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Year  Oldman River Upstream of Lethbridge
 Oldman River Downstream of Lethbridge
 Bow River Upstream of Calgary
 Bow River Downstream of Calgary
 Red Deer River Upstream of Red Deer
 Red Deer River Downstream of Red Deer
 North Saskatchewan River Upstream of Edmonton
 North Saskatchewan River Downstream of Edmonton
 Smokey or Peace Rivers at Watino
 Smokey or Peace Rivers at Ft. Vermilion
 Athabasca River at Athabasca
 Athabasca River at Old Fort
 
 
199678  87  96  76  76  86  91  66  84  86  91  90   
199783  84  100  87        97  71  83  88  92  90   
199888  80  97  82  83  80  93  77  91  94  90  95   
199997  86  97  84  87  75  86  81  90  86  91  91   
200095  91  99  89  90  86  90  85  93  93  97  94   
200196  95  100  86  91  93  98  86  94  88  99  97   
200277  75  100  92  95  90  97  90  90  91  93  94   
200390  89  98  90  94  89  98  74  91  93  97  95   
200496  94  100  89  93  89  97  74  87  82  90  92   
200573  72  100  77  80  85  88  79  89  90  97  94   
200693  92  100  84  85  73  98  83  97  97  100  97   
200794  87  87  87  78  82  93  85  94  88  91  93   
 

References and Related Online Materials

Oldman River Upstream of Lethbridge:

Government of Alberta Environment. (2008). River Water Quality Index Results for 2007-2008. Last updated June 30, 2008. http://environment.alberta.ca/01276.html (accessed July 9, 2010).

Notes:
--> Water quality is measured on a 1-100 scale, with 100 being the highest possible quality. Alberta Environment considers numbers from 96-100 as "excellent," 81-95 as "good," 66-80 as "fair," 46-65 as "marginal," and 0-45 as "poor."
--> Original data is from mid-year to mid-year (eg: 2005-2006). In this table, data from 2005-2006 is listed as 2005, data from 2006-2007 is listed as 2006, etc.
--> For a full description of methodologies used in this ranking system, please see http://www.environment.alberta.ca/01275.html.

Oldman River Downstream of Lethbridge:See reference for "Oldman River Upstream of Lethbridge."
Bow River Upstream of Calgary:See reference for "Oldman River Upstream of Lethbridge."
Bow River Downstream of Calgary:See reference for "Oldman River Upstream of Lethbridge."
Red Deer River Upstream of Red Deer:See reference for "Oldman River Upstream of Lethbridge."
Red Deer River Downstream of Red Deer:See reference for "Oldman River Upstream of Lethbridge."
North Saskatchewan River Upstream of Edmonton:See reference for "Oldman River Upstream of Lethbridge."
North Saskatchewan River Downstream of Edmonton:See reference for "Oldman River Upstream of Lethbridge."
Smokey or Peace Rivers at Watino:See reference for "Oldman River Upstream of Lethbridge."
Smokey or Peace Rivers at Ft. Vermilion:See reference for "Oldman River Upstream of Lethbridge."
Athabasca River at Athabasca:See reference for "Oldman River Upstream of Lethbridge."
Athabasca River at Old Fort:See reference for "Oldman River Upstream of Lethbridge."