2001 Lake Water Quality Report
Comparison of median concentrations for chemical data in City of Orlando lakes from 1991-2001.
2001 Water Quality Report, "Chemical Characteristics"
Table of Contents
| Parameter | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 |
| pH | 7.7 | 7.7 | 7.4 | 7.6 | 7.6 | 7.8 | 7.7 | 7.4 | 7.8 | 7.87 | 7.91 |
| Alkalinity (mg/l as CaCO3) | 47 | 50 | 49 | 45 | 44 | 42 | 44 | 43 | 43 | 46 | 44.0 |
| Total Phosphorus (mg/l) | 0.043 | 0.047 | 0.049 | 0.048 | 0.047 | 0.045 | 0.047 | 0.042 | 0.035 | 0.034 | 0.034 |
| Ortho Phosphorus (mg/l) | <0.005 | <0.005 | <0.005 | <0.005 | <0.005 | <0.005 | <0.005 | <0.005 | <0.005 | <0.004 | <0.004 |
| Total Nitrogen (mg/l) | 0.84 | 0.89 | 0.83 | 0.84 | 0.79 | 0.80 | 0.75 | 0.73 | 0.77 | 0.77 | 0.78 |
| Ammonia (mg/l) | <0.03 | <0.03 | <0.03 | <0.03 | <0.03 | <0.03 | <0.03 | 0.03 | 0.04 | <0.03 | <0.02 |
| Nitrate Nitrogen (mg/l) | <0.03 | <0.03 | <0.02 | <0.02 | <0.02 | <0.02 | <0.02 | 0.02 | 0.02 | <0.02 | <0.02 |
| Nitrite Nitrogen (mg/l) | <0.02 | <0.02 | <0.02 | <0.005 | <0.005 | <0.005 | <0.005 | <0.005 | 0.010 | <0.005 | <0.005 |
| Total Kjeldahal Nitrogen (mg/l) | 0.81 | 0.87 | 0.83 | 0.82 | 0.76 | 0.77 | 0.74 | 0.62 | 0.75 | 0.76 | 0.77 |
| Total Suspended Solids (mg/l) | 5.3 | 7.2 | 6.6 | 7.0 | 7.0 | 6.5 | 5.9 | 4.7 | 5.9 | 5.0 | 4.5 |
| Volatile Suspended Solids (mg/l) | 4.3 | 5.0 | 6.2 | 6.0 | 6.0 | 5.3 | 4.5 | 4.3 | 5.6 | 4.5 | 4.0 |
| Total Dissolved Solids (mg/l) | 120 | 126 | 125 | 116 | 114 | 114 | 108 | 114 | 128 | 130 | 130 |
| Chlorophyll-a (mg/m³) | 19.5 | 20.8 | 26.5 | 25.0 | 23.0 | 21.1 | 19.8 | 21.6 | 21.2 | 16.4 | 17.3 |
| Conductivity (umhos @ 25°C) | 200 | 200 | 199 | 198 | 182 | 173 | 179 | 171 | 176 | 180 | 191 |
| Secchi Depth (m) | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.2 | 1.1 | 1.0 |