate None detected None detected None detected None detected n/a
METALS
 

Kannah Creek

Flowline(Raw Water)2
Purdy Mesa
Flowline(Raw Water)2
Finished
 City Water
Finished Kannah
Creek Water
USEPA Limit
Aluminum None detected None detected 0.008 mg/L 0.046 mg/L 0.2 mg/L 1
Antimony None detected None detected None detected None detected 0.006 mg/L
Arsenic None detected 0.001 mg/L  0.001 mg/L  0.001 mg/L  0.05 mg/L
Barium 0.027 mg/L 0.040 mg/L 0.04 mg/L 0.044 mg/L 2.0 mg/L
Beryllium None detected None detected None detected None detected 0.004 mg/L
Cadmium None detected None detected None detected None detected 0.005 mg/L
Calcium 14 mg/L 24 mg/L 24 mg/L 27 mg/L n/a
Chromium None detected None detected None detected None detected 0.1 mg/L
Copper 0.005 mg/L 0.006 mg/L  0.011 mg/L 0.006 mg/L 1.0 mg/L
Iron None detected None detected None detected None detected 0.3 mg/L 1
Lead None detected None detected None detected None detected 0.005 mg/L
Magnesium 4.4 mg/L 8.3 mg/L 8.9 mg/L 9.7 mg/L n/a
Manganese None detected None detected None detected 0.026 mg/L 0.05 mg/L 1
Mercury None detected None detected None detected None detected 0.002 mg/L
Nickel None detected None detected None detected 0.001mg/L 0.1 mg/L
Selenium None detected None detected None detected None detected 0.05 mg/L
Silver None detected None detected None detected None detected 0.1 mg/L 1
Sodium 3.7 mg/L 8.1 mg/L 9.1 mg/L 11.2 mg/L n/a
Thallium None detected None detected None detected  None detected 0.002 mg/L
Zinc None detected None detected 0.005 mg/L 0.013 mg/L 5.0 mg/L 1
MICROBIOLOGICAL PARAMETERS
 
Kannah CreekFlowline(Raw Water)
Purdy MesaFlowline(RawWater)
Finished City Water
Finished KannahCreek Water
USEPA Limit
Total coliform bacteria 721 cfu/100 mL 28 cfu/100 mL None detected None detected not present (in finished water)
E. coli bacteria 14 cfu/100 mL <1 cfu/100 ml None detected None detected not present (in finished water)
Heterotrophic plate count bacteria Not tested Not tested 44 cfu/mL 8 cfu/mL n/a
Giardia 220 cysts None detected None detected None detected 99.9% removal
Cryptosporidium 17 oocysts None detected None detected None detected n/a
ORGANIC CONTAMINANTS
    
Combined Raw Influent8
Finished City Water5
Finished KannahCreek Water5
 USEPA Limit
Total Trihalomethanes (THMs) ((4 compounds)) Not tested 40.41 ug/L 52.91 ug/L 80 ug/L
Haloacetic Acids (Total) ((HAA5)) Not tested 38.84 ug/L 34.88 ug/L 60 ug/L
ADDITIONAL ORGANIC COMTAMINANTS 7
Volatile Organic Compounds (VOCs)
   Not tested None detected None detected see note 4
Synthetic Organic Compounds (SOCs) -Regulated, 3 Not tested None detected None detected see note 4
 Synthetic Organic Compounds (SOCs) -Unregulated5 Not tested None detected  None detected n/a 
RADIOLOGICAL PARAMETERS
     Combined Raw Influent Finished City Water Finished KannahCreek Water  USEPA Limit
Gross alpha 5 <3 pCi/L <3 pCi/L 0.13 pCi/L 15 pCi/L
Gross beta 5 <8 pCi/L4 <8 pCi/L4 2.4 pCi/L3 50 pCi/L
Radium 228 6 <1 pCi/L4  <1 pCi/L 4 <1 pCi/L3 5 pCi/L 

 

        
1= Recommended limit
2= Dissolved metals
3= sampled on 1/15/01
4 = Sampled 7/2/01
5 = sampled in 2007
6 = sampled quarterly in 2004
7 = The EPA limit depends upon the parameter being tested; for a complete list of all parameters included in the VOC and SOC panels and their corresponding EPA limits please contact the Water Quality Lab at 970-243-9636.
8= analyses representative of combined raw water flowlines
None detected = values less than the Laboratory's reporting limit
n/a = no USEPA limit
*Kannah Creek Flowline not tested
< = less than
 

 
 
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