Water Quality Trends

Project Summary

Water Quality Trends

Biotic Index
Dissolved Oxygen
Fecal Coliform Bacteria
Nitrate Nitrogen
Total Phosphorus

Water Quality Trends
Fecal Coliform Bacteria

Bacteria occur natural in water, air and soil. However, some bacteria are associated with water borne pathogens and wastewater pollution. Fecal coliform bacteria are often used as an indicator of the presence of other pathogens in surface water. The recommended maximum for fecal coliform bacteria in recreational waters is 200 colonies/100 mL of water.

The following graphs present county-wide trends in fecal bacteria concentrations for each year that data were collected. High color values may exceed the maximum shown on the legend.

View Station Location Map | View Animated Graphic
1991	1992	1993
1994	1995	1996
1997	1998	1999
2000	2001